c4a0ad47dd
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1964822 Upstream: RHEL-only Currently, vmcore dumping to remote fs gives a warning "eth0: Failed to rename network interface 3 from 'eth0' to 'kdump-eth0': File exists" on Azure Hyper-V VM with accelerated networking because it uses a physical NIC for accelerated networking [1] and the backing physical NIC has the same MAC address as the virtual NIC. In the kdump initrd, an udev rule will try renaming NICs with the given MAC address and fails as expected since there are two NICs having the same MAC address. This udev rule is created automatically when specifying the dracut cmdline "ifname=<interface>:<MAC>". For the case of Azure Hyper-V VM with accelerated networking, only the virtual network interface need to be renamed. So create an udev rule manually. [1] https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-overview Signed-off-by: Coiby Xu <coxu@redhat.com>
1088 lines
33 KiB
Bash
Executable File
1088 lines
33 KiB
Bash
Executable File
#!/bin/bash
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_save_kdump_netifs() {
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local _name
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if [[ -n $2 ]]; then
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_name=$2
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else
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_name=$1
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fi
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unique_netifs[$1]=$_name
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}
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_get_kdump_netifs() {
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echo -n "${!unique_netifs[@]}"
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}
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kdump_module_init() {
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if ! [[ -d "${initdir}/tmp" ]]; then
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mkdir -p "${initdir}/tmp"
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fi
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. /lib/kdump/kdump-lib.sh
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}
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check() {
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[[ $debug ]] && set -x
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#kdumpctl sets this explicitly
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if [ -z "$IN_KDUMP" ] || [ ! -f /etc/kdump.conf ]
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then
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return 1
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fi
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return 0
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}
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depends() {
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local _dep="base shutdown"
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kdump_module_init
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add_opt_module() {
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[[ " $omit_dracutmodules " != *\ $1\ * ]] && _dep="$_dep $1"
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}
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if is_squash_available; then
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add_opt_module squash
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else
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dwarning "Required modules to build a squashed kdump image is missing!"
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fi
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add_opt_module watchdog-modules
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if is_wdt_active; then
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add_opt_module watchdog
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fi
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if is_ssh_dump_target; then
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_dep="$_dep ssh-client"
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fi
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if is_lvm2_thinp_dump_target; then
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if grep -q lvmthinpool-monitor <<< $(dracut --list-modules); then
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add_opt_module lvmthinpool-monitor
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else
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dwarning "Required lvmthinpool-monitor modules is missing! Please upgrade dracut >= 057."
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fi
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fi
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if [ "$(uname -m)" = "s390x" ]; then
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_dep="$_dep znet"
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fi
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if [ -n "$( find /sys/devices -name drm )" ] || [ -d /sys/module/hyperv_fb ]; then
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add_opt_module drm
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fi
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if is_generic_fence_kdump || is_pcs_fence_kdump; then
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_dep="$_dep network"
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fi
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echo $_dep
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}
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kdump_is_bridge() {
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[ -d /sys/class/net/"$1"/bridge ]
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}
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kdump_is_bond() {
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[ -d /sys/class/net/"$1"/bonding ]
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}
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kdump_is_team() {
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[ -f /usr/bin/teamnl ] && teamnl $1 ports &> /dev/null
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}
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kdump_is_vlan() {
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[ -f /proc/net/vlan/"$1" ]
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}
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# $1: netdev name
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source_ifcfg_file() {
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local ifcfg_file
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ifcfg_file=$(get_ifcfg_filename $1)
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if [ -f "${ifcfg_file}" ]; then
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. ${ifcfg_file}
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else
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dwarning "The ifcfg file of $1 is not found!"
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fi
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}
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# $1: netdev name
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kdump_setup_dns() {
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local _nameserver _dns
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local _dnsfile=${initdir}/etc/cmdline.d/42dns.conf
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source_ifcfg_file $1
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[ -n "$DNS1" ] && echo "nameserver=$DNS1" > "$_dnsfile"
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[ -n "$DNS2" ] && echo "nameserver=$DNS2" >> "$_dnsfile"
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while read content;
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do
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_nameserver=$(echo $content | grep ^nameserver)
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[ -z "$_nameserver" ] && continue
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_dns=$(echo $_nameserver | cut -d' ' -f2)
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[ -z "$_dns" ] && continue
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if [ ! -f $_dnsfile ] || [ ! $(cat $_dnsfile | grep -q $_dns) ]; then
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echo "nameserver=$_dns" >> "$_dnsfile"
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fi
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done < "/etc/resolv.conf"
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}
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# $1: repeat times
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# $2: string to be repeated
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# $3: separator
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repeatedly_join_str() {
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local _count="$1"
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local _str="$2"
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local _separator="$3"
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local i _res
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if [[ "$_count" -le 0 ]]; then
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echo -n ""
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return
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fi
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i=0
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_res="$_str"
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((_count--))
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while [[ "$i" -lt "$_count" ]]; do
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((i++))
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_res="${_res}${_separator}${_str}"
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done
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echo -n "$_res"
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}
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# $1: prefix
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# $2: ipv6_flag="-6" indicates it's IPv6
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# Given a prefix, calculate the netmask (equivalent of "ipcalc -m")
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# by concatenating three parts,
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# 1) the groups with all bits set 1
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# 2) a group with partial bits set to 0
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# 3) the groups with all bits set to 0
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cal_netmask_by_prefix() {
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local _prefix="$1"
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local _ipv6_flag="$2" _ipv6
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local _bits_per_octet=8
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local _count _res _octets_per_group _octets_total _seperator _total_groups
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local _max_group_value _max_group_value_repr _bits_per_group _tmp _zero_bits
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if [[ "$_ipv6_flag" == "-6" ]]; then
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_ipv6=1
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else
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_ipv6=0
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fi
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if [[ "$_prefix" -lt 0 || "$_prefix" -gt 128 ]] || \
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( ((!_ipv6)) && [[ "$_prefix" -gt 32 ]] ); then
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derror "Bad prefix:$_prefix for calculating netmask"
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exit 1
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fi
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if ((_ipv6)); then
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_octets_per_group=2
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_octets_total=16
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_seperator=":"
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else
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_octets_per_group=1
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_octets_total=4
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_seperator="."
