CODEWITHSUNDEEP
linuxbashshell
WebQube
WebQube

Reputation: 8961

linux output grep an internal ip by hostname

my question concerning a linux output : using gcloud to list my vm instances :

HOSTNAME="chef-production2-doctor-simulator01"
gcloud compute instances list |grep $HOSTNAME
chef-production2-doctor-simulator01 us-central1-b n1-standard-1                         10.128.0.2  x.x.x.x   RUNNING

how can I grep the internal ip and output it to a bash variable?

INTERNAL_IP="$(gcloud compute instances list |grep $HOSTNAME)"

Upvotes: 1

Views: 315

Answers (2)

Daniel
Daniel

Reputation: 783

You could try it like thie:

var INTERNAL_IP="$(gcloud compute instances list | grep chef-production2-doctor-simulator01 | tr -s "  " | cut -d ' ' -f4)"

The tr -s " " deletes all double spaces The cut -d ' ' -f4 cuts out the ip

or as anony mentioned (which is better):

var INTERNAL_IP="$(gcloud compute instances list | awk '/chef-production2-doctor-simulator01/ { print $4 }'")

Upvotes: 0

Has QUIT--Anony-Mousse
Has QUIT--Anony-Mousse

Reputation: 77454

The popular tools for selecting a column are: cut, sed and awk. And of course, perl.

awk often is the shortest solution, but you will have to learn it's syntax.

gcloud compute instances list | \
awk '/chef-production2-doctor-simulator01/ { print $2 }'

may be what you are looking for. You may need to be explicit about separators. It's hard to tell which separators were used in the example you showed above.

Upvotes: 2

Related Questions