Uly.me

cloud engineer

gcloud

GCP Display Forwarding Rules

Here’s how to display a list of Google Cloud forwarding rules.

gcloud compute forwarding-rules list

If you want global only.

gcloud compute forwarding-rules --global

Or just local regions only.

gcloud compute forwarding-rules --filter="region:( us-central us-west1 )"

Google SDK Install on Debian or Ubuntu

Here’s the script.

echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] \
  https://packages.cloud.google.com/apt cloud-sdk main" | \
  sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
sudo apt-get install apt-transport-https ca-certificates
sudo curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | \
  sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
sudo apt-get update && sudo apt-get install google-cloud-sdk

GCP Start Multiple Instances

Here’s how to start multiple instances using Bash and Google SDK.

#!/bin/bash
while IFS=', ' read -r a b c; do
  instance="${a//[[:blank:]]/}"
  project="${b//[[:blank:]]/}"
  zone="${c//[[:blank:]]/}"
  echo "Starting $instance ...."
  gcloud compute instances start $instance \
  --zone $zone --project $project --async
done < instance-list.txt

Instances are read from an external file. The file format is displayed below.

server1,project1,us-central1-a
server2,project2,us-central1-b
server3,project3,us-central1-c

To stop multiple instances, replace “start” with “stop.”

GCP Check Instances Running

Here’s how to check if instances are running in GCP. 

#!/bin/bash
while IFS=', ' read -r a b c; do
  instance="${a//[[:blank:]]/}"
  project="${b//[[:blank:]]/}"
  zone="${c//[[:blank:]]/}"
  gcloud compute instances describe $instance \
  --zone $zone --project $project \
  --format='table[no-heading](name,status,zone)'
done < instance-list.txt

Instances are read from an external file. File is comma delimited with instance name, project id and zone data.

GCP Move Instance to Another Zone

Moving a GCP instance to another zone is actually much simpler than initially thought. It’s just a single gcloud command.

gcloud compute instances move instance-name \
--zone us-central1-a \
--destination-zone us-central1-b

A few details about moving to another zone.

  • VM has to be running.
  • You may get a new internal or external IP address
  • Local SSDs are ephemeral, so you can’t move them.
  • When moving between regions, you may have to select a subnetwork.
  • You may have to change GPUs available in the destination if you use them.

GCloud Interactive Shell

If you already have Google SDK installed, you can activate GCloud Interactive Shell, which is still in beta by the way, by typing the following command from the Google SDK terminal.

gcloud beta interactive

The interactive shell environment has auto-completion. It shows you who’s logged in and which project you are currently set in. To exit the interactive shell, just Press F9 to quit.