Kubernetes CronJob that runs a Team City backup

teamcity-backup-cronjob.yaml

kind: CronJob
apiVersion: batch/v1beta1
metadata:
  name: teamcity-server-backup
  labels:
    app: teamcity
    type: cron

spec:
  schedule: "30 10,20 * * 1-5" # Every weekday at 10:30, and 20:30 UTC
  jobTemplate:
    metadata:
      labels:
        app: teamcity
        type: cron
    spec:
      template:
        spec:
          restartPolicy: Never
          affinity:
            podAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                - labelSelector:
                    matchExpressions:
                    - key: app
                      operator: In
                      values:
                      - teamcity
                    - key: type
                      operator: In
                      values:
                      - server
                  topologyKey: kubernetes.io/hostname
          containers:
            - name: backup-worker
              image: byrnedo/alpine-curl:0.1.3
              imagePullPolicy: IfNotPresent
              env:
                - name: ADMIN_USERNAME
                  value: "backupper"
                - name: ADMIN_PASSWORD
                  value: "password"
              volumeMounts:
                - name: teamcity-datadir
                  mountPath: /datadir
                - name: teamcity-backup
                  mountPath: /backups
              command:
              - "/bin/sh"
              - "-ec"
              - |
                set -o nounset
                set -o errexit

                echo "Starting backup"
                curl -s -X POST --basic --user ${ADMIN_USERNAME}:${ADMIN_PASSWORD} "https://build.example.com/app/rest/server/backup?includeConfigs=true&includeDatabase=true&includeBuildLogs=false&fileName=CronJobTeamCityBackup"

                echo
                # Wait for backup to complete
                while : ;
                do
                    STATUS=$(curl -s --basic --user ${ADMIN_USERNAME}:${ADMIN_PASSWORD} https://build.example.com/app/rest/server/backup)
                    echo "$(date) Backup is ${STATUS}"
                    [[ "${STATUS}" = "Running" ]] && sleep 60s || break
                done

                cd /datadir/backup
                BACKUP=$(ls -t | head -1)
                cp ${BACKUP} /backups

                cd /backups
                ls -ltd * | head -1

                echo "BACKUP COMPLETE"
                echo
          volumes:
            - name: teamcity-datadir
              persistentVolumeClaim:
                claimName: teamcity-server-pv-claim
            - name: teamcity-backup
              persistentVolumeClaim:
                claimName: teamcity-backup-pv-claim

Read more at https://medium.com/@nieldw/using-a-kubernetes-cronjob-the-team-city-api-to-trigger-a-regular-backup-17dfb076d83a