GitLab setup for Kubernetes

GitLab is the first single application built from the ground up for all stages of the DevOps lifecycle for Product, Development, QA, Security, and Operations teams to work concurrently on the same project. GitLab enables teams to collaborate and work from a single conversation, instead of managing multiple threads across different tools. GitLab provides teams with a single data store, one user interface, and one permission model across the DevOps lifecycle allowing teams to collaborate, significantly reducing cycle time and focus exclusively on building great software quickly.

Here is a quick Tutorial that will teach you how to deploy Gitlab within Kubernetes Environment.

Requirements:

1. Working Kubernetes Cluster

2. Storage Class: We will use it for stateful deployment.

Here Git repository that I used to build Gitlab.

#Clone gitlab_k8s repo

git clone https://github.com/jaganthoutam/gitlab_k8s.git

cd gitlab_k8s

gitlab-pvc.yaml Contains the pv,pvc voulmes for postgres,gitlab,redis..

Here I am using my NFS(nfs01.thoutam.loc) server…

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-gitlab
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 20Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-gitlab
spec:
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: nfs01.thoutam.loc
    # Exported path of your NFS server
    path: "/mnt/gitlab"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-gitlab-post
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 20Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-gitlab-post
spec:
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: nfs01.thoutam.loc
    # Exported path of your NFS server
    path: "/mnt/gitlab-post"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-gitlab-redis
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 20Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-gitlab-redis
spec:
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: nfs01.thoutam.loc
    # Exported path of your NFS server
    path: "/mnt/gitlab-redis"
---

You can use other storage classes based on your cloud Providers.

gitlab-rc.yml Contains Gitlab Deployment config:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: gitlab
spec:
  replicas: 1
#  selector:
#    name: gitlab
  template:
    metadata:
      name: gitlab
      labels:
        name: gitlab
    spec:
      containers:
      - name: gitlab
        image: jaganthoutam/gitlab:11.1.4
        env:
        - name: TZ
          value: Asia/Kolkata
        - name: GITLAB_TIMEZONE
          value: Kolkata

        - name: GITLAB_SECRETS_DB_KEY_BASE
          value: long-and-random-alpha-numeric-string  #CHANGE ME
        - name: GITLAB_SECRETS_SECRET_KEY_BASE
          value: long-and-random-alpha-numeric-string #CHANGE ME
        - name: GITLAB_SECRETS_OTP_KEY_BASE
          value: long-and-random-alpha-numeric-string #CHANGE ME


        - name: GITLAB_ROOT_PASSWORD
          value: password               #CHANGE ME
        - name: GITLAB_ROOT_EMAIL
          value: [email protected]        #CHANGE ME

        - name: GITLAB_HOST
          value: gitlab.lb.thoutam.loc  #CHANGE ME
        - name: GITLAB_PORT
          value: "80"
        - name: GITLAB_SSH_PORT
          value: "22"

        - name: GITLAB_NOTIFY_ON_BROKEN_BUILDS
          value: "true"
        - name: GITLAB_NOTIFY_PUSHER
          value: "false"

        - name: GITLAB_BACKUP_SCHEDULE
          value: daily
        - name: GITLAB_BACKUP_TIME
          value: 01:00

        - name: DB_TYPE
          value: postgres
        - name: DB_HOST
          value: postgresql
        - name: DB_PORT
          value: "5432"
        - name: DB_USER
          value: gitlab
        - name: DB_PASS
          value: passw0rd
        - name: DB_NAME
          value: gitlab_production

        - name: REDIS_HOST
          value: redis
        - name: REDIS_PORT
          value: "6379"

        - name: SMTP_ENABLED
          value: "false"
        - name: SMTP_DOMAIN
          value: www.example.com
        - name: SMTP_HOST
          value: smtp.gmail.com
        - name: SMTP_PORT
          value: "587"
        - name: SMTP_USER
          value: [email protected]
        - name: SMTP_PASS
          value: password
        - name: SMTP_STARTTLS
          value: "true"
        - name: SMTP_AUTHENTICATION
          value: login

