步骤：

1.创建namsepace

kubectl create namespace gitlab

2.安装redis

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis
  namespace: gitlab
  labels:
    name: redis
spec:
  selector:
    matchLabels:
      name: redis
  template:
    metadata:
      name: redis
      labels:
        name: redis
    spec:
      containers:
      - name: redis
        image: sameersbn/redis:4.0.9-2
        imagePullPolicy: IfNotPresent
        ports:
        - name: redis
          containerPort: 6379
        volumeMounts:
        - mountPath: /var/lib/redis
          name: data
      volumes:
      - name: data
        emptyDir: {}        #hostpath:#path: /path/to/directory-on-host
---
apiVersion: v1
kind: Service
metadata:
  name: redis
  namespace: gitlab
  labels:
    name: redis
spec:
  ports:
    - name: redis
      port: 6379
      targetPort: redis
  selector:
    name: redis

redis使用临时卷，随着pod创建，销毁

3.安装Postgresql

apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-pv-postgresql
  labels:
    name: gitlab-pv-postgresql
spec:
  storageClassName: local  # Local PV
  capacity:
    storage: 20Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  local:  
    path: /data/postgresql/
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - node2
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gitlab-pvc-postgresql
  namespace: gitlab
spec:
  storageClassName: local
  selector:
    matchLabels:
      name: gitlab-pv-postgresql
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgresql
  namespace: gitlab
  labels:
    name: postgresql
spec:
  selector:
    matchLabels:
      name: postgresql
  template:
    metadata:
      name: postgresql
      labels:
        name: postgresql
    spec:
      containers:
      - name: postgresql
        image: sameersbn/postgresql:10-2
        imagePullPolicy: IfNotPresent
        env:
        - name: DB_USER
          value: gitlab
        - name: DB_PASS
          value: passw0rd
        - name: DB_NAME
          value: gitlab_production
        - name: DB_EXTENSION
          value: pg_trgm
        - name: USERMAP_UID
          value: "999"
        - name: USERMAP_GID
          value: "999"
        ports:
        - name: postgres
          containerPort: 5432
        volumeMounts:
        - mountPath: /var/lib/postgresql
          name: data
        readinessProbe:
          exec:
            command:
            - pg_isready
            - -h
            - localhost
            - -U
            - postgres
          initialDelaySeconds: 30
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: gitlab-pvc-postgresql
---
apiVersion: v1
kind: Service
metadata:
  name: postgresql
  namespace: gitlab
  labels:
    name: postgresql
spec:
  ports:
    - name: postgres
      port: 5432
      targetPort: postgres
  selector:
    name: postgresql

先在node2主机上生成/data/postgresql/
postgrelsql使用pv存储，并且绑定了主机 标签为node2

4.安装gitlab

apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-pv
  labels:
    name: gitlab-pv
spec:
  storageClassName: local  # Local PV
  capacity:
    storage: 20Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  local:  
    path: /data/gitlab/
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - node2
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gitlab-pvc
  namespace: gitlab
spec:
  storageClassName: local
  selector:
        matchLabels:
          name: gitlab-pv
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: gitlab
  namespace: gitlab
  labels:
    name: gitlab
spec:
  selector:
    matchLabels:
      name: gitlab
  template:
    metadata:
      name: gitlab
      labels:
        name: gitlab
    spec:
      initContainers:
      - name: fix-permissions
        image: busybox
        command: ["sh", "-c", "chown -R 1000:1000 /home/git/data"]
        securityContext:
          privileged: true
        volumeMounts:
        - name: data
          mountPath: /home/git/data
      containers:
      - name: gitlab
        image: sameersbn/gitlab:12.9.5
        imagePullPolicy: IfNotPresent
        env:
        - name: TZ
          value: Asia/Shanghai
        - name: GITLAB_TIMEZONE
          value: Beijing
        - name: GITLAB_SECRETS_DB_KEY_BASE
          value: long-and-random-alpha-numeric-string
        - name: GITLAB_SECRETS_SECRET_KEY_BASE
          value: long-and-random-alpha-numeric-string
        - name: GITLAB_SECRETS_OTP_KEY_BASE
          value: long-and-random-alpha-numeric-string
        - name: GITLAB_ROOT_PASSWORD
          value: admin321
        - name: GITLAB_ROOT_EMAIL
          value: youremail.com
        - name: GITLAB_HOST
          value: git.k8s.local
        - 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"
        ports:
        - name: http
          containerPort: 80
        - name: ssh
          containerPort: 22
        volumeMounts:
        - mountPath: /home/git/data
          name: data
        readinessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 60
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: gitlab-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: gitlab
  namespace: gitlab
  labels:
    name: gitlab
spec:
  ports:
    - name: http
      port: 80
      targetPort: http
    - name: ssh
      port: 22
      targetPort: ssh
  selector:
    name: gitlab
---
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
  name: gitlab-ingress
  namespace: gitlab
  annotations:
    kubesphere.io/creator: admin
spec:
  ingressClassName: nginx
  rules:
    - host: git.k8s.local
      http:
        paths:
          - path: /
            pathType: ImplementationSpecific
            backend:
              service:
                name: gitlab
                port:
                  number: 80

先在node2主机上生成/data/postgresql/
使用pv存储，并且绑定了主机 标签为node2

5.改hosts

访问http://git.k8s.local:31074/即可 其中31074是ingress的service