Add ssh dump support
Add ssh dump support changes including below items: 1. sshkey option 2. sshkey propagate 3. fix a bug of _server ip calculation for dump target string 4. change the prefix of kdump hook from 93 to 01 to avoid dhclient and other cleanups happening before us 5. enable network with dracut cmdline rd.neednet=1 when there's network target config [v1 - v2]: Only check_ssh_target when there's ssh dump target in kdump config file [v2 -> v3] style fixes: trailing spaces and space before tab indent remove set -x simply check_ssh_target use awk to get sshkey option value change pivot hook order to 0000 Signed-off-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Dave Young
Cong Wang
parent
6ffa63d416
commit
ba0aa24316
@ -102,6 +102,7 @@
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#ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937
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#net my.server.com:/export/tmp
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#net user@my.server.com
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#sshkey /root/.ssh/kdump_id_rsa
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#path /var/crash
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#core_collector makedumpfile -c
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#link_delay 60
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@ -8,6 +8,15 @@ CORE_COLLECTOR="makedumpfile -d 31 -c"
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DEFAULT_ACTION="dump_rootfs"
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DATEDIR=`date +%d.%m.%y-%T`
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DUMP_INSTRUCTION=""
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SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
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# we use manual setup nics in udev rules,
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# so we need to test network is really ok
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wait_for_net_ok() {
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local ip=$(getarg ip)
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local iface=`echo $ip|cut -d':' -f1`
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return $(wait_for_route_ok $iface)
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}
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do_default_action()
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{
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@ -96,8 +105,8 @@ dump_nfs()
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dump_ssh()
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{
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ssh -q -o BatchMode=yes -o StrictHostKeyChecking=yes $1 mkdir -p $KDUMP_PATH/$DATEDIR || return 1
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scp -q -o BatchMode=yes -o StrictHostKeyChecking=yes /proc/vmcore "$1:$KDUMP_PATH/$DATEDIR" || return 1
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ssh -q -i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes $2 mkdir -p $KDUMP_PATH/$DATEDIR || return 1
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scp -q -i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes /proc/vmcore "$2:$KDUMP_PATH/$DATEDIR" || return 1
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return 0
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}
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@ -105,26 +114,19 @@ read_kdump_conf()
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{
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local conf_file="/etc/kdump.conf"
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if [ -f "$conf_file" ]; then
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# first get the necessary variables
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while read config_opt config_val;
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do
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case "$config_opt" in
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ext[234]|xfs|btrfs|minix)
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add_dump_code "dump_localfs $config_val || do_default_action"
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;;
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raw)
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add_dump_code "dump_raw $config_val || do_default_action"
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;;
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path)
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case "$config_opt" in
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path)
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KDUMP_PATH="$config_val"
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;;
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core_collector)
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CORE_COLLECTOR="$config_val"
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;;
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net)
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if [[ "$config_val" =~ "@" ]]; then
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add_dump_code "dump_ssh $config_val || do_default_action"
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else
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add_dump_code "dump_nfs $config_val || do_default_action"
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core_collector)
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CORE_COLLECTOR="$config_val"
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;;
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sshkey)
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if [ -f "$config_val" ]; then
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SSH_KEY_LOCATION=$config_val
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fi
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;;
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default)
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@ -142,8 +144,29 @@ read_kdump_conf()
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DEFAULT_ACTION="poweroff -f"
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;;
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esac
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;;
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esac
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;;
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esac
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done < $conf_file
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# rescan for add code for dump target
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while read config_opt config_val;
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do
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case "$config_opt" in
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ext[234]|xfs|btrfs|minix)
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add_dump_code "dump_localfs $config_val || do_default_action"
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;;
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raw)
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add_dump_code "dump_raw $config_val || do_default_action"
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;;
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net)
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wait_for_net_ok
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if [[ "$config_val" =~ "@" ]]; then
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add_dump_code "dump_ssh $SSH_KEY_LOCATION $config_val || do_default_action"
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else
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add_dump_code "dump_nfs $config_val || do_default_action"
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fi
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;;
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esac
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done < $conf_file
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fi
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}
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@ -52,7 +52,7 @@ install() {
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;;
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net)
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if strstr "$config_val" "@"; then
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_server=$(echo $config_val | sed -e 's#.*@\(.*\):.*#\1#')