        - name: IMAP_ENABLED
          value: "false"
        - name: IMAP_HOST
          value: imap.gmail.com
        - name: IMAP_PORT
          value: "993"
        - name: IMAP_USER
          value: [email protected]
        - name: IMAP_PASS
          value: password
        - name: IMAP_SSL
          value: "true"
        - name: IMAP_STARTTLS
          value: "false"
        ports:
        - name: http
          containerPort: 80
        - name: ssh
          containerPort: 22
        volumeMounts:
        - mountPath: /home/git/data
          name: data
        livenessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 180
          timeoutSeconds: 5
        readinessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 5
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
#NFS PVC name identifier
          claimName: nfs-gitlab

gitlab-svc.yml contains the gitlab services. I used 80,20 default ports.

apiVersion: v1
kind: Service
metadata:
  name: gitlab
  labels:
    name: gitlab
spec:
  type: NodePort
  ports:
    - name: http
      port: 80
      targetPort: http
    - name: ssh
      port: 22
      targetPort: ssh
  selector:
    name: gitlab

postgresql-rc.yml   Contains Postgres ReplicationController config :

apiVersion: v1
kind: ReplicationController
metadata:
  name: postgresql
spec:
  replicas: 1
  selector:
    name: postgresql
  template:
    metadata:
      name: postgresql
      labels:
        name: postgresql
    spec:
      containers:
      - name: postgresql
        image: jaganthoutam/postgresql:10
        env:
        - name: DB_USER
          value: gitlab
        - name: DB_PASS
          value: passw0rd
        - name: DB_NAME
          value: gitlab_production
        - name: DB_EXTENSION
          value: pg_trgm
        ports:
        - name: postgres
          containerPort: 5432
        volumeMounts:
        - mountPath: /var/lib/postgresql
          name: data
        livenessProbe:
          exec:
            command:
            - pg_isready
            - -h
            - localhost
            - -U
            - postgres
          initialDelaySeconds: 30
          timeoutSeconds: 5
        readinessProbe:
          exec:
            command:
            - pg_isready
            - -h
            - localhost
            - -U
            - postgres
          initialDelaySeconds: 5
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
# NFS PVC identifier
          claimName: nfs-gitlab-post

postgresql-svc.yml contains postgres service config :

apiVersion: v1
kind: Service
metadata:
  name: postgresql
  labels:
    name: postgresql
spec:
  ports:
    - name: postgres
      port: 5432
      targetPort: postgres
  selector:
    name: postgresql

redis-rc.yml contains redis ReplicationController config:

apiVersion: v1
kind: ReplicationController
metadata:
  name: redis
spec:
  replicas: 1
  selector:
    name: redis
  template:
    metadata:
      name: redis
      labels:
        name: redis
    spec:
      containers:
      - name: redis
        image: jaganthoutam/redis
        ports:
        - name: redis
          containerPort: 6379
        volumeMounts:
        - mountPath: /var/lib/redis
          name: data
        livenessProbe:
          exec:
            command:
            - redis-cli
            - ping
          initialDelaySeconds: 30
          timeoutSeconds: 5
        readinessProbe:
          exec:
            command:
            - redis-cli
            - ping
          initialDelaySeconds: 5
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
#NFS PVC identifier
          claimName: nfs-gitlab-redis

redis-svc.yml contain redis service config:

apiVersion: v1
kind: Service
metadata:
  name: redis
  labels:
    name: redis
spec:
  ports:
    - name: redis
      port: 6379
      targetPort: redis
  selector:
    name: redis

Change the configuration according to your needs and apply using kubectl.

kubectly apply -f .


#and check if your pods are running or not.

[email protected]:~# kubectl get po
NAME                        READY     STATUS    RESTARTS   AGE
gitlab-589cb45ff4-hch2g     1/1       Running   1          1d
postgres-55f6bcbb99-4x48g   1/1       Running   3          1d
postgresql-v2svn            1/1       Running   4          1d
redis-7r486                 1/1       Running   2          1d

Let me know if this helps you.

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