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fi
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_total_groups=$((_octets_total/_octets_per_group))
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_bits_per_group=$((_octets_per_group * _bits_per_octet))
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_max_group_value=$(((1 << _bits_per_group) - 1))
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if ((_ipv6)); then
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_max_group_value_repr=$(printf "%x" $_max_group_value)
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else
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_max_group_value_repr="$_max_group_value"
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fi
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_count=$((_prefix/_octets_per_group/_bits_per_octet))
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_first_part=$(repeatedly_join_str "$_count" "$_max_group_value_repr" "$_seperator")
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_res="$_first_part"
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_tmp=$((_octets_total*_bits_per_octet-_prefix))
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_zero_bits=$(expr $_tmp % $_bits_per_group)
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if [[ "$_zero_bits" -ne 0 ]]; then
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_second_part=$((_max_group_value >> _zero_bits << _zero_bits))
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if ((_ipv6)); then
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_second_part=$(printf "%x" $_second_part)
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fi
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((_count++))
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if [[ -z "$_first_part" ]]; then
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_res="$_second_part"
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else
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_res="${_first_part}${_seperator}${_second_part}"
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fi
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fi
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_count=$((_total_groups-_count))
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if [[ "$_count" -eq 0 ]]; then
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echo -n "$_res"
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return
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fi
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if ((_ipv6)) && [[ "$_count" -gt 1 ]] ; then
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# use condensed notion for IPv6
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_third_part=":"
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else
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_third_part=$(repeatedly_join_str "$_count" "0" "$_seperator")
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fi
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if [[ -z "$_res" ]] && ((!_ipv6)) ; then
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echo -n "${_third_part}"
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else
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echo -n "${_res}${_seperator}${_third_part}"
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fi
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}
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#$1: netdev name
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#$2: srcaddr
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#if it use static ip echo it, or echo null
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kdump_static_ip() {
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local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
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local _netmask _gateway _ipaddr _target _nexthop _prefix
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_ipaddr=$(ip addr show dev $_netdev permanent | awk "/ $_srcaddr\/.* /{print \$2}")
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if is_ipv6_address $_srcaddr; then
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_ipv6_flag="-6"
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fi
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if [ -n "$_ipaddr" ]; then
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_gateway=$(ip $_ipv6_flag route list dev $_netdev | \
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awk '/^default /{print $3}' | head -n 1)
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if [ "x" != "x"$_ipv6_flag ]; then
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# _ipaddr="2002::56ff:feb6:56d5/64", _netmask is the number after "/"
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_netmask=${_ipaddr#*\/}
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_srcaddr="[$_srcaddr]"
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_gateway="[$_gateway]"
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else
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_prefix=$(cut -d'/' -f2 <<< "$_ipaddr")
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_netmask=$(cal_netmask_by_prefix "$_prefix" "$_ipv6_flag")
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if [[ "$?" -ne 0 ]]; then
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derror "Failed to calculate netmask for $_ipaddr"
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exit 1
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fi
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fi
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echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
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fi
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/sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
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while read _route; do
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_target=`echo $_route | cut -d ' ' -f1`
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_nexthop=`echo $_route | cut -d ' ' -f3`
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if [ "x" != "x"$_ipv6_flag ]; then
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_target="[$_target]"
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_nexthop="[$_nexthop]"
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fi
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echo "rd.route=$_target:$_nexthop:$kdumpnic"
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done >> ${initdir}/etc/cmdline.d/45route-static.conf
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}
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kdump_get_mac_addr() {
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cat /sys/class/net/$1/address
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}
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#Bonding or team master modifies the mac address
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#of its slaves, we should use perm address
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kdump_get_perm_addr() {
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local addr=$(ethtool -P $1 | sed -e 's/Permanent address: //')
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if [ -z "$addr" ] || [ "$addr" = "00:00:00:00:00:00" ]
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then
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derror "Can't get the permanent address of $1"
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else
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echo "$addr"
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fi
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}
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# Prefix kernel assigned names with "kdump-". EX: eth0 -> kdump-eth0
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# Because kernel assigned names are not persistent between 1st and 2nd
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# kernel. We could probably end up with eth0 being eth1, eth0 being
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# eth1, and naming conflict happens.
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kdump_setup_ifname() {
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local _ifname
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# If ifname already has 'kdump-' prefix, we must be switching from
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# fadump to kdump. Skip prefixing 'kdump-' in this case as adding
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# another prefix may truncate the ifname. Since an ifname with
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# 'kdump-' is already persistent, this should be fine.
