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Create .ssh config to remotely access GCE instance
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| #!/bin/bash | |
| # Get instance name as an argument or use demo-instance as default | |
| INSTANCE_NAME=${1:-demo-instance} | |
| # Get zone as an argument or use us-west4-b as default | |
| ZONE=${2:-us-west4-b} | |
| # Location of Private Key created during authentication | |
| PRIVATE_KEY_PATH=~/.ssh/google_compute_engine | |
| # Check if the instance is running | |
| INSTANCE_STATUS=$(gcloud compute instances describe $INSTANCE_NAME --zone=$ZONE --format='get(status)') | |
| # If the instance is not running, tell the user to start the instance first and exit the script | |
| if [ "$INSTANCE_STATUS" != "RUNNING" ]; then | |
| echo "Instance $INSTANCE_NAME is not running. Please start the instance first." | |
| exit 1 | |
| fi | |
| # Get the public IP address of the instance | |
| PUBLIC_IP=$(gcloud compute instances describe $INSTANCE_NAME --zone=$ZONE --format='get(networkInterfaces[0].accessConfigs[0].natIP)') | |
| # Get the username of the instance | |
| USERNAME=$(gcloud compute ssh $INSTANCE_NAME --zone $ZONE --dry-run | awk -F'[@ ]' '{print $(NF-1)}') | |
| # Ensure .ssh key is added to project metadata by logging in to the instance and running a command | |
| gcloud compute ssh $INSTANCE_NAME --zone $ZONE --command "echo 'Hello from $INSTANCE_NAME.'" | |
| echo "Public IP: $PUBLIC_IP" | |
| echo "Username: $USERNAME" | |
| echo "Identity file: $PRIVATE_KEY_PATH" | |
| # Append config to .ssh/config | |
| cat << EOF >> ~/.ssh/config | |
| Host $PUBLIC_IP | |
| HostName $PUBLIC_IP | |
| IdentityFile $PRIVATE_KEY_PATH | |
| User $USERNAME | |
| EOF | |
| # ALTERNATIVE TO CONFIG CREATION: SSH into the instance | |
| # ssh -i $PRIVATE_KEY_PATH $USERNAME@$PUBLIC_IP |
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