repo-backup-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: repo-backup-script-cm
data:
  backup.sh: |
    #!/bin/sh

    readonly GITHUB_REPO="$( echo $1 | tr '[:upper:]' '[:lower:]' )"
    readonly GCS_BUCKET="$( echo $2 | tr '[:upper:]' '[:lower:]' )"

    GITHUB_REPO_NAME="$(echo $GITHUB_REPO | cut -d '/' -f 2)"

    errorcode=0

    err() {
      echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $*" >&2
    }

    log() {
      echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $*"
    }

    configure_git() {
      log "Configuring git locally"
      mkdir /root/.ssh
      touch /root/.ssh/known_hosts
      cp /data/deploy-key/id_rsa /root/.ssh/id_rsa
      ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
      log "Git successfully configured"
    }

    clone_repo() {
        if [ -z "${GITHUB_REPO}" ]; then
        err "Repository is not set";
        exit 1
        fi

        log "Attempting to clone git repo: '${GITHUB_REPO_NAME}'"

        { # try
          git clone --depth 1 git@github.com:"${GITHUB_REPO}".git > git.log 2>&1 
        } || { # catch
          errorcode=$?
          if (($errorcode != 0)); then
            git_error=`cat git.log` 

            err "Unable to clone repo '${GITHUB_REPO_NAME}', Error code: '${errorcode}'"
            err "git clone output:"
            
            # Logging git_error as error line by line
            while IFS= read -r line;do
              err "$line"
            done <<< "$git_error"

            exit 1
          fi
        }
        if (($errorcode == 0)); then 
          log "Git repo '${GITHUB_REPO_NAME}' successfully cloned!";
        fi
    }

    copy_files_to_gcs() {
      log "Attempting to push files to bucket '${GCS_BUCKET}'"
      { # try
        gsutil -m cp -r ${GITHUB_REPO_NAME} gs://"${GCS_BUCKET}"/$(date +"%Y-%m-%d")/ 2> gsutil.log
      } || {
        errorcode=$?
        if (($errorcode != 0)); then
          # Reading last 3 lines from gsutil output for error message
          gsutil_error=`cat gsutil.log | tail -n 3` 

          err "Unable to push '${GITHUB_REPO_NAME}' to '${GCS_BUCKET}', Error code: '${errorcode}'"
          err "gsutil error output snippet:"
          
          # Logging gsutil_error as error line by line
          while IFS= read -r line;do
            err "$line"
          done <<< "$gsutil_error"

          exit 1
        fi
      }
      if (($errorcode == 0)); then 
        log "'${GITHUB_REPO_NAME}' files successfully pushed to bucket '${GCS_BUCKET}'!";
      fi
    }

    configure_git
    clone_repo
    copy_files_to_gcs