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if [[ $1 =~ eth* ]] && [[ ! $1 =~ ^kdump-* ]]; then
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_ifname="kdump-$1"
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else
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_ifname="$1"
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fi
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echo "$_ifname"
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}
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kdump_install_nm_netif_allowlist() {
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local _netif _except_netif _netif_allowlist _netif_allowlist_nm_conf
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for _netif in $1; do
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_per_mac=$(kdump_get_perm_addr "$_netif")
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if [[ "$_per_mac" != 'not set' ]]; then
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_except_netif="mac:$_per_mac"
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else
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_except_netif="interface-name:${unique_netifs[${_netif}]}"
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fi
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_netif_allowlist="${_netif_allowlist}except:${_except_netif};"
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done
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_netif_allowlist_nm_conf=${initdir}/tmp/netif_allowlist_nm_conf
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cat << EOF > "$_netif_allowlist_nm_conf"
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[device-others]
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match-device=${_netif_allowlist}
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managed=false
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EOF
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inst "$_netif_allowlist_nm_conf" "/etc/NetworkManager/conf.d/10-kdump-netif_allowlist.conf"
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rm -f "$_netif_allowlist_nm_conf"
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}
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kdump_setup_bridge() {
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local _netdev=$1
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local _brif _dev _mac _kdumpdev
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for _dev in `ls /sys/class/net/$_netdev/brif/`; do
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_kdumpdev=""
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if kdump_is_bond "$_dev"; then
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kdump_setup_bond "$_dev"
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elif kdump_is_team "$_dev"; then
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kdump_setup_team "$_dev"
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elif kdump_is_vlan "$_dev"; then
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kdump_setup_vlan "$_dev"
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else
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_mac=$(kdump_get_mac_addr $_dev)
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_kdumpdev=$(kdump_setup_ifname $_dev)
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echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/41bridge.conf
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fi
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_save_kdump_netifs "$_dev" "$_kdumpdev"
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[[ -z $_kdumpdev ]] && _kdumpdev=$_dev
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_brif+="$_kdumpdev,"
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done
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echo " bridge=$_netdev:$(echo $_brif | sed -e 's/,$//')" >> ${initdir}/etc/cmdline.d/41bridge.conf
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}
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kdump_setup_bond() {
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local _netdev=$1
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local _dev _mac _slaves _kdumpdev
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for _dev in `cat /sys/class/net/$_netdev/bonding/slaves`; do
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_mac=$(kdump_get_perm_addr $_dev)
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_kdumpdev=$(kdump_setup_ifname $_dev)
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_save_kdump_netifs "$_dev" "$_kdumpdev"
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echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/42bond.conf
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_slaves+="$_kdumpdev,"
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done
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echo -n " bond=$_netdev:$(echo $_slaves | sed 's/,$//')" >> ${initdir}/etc/cmdline.d/42bond.conf
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# Get bond options specified in ifcfg
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source_ifcfg_file $_netdev
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bondoptions=":$(echo $BONDING_OPTS | xargs echo | tr " " ",")"
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echo "$bondoptions" >> ${initdir}/etc/cmdline.d/42bond.conf
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}
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kdump_setup_team() {
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local _netdev=$1
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local _dev _mac _slaves _kdumpdev
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for _dev in `teamnl $_netdev ports | awk -F':' '{print $2}'`; do
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_mac=$(kdump_get_perm_addr $_dev)
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_kdumpdev=$(kdump_setup_ifname $_dev)
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_save_kdump_netifs "$_dev" "$_kdumpdev"
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echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/44team.conf
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_slaves+="$_kdumpdev,"
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done
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echo " team=$_netdev:$(echo $_slaves | sed -e 's/,$//')" >> ${initdir}/etc/cmdline.d/44team.conf
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#Buggy version teamdctl outputs to stderr!
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#Try to use the latest version of teamd.
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teamdctl "$_netdev" config dump > ${initdir}/tmp/$$-$_netdev.conf
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if [ $? -ne 0 ]
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then
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derror "teamdctl failed."
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exit 1
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fi
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inst_dir /etc/teamd
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inst_simple ${initdir}/tmp/$$-$_netdev.conf "/etc/teamd/$_netdev.conf"
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rm -f ${initdir}/tmp/$$-$_netdev.conf
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}
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|
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kdump_setup_vlan() {
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local _netdev=$1
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local _phydev="$(awk '/^Device:/{print $2}' /proc/net/vlan/"$_netdev")"
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local _netmac="$(kdump_get_mac_addr $_phydev)"
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local _kdumpdev
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#Just support vlan over bond and team
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if kdump_is_bridge "$_phydev"; then
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derror "Vlan over bridge is not supported!"
