k8s-gitlab搭建
Gitlab
官方提供了 Helm 的方式在 Kubernetes 集群中来快速安装,但是在使用的过程中发现 Helm 提供的 Chart 包中有很多其他额外的配置,所以我们这里使用自定义的方式来安装,也就是自己来定义一些资源清单文件。
Gitlab
主要涉及到3个应用:Redis、Postgresql、Gitlab 核心程序,实际上我们只要将这3个应用分别启动起来,然后加上对应的配置就可以很方便的安装 Gitlab 了,我们这里选择使用的镜像不是官方的,而是 Gitlab 容器化中使用非常多的一个第三方镜像:sameersbn/gitlab
,基本上和官方保持同步更新,地址:http://www.damagehead.com/docker-gitlab/
如果我们已经有可使用的 Redis 或 Postgresql 服务的话,那么直接配置在 Gitlab 环境变量中即可,如果没有的话就单独部署。
创建一个用于存储密码的secret文件:
创建username和password文件:
$ echo -n "admin" > ./username
$ echo -n "1f2d1e2e67df" > ./password
用kubectl生成secret对象:
$ kubectl create secret generic db-user-pass --from-file=./username --from-file=./password
secret "db-user-pass" created
创建PVC和storageclass做持久化:
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
部署需要的 Redis 服务,对应的资源清单文件如下:(gitlab-redis.yaml)
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:
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
然后是数据库 Postgresql,对应的资源清单文件如下:(gitlab-postgresql.yaml)
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.yaml
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
然后就是我们最核心的 Gitlab 的应用,对应的资源清单文件如下:(gitlab.yaml)
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
我们这里应用数据都做数据持久化,还有敏感数据用了secret引入到环境变量,
比如添加 PV/PVC 或者 StorageClass。
要注意的是其中 Redis 和 Postgresql 相关的环境变量配置,另外,我们这里添加了一个 Ingress 对象,来为我们的 Gitlab 配置一个域名git.qikqiak.com
,这样应用部署完成后,我们就可以通过该域名来访问了,然后直接部署即可:
$ kubectl create -f gitlab-redis.yaml gitlab-postgresql.yaml gitlab.yaml
创建完成后,查看 Pod 的部署状态:
$ 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
可以看到都已经部署成功了,然后我们可以通过 Ingress 中定义的域名git.qikqiak.com
(需要做 DNS 解析或者在本地 /etc/hosts 中添加映射)来访问 Portal:
gitlab portal
使用用户名 root,和部署的时候指定的超级用户密码GITLAB_ROOT_PASSWORD=admin321
即可登录进入到首页:
gitlab homepage
Gitlab 运行后,我们可以注册为新用户并创建一个项目,还可以做很多的其他系统设置,比如设置语言、设置应用风格样式等等。
点击Create a project
创建一个新的项目,和之前 Github 使用上没有多大的差别:
create gitlab project
创建完成后,我们可以添加本地用户的一个SSH-KEY
,这样我们就可以通过 SSH 来拉取或者推送代码了。SSH 公钥通常包含在~/.ssh/id_rsa.pub
文件中,并以ssh-rsa
开头。如果没有的话可以使用ssh-keygen
命令来生成,id_rsa.pub
里面的内容就是我们需要的 SSH 公钥,然后添加到 Gitlab 中。
由于平时使用的 ssh 默认是 22 端口,现在如果用默认的 22 端口去连接,是没办法和 Gitlab 容器中的 22 端口进行映射的,因为我们只是通过 Service 的 22 端口进行了映射,要想通过节点去进行 ssh 链接就需要在节点上一个端口和容器内部的22端口进行绑定,所以这里我们可以通过 NodePort 去映射 Gitlab 容器内部的22端口,比如我们将环境变量设置为GITLAB_SSH_PORT=30022
,将 Gitlab 的 Service 也设置为 NodePort 类型:
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 对应的 nodePort 端口设置为 30022,这样就不会随机生成了,重新更新下 Deployment 和 Service,更新完成后,现在我们在项目上面 Clone 的时候使用 ssh 就会带上端口号了:
gitlab ssh
现在就可以使用Clone with SSH
的地址了,由于上面我们配置了 SSH 公钥,所以就可以直接访问上面的仓库了:
$ 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.
然后随便在该项目下面添加一些资源:
$ 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
然后刷新浏览器,就可以看到刚刚创建的 Git 仓库中多了一个 README.md 的文件: