Bash script to automatically rollback to the last successful pipeline, by re-running the deployment job of it. Should be run with sufficient time after the previous jobs to make sure the check can properly know if the startup failed or not.

gitlab-free-rollback-on-issues.sh

#!/bin/bash

if curl --output /dev/null --silent --head --fail "http://127.0.0.1:80"; then
	echo "Website appears to be available"
else
	echo "Website not available, initiating rollback"

	LASTSUCCESSPIPELINE=$(curl -k --silent --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" "https://gitlab.example.com/api/v4/projects/1/pipelines?status=success&scope=finished" | jq '.[0].id')
	if [ -z "$LASTSUCCESSPIPELINE" ]; then
		echo "Cannot get last pipeline id"
		exit 1
	fi
	echo "Rolling back to pipeline id $LASTSUCCESSPIPELINE"
	
	# Change name of job name in the line below
	RETRYJOBID=$(curl -k --silent --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" "https://gitlab.example.com/api/v4/projects/1/pipelines/$LASTSUCCESSPIPELINE/jobs" | jq '.[] | select(.name == "deploy") | .id')
	if [ -z "$LASTSUCCESSPIPELINE" ]; then
		echo "Cannot get job of this pipeline to retry"
		exit 1
	fi
	echo "Retrying job id $RETRYJOBID"
	
	curl -k --silent --request POST --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" "https://gitlab.example.com/api/v4/projects/1/jobs/$RETRYJOBID/retry" 2>/dev/null
fi