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_server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
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else
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_server=$(echo $config_val | sed -e 's#\(.*\):.*#\1#')
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fi
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@ -68,7 +68,7 @@ install() {
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# we are on the same subnet
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_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`
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fi
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echo " ip=$_netdev:dhcp" > ${initdir}/etc/cmdline.d/40ip.conf
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echo " ip=$_netdev:dhcp rd.neednet=1" > ${initdir}/etc/cmdline.d/40ip.conf
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if is_bridge "$_netdev"; then
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echo " bridge=$_netdev:$(cd /sys/class/net/$_netdev/brif/; echo *)" > ${initdir}/etc/cmdline.d/41bridge.conf
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elif is_bond "$_netdev"; then
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@ -84,8 +84,8 @@ install() {
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inst "/bin/date" "/bin/date"
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inst "/bin/sync" "/bin/sync"
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inst "/bin/cut" "/bin/cut"
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inst "/sbin/makedumpfile" "/sbin/makedumpfile"
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inst "/tmp/$$-kdump.conf" "/etc/kdump.conf"
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inst_hook pre-pivot 93 "$moddir/kdump.sh"
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inst_hook pre-pivot 0000 "$moddir/kdump.sh"
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}
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82
kdumpctl
82
kdumpctl
@ -10,6 +10,9 @@ KDUMP_COMMANDLINE=""
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KEXEC_ARGS=""
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KDUMP_CONFIG_FILE="/etc/kdump.conf"
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MKDUMPRD="/sbin/mkdumprd -d -f"
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SAVE_PATH=/var/crash
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SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
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DUMP_TARGET=""
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LOGGER="/usr/bin/logger -p info -t kdump"
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@ -171,8 +174,56 @@ function load_kdump()
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fi
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}
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function check_ssh_config()
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{
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while read config_opt config_val; do
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case "$config_opt" in
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sshkey)
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if [ -f "$config_val" ]; then
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# canonicalize the path
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SSH_KEY_LOCATION=$(/usr/bin/readlink -m $config_val)
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else
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echo "WARNING: '$config_val' doesn't exist, using default value '$SSH_KEY_LOCATION'"
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fi
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;;
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path)
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SAVE_PATH=$config_val
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;;
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net)
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DUMP_TARGET=$config_val
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;;
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*)
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;;
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esac
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done < $KDUMP_CONFIG_FILE
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#make sure they've configured kdump.conf for ssh dumps
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local SSH_TARGET=`echo -n $DUMP_TARGET|sed '/.*@/p'`
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if [ -z "$SSH_TARGET" ]; 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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function check_ssh_target()
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{
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ssh -q -i $SSH_KEY_LOCATION -o BatchMode=yes $DUMP_TARGET mkdir -p $SAVE_PATH
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if [ $? -ne 0 ]; then
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echo "Could not create $DUMP_TARGET:$SAVE_PATH, you probably need to run \"service kdump propagate\""
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exit $?
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fi
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return 0
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}
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function propagate_ssh_key()
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{
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check_ssh_config
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if [ $? -ne 0 ]; then
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echo "No ssh config specified in $KDUMP_CONFIG_FILE. Can't propagate"
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$LOGGER "$errmsg, no ssh config specified in $KDUMP_CONFIG_FILE"
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exit 1
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fi
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#Check if selinux is on... must flip to permissive mode
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#for the moment to create key, then flip back...
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se_enforce=`/usr/sbin/sestatus | grep -c "^Current mode.*enforcing"`
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@ -180,33 +231,15 @@ function propagate_ssh_key()
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/usr/sbin/setenforce 0 2>&1 > /dev/null
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fi
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#Use dedicated key for kdump
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if [ ! -d /root/.ssh ]; then
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mkdir /root/.ssh
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chmod 700 /root/.ssh
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fi
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if [ ! -e /root/.ssh/config ]; then
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echo "IdentityFile ~/.ssh/kdump_id_rsa" >> /root/.ssh/config
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elif [ `grep -c kdump_id_rsa /root/.ssh/config` -eq 0 ]; then
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echo "IdentityFile ~/.ssh/kdump_id_rsa" >> /root/.ssh/config
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fi
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local KEYFILE=/root/.ssh/kdump_id_rsa.pub
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local KEYFILE=$SSH_KEY_LOCATION
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local errmsg="Failed to propagate ssh key"
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#make sure they've configured kdump.conf for ssh dumps
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local SSH_TARGET=`awk '/^\ *net.*@.*$/ {print $0}' $KDUMP_CONFIG_FILE`
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if [ -z "$SSH_TARGET" ]; then
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echo "No ssh config specified in $KDUMP_CONFIG_FILE. Can't propagate"
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$LOGGER "$errmsg, no ssh config specified in $KDUMP_CONFIG_FILE"
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exit 1
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fi
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#Check to see if we already created key, if not, create it.
