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Use the same /etc/resolve.conf in kdump initrd if it's managed manually

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Resolves: https://issues.redhat.com/browse/RHEL-11897

Previously fix 0177e248 ("Use the same /etc/resolve.conf in kdump initrd
if it's managed manually") is problematic,
   1) it generated .conf file unrecognized by NetowrkManager ;
   2) this .conf file was installed to current file system instead of to the kdump initrd;
   3) this incorrect .conf file prevented the starting of NetworkManager.

This patch fixes the above issues and also suppresses a harmless warning
when systemd-resolved.service doesn't exist,

    # systemctl -q is-enabled systemd-resolved
    Failed to get unit file state for systemd-resolved.service: No such file or directory

Fixes: 0177e248 ("Use the same /etc/resolve.conf in kdump initrd if it's managed manually")
Reported-by: Jie Li <jieli@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Reviewed-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Coiby Xu 2023-12-26 11:17:29 +08:00
parent c752cbb2d3
commit 38d9990389
1 changed files with 2 additions and 2 deletions
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4
dracut-module-setup.sh
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@ -583,10 +583,10 @@ kdump_install_resolv_conf() {
#
# [1] https://bugzilla.gnome.org/show_bug.cgi?id=690404
# [2] https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/manually-configuring-the-etc-resolv-conf-file_configuring-and-managing-networking
systemctl -q is-enabled systemd-resolved && return 0
systemctl -q is-enabled systemd-resolved 2> /dev/null && return 0
inst "$_resolv_conf"
if NetworkManager --print-config | grep -qs "^dns=none"; then
echo "[main]\ndns=none" > "$_nm_conf_dir"/90-dns-none.conf
printf "[main]\ndns=none\n" > "${initdir}/${_nm_conf_dir}"/90-dns-none.conf
fi
}