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dracut-module-setup.sh: improve get_alias() 

In /etc/hosts, the alias name can come at the 2nd column, regardless of the
recommendation.

E.g. the following format is valid although not recommended
cat /etc/hosts
        127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
        ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
        192.168.22.21	fastvm-rhel-7-6-21	fastvm-rhel-7-6-21.localdomain
        192.168.22.22	fastvm-rhel-7-6-22	fastvm-rhel-7-6-22.localdomain

        192.168.22.21   node1_hb
        192.168.22.22   node2_hb

So filtering out both 2nd and 3rd column for matching.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
This commit is contained in:
Pingfan Liu 2020-03-13 11:05:49 +08:00 committed by Kairui Song
parent 4b43ba063d
commit 3be5f74df0
1 changed files with 2 additions and 1 deletions
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3
dracut-module-setup.sh
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@ -683,7 +683,8 @@ get_alias() {
ips=$(hostname -I)
for ip in $ips
do
entries=$(grep $ip /etc/hosts | awk '{ $1=$2=""; print $0 }')
# in /etc/hosts, alias can come at the 2nd column
entries=$(grep $ip /etc/hosts | awk '{ $1=""; print $0 }')
if [ $? -eq 0 ]; then
alias_set="$alias_set $entries"
fi