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exit 1
|
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elif kdump_is_bond "$_phydev"; then
|
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kdump_setup_bond "$_phydev"
|
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echo " vlan=$(kdump_setup_ifname $_netdev):$_phydev" > ${initdir}/etc/cmdline.d/43vlan.conf
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else
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_kdumpdev="$(kdump_setup_ifname $_phydev)"
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echo " vlan=$(kdump_setup_ifname $_netdev):$_kdumpdev ifname=$_kdumpdev:$_netmac" > ${initdir}/etc/cmdline.d/43vlan.conf
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fi
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_save_kdump_netifs "$_phydev" "$_kdumpdev"
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}
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|
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# find online znet device
|
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# return ifname (_netdev)
|
|
# code reaped from the list_configured function of
|
|
# https://github.com/hreinecke/s390-tools/blob/master/zconf/znetconf
|
|
find_online_znet_device() {
|
|
local CCWGROUPBUS_DEVICEDIR="/sys/bus/ccwgroup/devices"
|
|
local NETWORK_DEVICES d ifname ONLINE
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|
|
[ ! -d "$CCWGROUPBUS_DEVICEDIR" ] && return
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|
NETWORK_DEVICES=$(find $CCWGROUPBUS_DEVICEDIR)
|
|
for d in $NETWORK_DEVICES
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|
do
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|
[ ! -f "$d/online" ] && continue
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|
read ONLINE < $d/online
|
|
if [ $ONLINE -ne 1 ]; then
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continue
|
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fi
|
|
# determine interface name, if there (only for qeth and if
|
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# device is online)
|
|
if [ -f $d/if_name ]
|
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then
|
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read ifname < $d/if_name
|
|
elif [ -d $d/net ]
|
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then
|
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ifname=$(ls $d/net/)
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fi
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[ -n "$ifname" ] && break
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done
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echo -n "$ifname"
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}
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|
|
# setup s390 znet cmdline
|
|
# $1: netdev name
|
|
kdump_setup_znet() {
|
|
local _options=""
|
|
local _netdev=$1
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|
|
|
source_ifcfg_file $_netdev
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|
|
|
[[ -z "$NETTYPE" ]] && return
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|
[[ -z "$SUBCHANNELS" ]] && return
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|
|
|
for i in $OPTIONS; do
|
|
_options=${_options},$i
|
|
done
|
|
echo rd.znet=${NETTYPE},${SUBCHANNELS}${_options} rd.znet_ifname=$(kdump_setup_ifname $_netdev):${SUBCHANNELS} > ${initdir}/etc/cmdline.d/30znet.conf
|
|
}
|
|
|
|
_get_nic_driver() {
|
|
ethtool -i "$1" | sed -n -E "s/driver: (.*)/\1/p"
|
|
}
|
|
|
|
_rename_hypver_netdev() {
|
|
local _udev_rule_dir
|
|
|
|
_udev_rule_dir=${initdir}/etc/udev/rules.d
|
|
mkdir -p "$_udev_rule_dir"
|
|
printf 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="hv_netvsc", ATTR{address}=="%s", ATTR{type}=="1", NAME="%s"\n' "$2" "$1" > "${_udev_rule_dir}/80-hv_netvsc-ifname.rules"
|
|
}
|
|
|
|
# Setup dracut to bringup a given network interface
|
|
kdump_setup_netdev() {
|
|
local _netdev=$1 _srcaddr=$2
|
|
local _static _proto _ip_conf _ip_opts _ifname_opts kdumpnic
|
|
local _netmac=$(kdump_get_mac_addr $_netdev)
|
|
local _znet_netdev
|
|
|
|
kdumpnic=$(kdump_setup_ifname $_netdev)
|
|
|
|
_znet_netdev=$(find_online_znet_device)
|
|
if [[ -n "$_znet_netdev" ]]; then
|
|
$(kdump_setup_znet "$_znet_netdev")
|
|
if [[ $? != 0 ]]; then
|
|
derror "Failed to set up znet"
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
_static=$(kdump_static_ip $_netdev $_srcaddr $kdumpnic)
|
|
if [ -n "$_static" ]; then
|
|
_proto=none
|
|
elif is_ipv6_address $_srcaddr; then
|
|
_proto=auto6
|
|
else
|
|
_proto=dhcp
|
|
fi
|
|
|
|
_ip_conf="${initdir}/etc/cmdline.d/40ip.conf"
|
|
_ip_opts=" ip=${_static}$kdumpnic:${_proto}"
|
|
|
|
# dracut doesn't allow duplicated configuration for same NIC, even they're exactly the same.
|
|
# so we have to avoid adding duplicates
|
|
# We should also check /proc/cmdline for existing ip=xx arg.
|
|
# For example, iscsi boot will specify ip=xxx arg in cmdline.
|
|
if [ ! -f $_ip_conf ] || ! grep -q $_ip_opts $_ip_conf &&\
|
|
! grep -q "ip=[^[:space:]]*$_netdev" /proc/cmdline; then
|
|
echo "$_ip_opts" >> $_ip_conf
|
|
fi
|
|
|
|
if kdump_is_bridge "$_netdev"; then
|
|
kdump_setup_bridge "$_netdev"
|
|
elif kdump_is_bond "$_netdev"; then
|
|
kdump_setup_bond "$_netdev"
|
|
elif kdump_is_team "$_netdev"; then
|
|
kdump_setup_team "$_netdev"
|
|
elif kdump_is_vlan "$_netdev"; then
|
|
kdump_setup_vlan "$_netdev"
|
|
else
|
|
if [[ $(_get_nic_driver "$1") != hv_netvsc ]]; then
|
|
_ifname_opts=" ifname=$kdumpnic:$_netmac"
|
|
echo "$_ifname_opts" >> $_ip_conf
|
|
else
|
|
_rename_hypver_netdev "$kdumpnic" "$_netmac"
|
|
fi
|
|
fi
|
|
_save_kdump_netifs "$_netdev" "$_kdumpdev"
|
|
|
|
kdump_setup_dns "$_netdev"
|
|
|
|
if [ ! -f ${initdir}/etc/cmdline.d/50neednet.conf ]; then
|
|
# network-manager module needs this parameter
|
|
echo "rd.neednet" >> ${initdir}/etc/cmdline.d/50neednet.conf
|
|
fi
|
|
}
|
|
|
|
get_ip_route_field()
|
|
{
|
|
if `echo $1 | grep -q $2`; then
|
|
echo ${1##*$2} | cut -d ' ' -f1
|
|
fi
|
|
}
|
|
|
|
#Function:kdump_install_net
|
|
#$1: config values of net line in kdump.conf
|
|
#$2: srcaddr of network device
|
|
kdump_install_net() {
|
|
local _server _netdev _srcaddr _route _serv_tmp
|
|
local config_val="$1"
|
|
|
|
_server=$(get_remote_host $config_val)
|
|
|
|
if is_hostname $_server; then
|
|
_serv_tmp=`getent ahosts $_server | grep -v : | head -n 1`
|
|
if [ -z "$_serv_tmp" ]; then
|
|
_serv_tmp=`getent ahosts $_server | head -n 1`
|
|
fi
|
|
_server=`echo $_serv_tmp | cut -d' ' -f1`
|
|
fi
|
|
|
|
_route=`/sbin/ip -o route get to $_server 2>&1`
|
|
[ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
|
|
|
|
#the field in the ip output changes if we go to another subnet
|
|
_srcaddr=$(get_ip_route_field "$_route" "src")
|
|
_netdev=$(get_ip_route_field "$_route" "dev")
|
|
|
|
kdump_setup_netdev "${_netdev}" "${_srcaddr}"
