k8s-gitlab搭建

Gitlab官方提供了 Helm 的方式在 Kubernetes 集羣中來快速安裝,可是在使用的過程當中發現 Helm 提供的 Chart 包中有不少其餘額外的配置,因此咱們這裏使用自定義的方式來安裝,也就是本身來定義一些資源清單文件。node

Gitlab主要涉及到3個應用:Redis、Postgresql、Gitlab 核心程序,實際上咱們只要將這3個應用分別啓動起來,而後加上對應的配置就能夠很方便的安裝 Gitlab 了,咱們這裏選擇使用的鏡像不是官方的,而是 Gitlab 容器化中使用很是多的一個第三方鏡像:sameersbn/gitlab,基本上和官方保持同步更新,地址:http://www.damagehead.com/docker-gitlab/git

若是咱們已經有可以使用的 Redis 或 Postgresql 服務的話,那麼直接配置在 Gitlab 環境變量中便可,若是沒有的話就單獨部署。redis

建立一個用於存儲密碼的secret文件:sql

建立username和password文件:
$ echo -n "admin" > ./username $ echo -n "1f2d1e2e67df" > ./password
用kubectl生成secret對象:
$ kubectl create secret generic db-user-pass --from-file=./username --from-file=./password secret "db-user-pass" created

建立PVC和storageclass作持久化:docker

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gitlab-redis-pvc
  namespace: kube-ops
  annotations:
    volume.beta.kubernetes.io/storage-class: "gitlab-storageclass"
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Gi

 

部署須要的 Redis 服務,對應的資源清單文件以下:(gitlab-redis.yaml)shell

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: redis
  namespace: kube-ops
  labels:
    name: redis
spec:
  template:
    metadata:
      name: redis
      labels:
        name: redis
    spec:
      containers:
      - name: redis
        image: sameersbn/redis
        imagePullPolicy: IfNotPresent
        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:
          claimName: gitlab-redis-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: redis
  namespace: kube-ops
  labels:
    name: redis
spec:
  ports:
    - name: redis
      port: 6379
      targetPort: redis
  selector:
    name: redis

 

vim gitlab-postgresql-pvc.yaml:數據庫

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gitlab-postgresql-pvc
  namespace: kube-ops
  annotations:
    volume.beta.kubernetes.io/storage-class: "gitlab-storageclass"
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Gi

 

而後是數據庫 Postgresql,對應的資源清單文件以下:(gitlab-postgresql.yaml)vim

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: postgresql
  namespace: kube-ops
  labels:
    name: postgresql
spec:
  template:
    metadata:
      name: postgresql
      labels:
        name: postgresql
    spec:
      containers:
      - name: postgresql
        image: sameersbn/postgresql
        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
        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:
          claimName: gitlab-postgresql-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: postgresql
  namespace: kube-ops
  labels:
    name: postgresql
spec:
  ports:
    - name: postgres
      port: 5432
      targetPort: postgres
  selector:
    name: postgresql

vim gitlab-pvc.yamlapi

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gitlab-pvc
  namespace: kube-ops
  annotations:
    volume.beta.kubernetes.io/storage-class: "gitlab-storageclass"
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Gi

 

 

而後就是咱們最核心的 Gitlab 的應用,對應的資源清單文件以下:(gitlab.yaml)瀏覽器

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: gitlab
  namespace: kube-ops
  labels:
    name: gitlab
spec:
  template:
    metadata:
      name: gitlab
      labels:
        name: gitlab
    spec:
      containers:
      - name: gitlab
        image: sameersbn/gitlab:12.1.6
        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
          valueFrom:
            secretKeyRef:
              name: git-user-pass
              key: password
          # value: admin321
        - name: GITLAB_ROOT_EMAIL
          value: 1369472116@qq.com
        - name: GITLAB_HOST
          value: gitlab.fuyuteng.com
        - name: GITLAB_PORT
          value: "80"
        - name: GITLAB_SSH_PORT
          value: "30022"
        - 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
        livenessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 180
          timeoutSeconds: 5
        readinessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 5
          timeoutSeconds: 1
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: gitlab-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: gitlab
  namespace: kube-ops
  labels:
    name: gitlab
spec:
  ports:
    - name: http
      port: 80
      targetPort: http
    - name: ssh
      port: 22
      targetPort: ssh
      nodePort: 30022
  type: NodePort
  selector:
    name: gitlab

