Dynamic GCP IAP SSH Tunnel

gcp_compute_instance_tunnel.sh

#!/bin/bash

## Example: ./get_gcp_compute_instance.sh hostname gcp_project_name

HOSTNAME=$1
PROJECT_ID=$2

INSTANCE_INFO=$(gcloud compute instances list \
  --filter="name:$HOSTNAME" \
  --format="value(name,zone)" \
  --project="$PROJECT_ID")

if [[ -n "$INSTANCE_INFO" ]]; then
  IFS=$'\t' read -r GCE_INSTANCE_NAME GCE_INSTANCE_ZONE <<< "$INSTANCE_INFO"
  echo "Instance Name: $GCE_INSTANCE_NAME"
  echo "Instance Zone: $GCE_INSTANCE_ZONE"
else
  echo "Instance not found."
fi

~/.config/gcloud/virtenv/bin/python3 ~/projects/google-cloud-sdk/lib/gcloud.py \
  compute start-iap-tunnel $GCE_INSTANCE_NAME \
  22 \
  --listen-on-stdin \
  --project $PROJECT_ID \
  --zone=$GCE_INSTANCE_ZONE \
  --verbosity=warning