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if [ -f $KEYFILE ]; then
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echo "Using existing keys..."
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else
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echo -n "Generating new ssh keys... "
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/usr/bin/ssh-keygen -t rsa -f /root/.ssh/kdump_id_rsa -N "" 2>&1 > /dev/null
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/usr/bin/ssh-keygen -t rsa -f $KEYFILE -N "" 2>&1 > /dev/null
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echo "done."
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fi
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@ -216,11 +249,11 @@ function propagate_ssh_key()
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fi
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#now find the target ssh user and server to contact.
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SSH_USER=`echo $SSH_TARGET | cut -d\ -f2 | cut -d@ -f1`
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SSH_SERVER=`echo $SSH_TARGET | sed -e's/\(.*@\)\(.*$\)/\2/'`
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SSH_USER=`echo $DUMP_TARGET | cut -d\ -f2 | cut -d@ -f1`
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SSH_SERVER=`echo $DUMP_TARGET | sed -e's/\(.*@\)\(.*$\)/\2/'`
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#now send the found key to the found server
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ssh-copy-id -i $KEYFILE $SSH_USER@$SSH_SERVER &>/dev/null
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ssh-copy-id -i $KEYFILE $SSH_USER@$SSH_SERVER
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RET=$?
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if [ $RET == 0 ]; then
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echo $KEYFILE has been added to ~$SSH_USER/.ssh/authorized_keys on $SSH_SERVER
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@ -262,6 +295,9 @@ function start()
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return 0
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fi
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fi
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check_ssh_config && check_ssh_target
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check_config
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if [ $? != 0 ]; then
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echo -n "Starting kdump:"; echo
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@ -1,6 +1,6 @@
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Name: kexec-tools
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Version: 2.0.3
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Release: 38%{?dist}
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Release: 39%{?dist}
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License: GPLv2
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Group: Applications/System
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Summary: The kexec/kdump userspace component.
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@ -287,6 +287,9 @@ done
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%changelog
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* Wed Feb 22 2012 Dave Young <ruyang@redhat.com> - 2.0.2-39
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- Add ssh dump support, resolve bug 789253.
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* Fri Jan 27 2012 Cong Wang <xiyou.wangcong@gmail.com> - 2.0.2-38
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- Pull the latest makedumpfile release, 1.4.2.
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13
mkdumprd
13
mkdumprd
@ -9,6 +9,7 @@
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export IN_KDUMP=1
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conf_file="/etc/kdump.conf"
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SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
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extra_modules=""
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dracut_args=("-m" "kdumpbase" "--add" "dash" "--add" "fstab-sys" "--add" "kernel-modules" "-c" "/dev/null" "-I" "/sbin/makedumpfile")
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@ -28,6 +29,10 @@ add_dracut_mount() {
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add_dracut_arg "--mount" "$1"
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}
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add_dracut_sshkey() {
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add_dracut_arg "--sshkey" "$1"
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}
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while [ $# -gt 0 ]; do
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case $1 in
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-d)
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@ -94,6 +99,13 @@ add_mount() {
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add_dracut_mount "$(to_mount "$(get_rootdev)")"
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if [ -n "$conf_file" ]; then
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# firstly get right SSH_KEY_LOCATION
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keyfile=$(awk '/sshkey/ {print $2}' $conf_file)
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if [ -f "$keyfile" ]; then
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# canonicalize the path
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SSH_KEY_LOCATION=$(/usr/bin/readlink -m $keyfile)
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fi
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while read config_opt config_val;
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do
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case "$config_opt" in
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@ -115,6 +127,7 @@ if [ -n "$conf_file" ]; then
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if strstr "$config_val" "@";
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then
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add_dracut_module "ssh-client"
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add_dracut_sshkey "$SSH_KEY_LOCATION"
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else
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add_dracut_module "nfs"
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add_mount "$config_val"
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