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: gitlab
  namespace: kube-ops
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: gitlab.fuyuteng.com
    http:
      paths:
      - backend:
          serviceName: gitlab
          servicePort: http


咱們這裏應用數據都作數據持久化,還有敏感數據用了secret引入到環境變量,好比添加 PV/PVC 或者 StorageClass。

要注意的是其中 Redis 和 Postgresql 相關的環境變量配置,另外,咱們這裏添加了一個 Ingress 對象,來爲咱們的 Gitlab 配置一個域名git.qikqiak.com,這樣應用部署完成後,咱們就能夠經過該域名來訪問了,而後直接部署便可:

$ kubectl create -f gitlab-redis.yaml gitlab-postgresql.yaml gitlab.yaml

建立完成後,查看 Pod 的部署狀態:

$ kubectl get pods -n kube-ops
NAME                                           READY     STATUS    RESTARTS   AGE
gitlab-7d855554cb-twh7c                        1/1       Running   0          10m
postgresql-8566bb959c-2tnvr                    1/1       Running   0          17h
redis-8446f57bdf-4v62p                         1/1       Running   0          17h

能夠看到都已經部署成功了,而後咱們能夠經過 Ingress 中定義的域名git.qikqiak.com(須要作 DNS 解析或者在本地 /etc/hosts 中添加映射)來訪問 Portal:

gitlab portalgitlab portal

使用用戶名 root,和部署的時候指定的超級用戶密碼GITLAB_ROOT_PASSWORD=admin321便可登陸進入到首頁:

gitlab homepagegitlab homepage

Gitlab 運行後,咱們能夠註冊爲新用戶並建立一個項目,還能夠作不少的其餘系統設置,好比設置語言、設置應用風格樣式等等。

點擊Create a project建立一個新的項目,和以前 Github 使用上沒有多大的差異:

create gitlab projectcreate gitlab project

建立完成後,咱們能夠添加本地用戶的一個SSH-KEY,這樣咱們就能夠經過 SSH 來拉取或者推送代碼了。SSH 公鑰一般包含在~/.ssh/id_rsa.pub 文件中,並以ssh-rsa開頭。若是沒有的話可使用ssh-keygen命令來生成,id_rsa.pub裏面的內容就是咱們須要的 SSH 公鑰,而後添加到 Gitlab 中。

因爲平時使用的 ssh 默認是 22 端口,如今若是用默認的 22 端口去鏈接,是沒辦法和 Gitlab 容器中的 22 端口進行映射的,由於咱們只是經過 Service 的 22 端口進行了映射,要想經過節點去進行 ssh 連接就須要在節點上一個端口和容器內部的22端口進行綁定,因此這裏咱們能夠經過 NodePort 去映射 Gitlab 容器內部的22端口,好比咱們將環境變量設置爲GITLAB_SSH_PORT=30022,將 Gitlab 的 Service 也設置爲 NodePort 類型:

apiVersion: v1 kind: Service metadata: name: gitlab namespace: kube-ops labels: name: gitlab spec: ports: - name: http port: 80 targetPort: http - name: ssh port: 22 targetPort: ssh nodePort: 30022 type: NodePort selector: name: gitlab 

注意上面 ssh 對應的 nodePort 端口設置爲 30022,這樣就不會隨機生成了,從新更新下 Deployment 和 Service,更新完成後,如今咱們在項目上面 Clone 的時候使用 ssh 就會帶上端口號了:

gitlab sshgitlab ssh

如今就可使用Clone with SSH的地址了,因爲上面咱們配置了 SSH 公鑰,因此就能夠直接訪問上面的倉庫了:

$ git clone ssh://git@git.qikqiak.com:30022/root/gitlab-demo.git Cloning into 'gitlab-demo'... warning: You appear to have cloned an empty repository. Checking connectivity... done. 

而後隨便在該項目下面添加一些資源:

$ echo "# hello world" > README.md $ git add . $ git commit -m 'hello world' [master (root-commit) 63de7cb] hello world 1 file changed, 1 insertion(+) create mode 100644 README.md $ git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 224 bytes | 0 bytes/s, done. Total 3 (delta 0), reused 0 (delta 0) To ssh://git@git.qikqiak.com:30022/root/gitlab-demo.git * [new branch] master -> master 

而後刷新瀏覽器,就能夠看到剛剛建立的 Git 倉庫中多了一個 README.md 的文件:

git commit

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