|
|
|
|
#save netdev used for kdump as cmdline
|
|
# Whoever calling kdump_install_net() is setting up the default gateway,
|
|
# ie. bootdev/kdumpnic. So don't override the setting if calling
|
|
# kdump_install_net() for another time. For example, after setting eth0 as
|
|
# the default gate way for network dump, eth1 in the fence kdump path will
|
|
# call kdump_install_net again and we don't want eth1 to be the default
|
|
# gateway.
|
|
if [ ! -f ${initdir}/etc/cmdline.d/60kdumpnic.conf ] &&
|
|
[ ! -f ${initdir}/etc/cmdline.d/70bootdev.conf ]; then
|
|
echo "kdumpnic=$(kdump_setup_ifname $_netdev)" > ${initdir}/etc/cmdline.d/60kdumpnic.conf
|
|
echo "bootdev=$(kdump_setup_ifname $_netdev)" > ${initdir}/etc/cmdline.d/70bootdev.conf
|
|
fi
|
|
}
|
|
|
|
# install etc/kdump/pre.d and /etc/kdump/post.d
|
|
kdump_install_pre_post_conf() {
|
|
if [ -d /etc/kdump/pre.d ]; then
|
|
for file in /etc/kdump/pre.d/*; do
|
|
if [ -x "$file" ]; then
|
|
dracut_install $file
|
|
elif [ $file != "/etc/kdump/pre.d/*" ]; then
|
|
echo "$file is not executable"
|
|
fi
|
|
done
|
|
fi
|
|
|
|
if [ -d /etc/kdump/post.d ]; then
|
|
for file in /etc/kdump/post.d/*; do
|
|
if [ -x "$file" ]; then
|
|
dracut_install $file
|
|
elif [ $file != "/etc/kdump/post.d/*" ]; then
|
|
echo "$file is not executable"
|
|
fi
|
|
done
|
|
fi
|
|
}
|
|
|
|
default_dump_target_install_conf()
|
|
{
|
|
local _target _fstype
|
|
local _mntpoint _save_path
|
|
|
|
is_user_configured_dump_target && return
|
|
|
|
_save_path=$(get_bind_mount_source $(get_save_path))
|
|
_target=$(get_target_from_path $_save_path)
|
|
_mntpoint=$(get_mntpoint_from_target $_target)
|
|
|
|
_fstype=$(get_fs_type_from_target $_target)
|
|
if is_fs_type_nfs $_fstype; then
|
|
kdump_install_net "$_target"
|
|
_fstype="nfs"
|
|
else
|
|
_target=$(kdump_get_persistent_dev $_target)
|
|
fi
|
|
|
|
echo "$_fstype $_target" >> ${initdir}/tmp/$$-kdump.conf
|
|
|
|
# don't touch the path under root mount
|
|
if [ "$_mntpoint" != "/" ]; then
|
|
_save_path=${_save_path##"$_mntpoint"}
|
|
fi
|
|
|
|
#erase the old path line, then insert the parsed path
|
|
sed -i "/^path/d" ${initdir}/tmp/$$-kdump.conf
|
|
echo "path $_save_path" >> ${initdir}/tmp/$$-kdump.conf
|
|
}
|
|
|
|
#install kdump.conf and what user specifies in kdump.conf
|
|
kdump_install_conf() {
|
|
local _opt _val _pdev
|
|
sed -ne '/^#/!p' /etc/kdump.conf > ${initdir}/tmp/$$-kdump.conf
|
|
|
|
while read _opt _val;
|
|
do
|
|
# remove inline comments after the end of a directive.
|
|
case "$_opt" in
|
|
raw)
|
|
_pdev=$(persistent_policy="by-id" kdump_get_persistent_dev $_val)
|
|
sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#" ${initdir}/tmp/$$-kdump.conf
|
|
;;
|
|
ext[234]|xfs|btrfs|minix)
|
|
_pdev=$(kdump_get_persistent_dev $_val)
|
|
sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#" ${initdir}/tmp/$$-kdump.conf
|
|
;;
|
|
ssh|nfs)
|
|
kdump_install_net "$_val"
|
|
;;
|
|
dracut_args)
|
|
if [[ $(get_dracut_args_fstype "$_val") = nfs* ]] ; then
|
|
kdump_install_net "$(get_dracut_args_target "$_val")"
|
|
fi
|
|
;;
|
|
kdump_pre|kdump_post|extra_bins)
|
|
dracut_install $_val
|
|
;;
|
|
core_collector)
|
|
dracut_install "${_val%%[[:blank:]]*}"
|
|
;;
|
|
esac
|
|
done <<< "$(read_strip_comments /etc/kdump.conf)"
|
|
|
|
kdump_install_pre_post_conf
|
|
|
|
default_dump_target_install_conf
|
|
|
|
kdump_configure_fence_kdump "${initdir}/tmp/$$-kdump.conf"
|
|
inst "${initdir}/tmp/$$-kdump.conf" "/etc/kdump.conf"
|
|
rm -f ${initdir}/tmp/$$-kdump.conf
|
|
}
|
|
|
|
# Default sysctl parameters should suffice for kdump kernel.
|
|
# Remove custom configurations sysctl.conf & sysctl.d/*
|
|
remove_sysctl_conf() {
|
|
|
|
# As custom configurations like vm.min_free_kbytes can lead
|
|
# to OOM issues in kdump kernel, avoid them
|
|
rm -f "${initdir}/etc/sysctl.conf"
|
|
rm -rf "${initdir}/etc/sysctl.d"
|
|
rm -rf "${initdir}/run/sysctl.d"
|
|
rm -rf "${initdir}/usr/lib/sysctl.d"
|
|
}
|
|
|
|
kdump_iscsi_get_rec_val() {
|
|
|
|
local result
|
|
|
|
# The open-iscsi 742 release changed to using flat files in
|
|
# /var/lib/iscsi.
|
|
|
|
result=$(/sbin/iscsiadm --show -m session -r ${1} | grep "^${2} = ")
|
|
result=${result##* = }
|
|
echo $result
|
|
}
|
|
|
|
kdump_get_iscsi_initiator() {
|
|
local _initiator
|
|
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
|
|
|
|
[ -f "$initiator_conf" ] || return 1
|
|
|
|
while read _initiator; do
|
|
[ -z "${_initiator%%#*}" ] && continue # Skip comment lines
|
|
|
|
case $_initiator in
|
|
InitiatorName=*)
|
|
initiator=${_initiator#InitiatorName=}
|
|
echo "rd.iscsi.initiator=${initiator}"
|
|
return 0;;
|
|
*) ;;
|
|
esac
|
|
done < ${initiator_conf}
|
|
|
|
return 1
|
|
}
|
|
|
|
# Figure out iBFT session according to session type
|
|
is_ibft() {
|
|
[ "$(kdump_iscsi_get_rec_val $1 "node.discovery_type")" = fw ]
|
|
}
|
|
|
|
kdump_setup_iscsi_device() {
|
|
local path=$1
|
|
local tgt_name; local tgt_ipaddr;
|
|
local username; local password; local userpwd_str;
|
|
local username_in; local password_in; local userpwd_in_str;
|
|
local netdev
|
|
local srcaddr
|
|
local idev
|
|
local netroot_str ; local initiator_str;
|
|
local netroot_conf="${initdir}/etc/cmdline.d/50iscsi.conf"
|
|
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
|
|
|
|
dinfo "Found iscsi component $1"
|
|
|
|
# Check once before getting explicit values, so we can bail out early,
|
|
# e.g. in case of pure-hardware(all-offload) iscsi.
|
|
if ! /sbin/iscsiadm -m session -r ${path} &>/dev/null ; then
|
|
return 1
|
|
fi
|
|
|
|
if is_ibft ${path}; then
|
|
return
|
|
fi
|
|
|
|
# Remove software iscsi cmdline generated by 95iscsi,
|
|
# and let kdump regenerate here.
|
|
rm -f ${initdir}/etc/cmdline.d/95iscsi.conf
|
|
|
|
tgt_name=$(kdump_iscsi_get_rec_val ${path} "node.name")
|
|
tgt_ipaddr=$(kdump_iscsi_get_rec_val ${path} "node.conn\[0\].address")
|
|
|
|
# get and set username and password details
|
|
username=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username")
|
|
[ "$username" == "<empty>" ] && username=""
|
|
password=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password")
|
|
[ "$password" == "<empty>" ] && password=""
|
|
username_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username_in")
|
|
[ -n "$username" ] && userpwd_str="$username:$password"
|
|
|
|
# get and set incoming username and password details
|
|
[ "$username_in" == "<empty>" ] && username_in=""
|
|
password_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password_in")
|
|
[ "$password_in" == "<empty>" ] && password_in=""
|
|
|
|
[ -n "$username_in" ] && userpwd_in_str=":$username_in:$password_in"
|
|
|
|
netdev=$(/sbin/ip route get to ${tgt_ipaddr} | \
|
|
sed 's|.*dev \(.*\).*|\1|g')
|
|
srcaddr=$(echo $netdev | awk '{ print $3; exit }')
|
|
netdev=$(echo $netdev | awk '{ print $1; exit }')
|
|
|
|
kdump_setup_netdev $netdev $srcaddr
|
|
|
|
# prepare netroot= command line
|
|
# FIXME: Do we need to parse and set other parameters like protocol, port
|
|
# iscsi_iface_name, netdev_name, LUN etc.
|
|
|
|
if is_ipv6_address $tgt_ipaddr; then
|
|
tgt_ipaddr="[$tgt_ipaddr]"
|
|
fi
|
|
netroot_str="netroot=iscsi:${userpwd_str}${userpwd_in_str}@$tgt_ipaddr::::$tgt_name"
|
|
|
|
[[ -f $netroot_conf ]] || touch $netroot_conf
|
|
|
|
# If netroot target does not exist already, append.
|
|
if ! grep -q $netroot_str $netroot_conf; then
|
|
echo $netroot_str >> $netroot_conf
|
|
dinfo "Appended $netroot_str to $netroot_conf"
|
|
fi
|
|
|
|
# Setup initator
|
|
initiator_str=$(kdump_get_iscsi_initiator)
|
|
[ $? -ne "0" ] && derror "Failed to get initiator name" && return 1
|
|
|
|
# If initiator details do not exist already, append.
|
|
if ! grep -q "$initiator_str" $netroot_conf; then
|
|
echo "$initiator_str" >> $netroot_conf
|
|
dinfo "Appended "$initiator_str" to $netroot_conf"
|
|
fi
|
|
}
|
|
|
|
kdump_check_iscsi_targets () {
|
|
# If our prerequisites are not met, fail anyways.
|
|
type -P iscsistart >/dev/null || return 1
|
|
|
|
kdump_check_setup_iscsi() {
|
|
local _dev
|
|
_dev=$1
|
|
|
|
[[ -L /sys/dev/block/$_dev ]] || return
|
|
cd "$(readlink -f /sys/dev/block/$_dev)"
|
|
until [[ -d sys || -d iscsi_session ]]; do
|
|
cd ..
|
|
done
|
|
[[ -d iscsi_session ]] && kdump_setup_iscsi_device "$PWD"
|
|
}
|
|
|
|
[[ $hostonly ]] || [[ $mount_needs ]] && {
|
|
for_each_host_dev_and_slaves_all kdump_check_setup_iscsi
|
|
}
|
|
}
|
|
|
|
# hostname -a is deprecated, do it by ourself
|
|
get_alias() {
|
|
local ips
|
|
local entries
|
|
local alias_set
|
|
|
|
ips=$(hostname -I)
|
|
for ip in $ips
|
|
do
|
|
# in /etc/hosts, alias can come at the 2nd column
|
|
entries=$(grep $ip /etc/hosts | awk '{ $1=""; print $0 }')
|
|
if [ $? -eq 0 ]; then
|
|
alias_set="$alias_set $entries"
|
|
fi
|
|
done
|
|
|
|
echo $alias_set
|
|
}
|
|
|
|
is_localhost() {
|
|
local hostnames=$(hostname -A)
|
|
local shortnames=$(hostname -A -s)
|
|
local aliasname=$(get_alias)
|
|
local nodename=$1
|
|
|
|
hostnames="$hostnames $shortnames $aliasname"
|
|
|
|
for name in ${hostnames}; do
|
|
if [ "$name" == "$nodename" ]; then
|
|
return 0
|
|
fi
|
|
done
|
|
return 1
|
|
}
|
|
|
|
# retrieves fence_kdump nodes from Pacemaker cluster configuration
|
|
get_pcs_fence_kdump_nodes() {
|
|
local nodes
|
|
|
|
# get cluster nodes from cluster cib, get interface and ip address
|
|
nodelist=`pcs cluster cib | xmllint --xpath "/cib/status/node_state/@uname" -`
|
|
|
|
# nodelist is formed as 'uname="node1" uname="node2" ... uname="nodeX"'
|
|
# we need to convert each to node1, node2 ... nodeX in each iteration
|
|
for node in ${nodelist}; do
|
|
# convert $node from 'uname="nodeX"' to 'nodeX'
|
|
eval $node
|
|
nodename=$uname
|
|
# Skip its own node name
|
|
if [ "$nodename" = `hostname` -o "$nodename" = `hostname -s` ]; then
|
|
continue
|
|
fi
|
|
nodes="$nodes $nodename"
|
|
done
|
|
|
|
echo $nodes
|
|
}
|
|
|
|
# retrieves fence_kdump args from config file
|
|
get_pcs_fence_kdump_args() {
|
|
if [ -f $FENCE_KDUMP_CONFIG_FILE ]; then
|
|
. $FENCE_KDUMP_CONFIG_FILE
|
|
echo $FENCE_KDUMP_OPTS
|
|
fi
|
|
}
|
|
|
|
get_generic_fence_kdump_nodes() {
|
|
local filtered
|
|
local nodes
|
|
|
|
nodes=$(get_option_value "fence_kdump_nodes")
|
|
for node in ${nodes}; do
|
|
# Skip its own node name
|
|
if is_localhost $node; then
|
|
continue
|
|
fi
|
|
filtered="$filtered $node"
|
|
done
|
|
echo $filtered
|
|
}
|
|
|
|
# setup fence_kdump in cluster
|
|
# setup proper network and install needed files
|
|
kdump_configure_fence_kdump () {
|
|
local kdump_cfg_file=$1
|
|
local nodes
|
|
local args
|
|
|
|
if is_generic_fence_kdump; then
|
|
nodes=$(get_generic_fence_kdump_nodes)
|
|
|
|
elif is_pcs_fence_kdump; then
|
|
nodes=$(get_pcs_fence_kdump_nodes)
|
|
|
|
# set appropriate options in kdump.conf
|
|
echo "fence_kdump_nodes $nodes" >> ${kdump_cfg_file}
|
|
|
|
args=$(get_pcs_fence_kdump_args)
|
|
if [ -n "$args" ]; then
|
|
echo "fence_kdump_args $args" >> ${kdump_cfg_file}
|
|
fi
|
|
|
|
else
|
|
# fence_kdump not configured
|
|
return 1
|
|
fi
|
|
|
|
# setup network for each node
|
|
for node in ${nodes}; do
|
|
kdump_install_net $node
|
|
done
|
|
|
|
dracut_install /etc/hosts
|
|
dracut_install /etc/nsswitch.conf
|
|
dracut_install $FENCE_KDUMP_SEND
|
|
}
|
|
|
|
# Install a random seed used to feed /dev/urandom
|
|
# By the time kdump service starts, /dev/uramdom is already fed by systemd
|
|
kdump_install_random_seed() {
|
|
local poolsize=`cat /proc/sys/kernel/random/poolsize`
|
|
|
|
if [ ! -d ${initdir}/var/lib/ ]; then
|
|
mkdir -p ${initdir}/var/lib/
|
|
fi
|
|
|
|
dd if=/dev/urandom of=${initdir}/var/lib/random-seed \
|
|
bs=$poolsize count=1 2> /dev/null
|
|
}
|
|
|
|
remove_cpu_online_rule() {
|
|
local file=${initdir}/usr/lib/udev/rules.d/40-redhat.rules
|
|
|
|
sed -i '/SUBSYSTEM=="cpu"/d' $file
|
|
}
|
|
|
|
kdump_install_systemd_conf() {
|
|
local failure_action=$(get_option_value "failure_action")
|
|
|
|
# Kdump turns out to require longer default systemd mount timeout
|
|
# than 1st kernel(90s by default), we use default 300s for kdump.
|
|
grep -r "^[[:space:]]*DefaultTimeoutStartSec=" ${initdir}/etc/systemd/system.conf* &>/dev/null
|
|
if [ $? -ne 0 ]; then
|
|
mkdir -p ${initdir}/etc/systemd/system.conf.d
|
|
echo "[Manager]" > ${initdir}/etc/systemd/system.conf.d/kdump.conf
|
|
echo "DefaultTimeoutStartSec=300s" >> ${initdir}/etc/systemd/system.conf.d/kdump.conf
|
|
fi
|
|
|
|
# Forward logs to console directly, and don't read Kmsg, this avoids
|
|
# unneccessary memory consumption and make console output more useful.
|
|
# Only do so for non fadump image.
|
|
mkdir -p ${initdir}/etc/systemd/journald.conf.d
|
|
echo "[Journal]" > ${initdir}/etc/systemd/journald.conf.d/kdump.conf
|
|
echo "Storage=volatile" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
|
|
echo "ReadKMsg=no" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
|
|
echo "ForwardToConsole=yes" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
|
|
}
|
|
|
|
install() {
|
|
declare -A unique_netifs
|
|
local arch _netifs
|
|
|
|
kdump_module_init
|
|
kdump_install_conf
|
|
remove_sysctl_conf
|
|
|
|
# Onlining secondary cpus breaks kdump completely on KVM on Power hosts
|
|
# Though we use maxcpus=1 by default but 40-redhat.rules will bring up all
|
|
# possible cpus by default. (rhbz1270174 rhbz1266322)
|
|
# Thus before we get the kernel fix and the systemd rule fix let's remove
|
|
# the cpu online rule in kdump initramfs.
|
|
arch=$(uname -m)
|
|
if [[ "$arch" = "ppc64le" ]] || [[ "$arch" = "ppc64" ]]; then
|
|
remove_cpu_online_rule
|
|
fi
|
|
|
|
if is_ssh_dump_target; then
|
|
kdump_install_random_seed
|
|
fi
|
|
dracut_install -o /etc/adjtime /etc/localtime
|
|
inst "$moddir/monitor_dd_progress" "/kdumpscripts/monitor_dd_progress"
|
|
chmod +x ${initdir}/kdumpscripts/monitor_dd_progress
|
|
inst "/bin/dd" "/bin/dd"
|
|
inst "/bin/tail" "/bin/tail"
|
|
inst "/bin/date" "/bin/date"
|
|
inst "/bin/sync" "/bin/sync"
|
|
inst "/bin/cut" "/bin/cut"
|
|
inst "/bin/head" "/bin/head"
|
|
inst "/sbin/makedumpfile" "/sbin/makedumpfile"
|
|
inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg"
|
|
inst "/usr/bin/printf" "/sbin/printf"
|
|
inst "/usr/bin/logger" "/sbin/logger"
|
|
inst "/usr/bin/chmod" "/sbin/chmod"
|
|
inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
|
|
inst "/lib/kdump/kdump-lib-initramfs.sh" "/lib/kdump-lib-initramfs.sh"
|
|
inst "/lib/kdump/kdump-logger.sh" "/lib/kdump-logger.sh"
|
|
inst "$moddir/kdump.sh" "/usr/bin/kdump.sh"
|
|
inst "$moddir/kdump-capture.service" "$systemdsystemunitdir/kdump-capture.service"
|
|
systemctl -q --root "$initdir" add-wants initrd.target kdump-capture.service
|
|
inst "$moddir/kdump-error-handler.sh" "/usr/bin/kdump-error-handler.sh"
|
|
inst "$moddir/kdump-error-handler.service" "$systemdsystemunitdir/kdump-error-handler.service"
|
|
# Replace existing emergency service and emergency target
|
|
cp "$moddir/kdump-emergency.service" "$initdir/$systemdsystemunitdir/emergency.service"
|
|
cp "$moddir/kdump-emergency.target" "$initdir/$systemdsystemunitdir/emergency.target"
|
|
# Also redirect dracut-emergency to kdump error handler
|
|
ln_r "$systemdsystemunitdir/emergency.service" "$systemdsystemunitdir/dracut-emergency.service"
|
|
|
|
# Check for all the devices and if any device is iscsi, bring up iscsi
|
|
# target. Ideally all this should be pushed into dracut iscsi module
|
|
# at some point of time.
|
|
kdump_check_iscsi_targets
|
|
|
|
_netifs=$(_get_kdump_netifs)
|
|
if [[ -n "$_netifs" ]]; then
|
|
kdump_install_nm_netif_allowlist "$_netifs"
|
|
fi
|
|
|
|
kdump_install_systemd_conf
|
|
|
|
# For the lvm type target under kdump, in /etc/lvm/lvm.conf we can
|
|
# safely replace "reserved_memory=XXXX"(default value is 8192) with
|
|
# "reserved_memory=1024" to lower memory pressure under kdump. We do
|
|
# it unconditionally here, if "/etc/lvm/lvm.conf" doesn't exist, it
|
|
# actually does nothing.
|
|
sed -i -e \
|
|
's/\(^[[:space:]]*reserved_memory[[:space:]]*=\)[[:space:]]*[[:digit:]]*/\1 1024/' \
|
|
${initdir}/etc/lvm/lvm.conf &>/dev/null
|
|
|
|
# Save more memory by dropping switch root capability
|
|
dracut_no_switch_root
|
|
}
|