helm部署gitlab-包含完整Chart

ゝ一世哀愁。 2023-02-19 03:27 27阅读 0赞

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什么是storageclass？

1.storageclass（存储类）概念

storageclass是一个存储类，k8s集群管理员通过创建storageclass可以动态生成一个存储卷供k8s用户使用。

2.storageclass资源定义

每个StorageClass都包含字段provisioner，parameters和reclaimPolicy，当需要动态配置属于该类的PersistentVolume时使用这些字段。

StorageClass对象的名称很重要，是用户可以请求特定类的方式。管理员在首次创建StorageClass对象时设置类的名称和其他参数，并且在创建对象后无法更新这些对象。

管理员可以为不请求任何特定类绑定的PVC指定默认的StorageClass

（1）yaml文件示例说明：

apiVersion: storage.k8s.io/v1
    kind: StorageClass
    metadata:
      name: standard
    provisioner: kubernetes.io/aws-ebs
    parameters:
      type: gp2
    reclaimPolicy: Retain
    mountOptions:
      - debug
    volumeBindingMode: Immediate

（2）Provisioner

storageclass需要有一个供应者，用来确定我们使用什么样的存储来创建pv

常见的provisioner供应者如下：

![format_png][]

provisioner既可以是内部供应程序，也可以由外部供应商提供，如果是外部供应商可以参考https://github.com/kubernetes-incubator/external-storage/下提供的方法创建storageclass的provisioner，例如，NFS不提供内部配置程序，但可以使用外部配置程序。一些外部供应商列在存储库https://github.com/kubernetes-incubator/external-storage下。

nfs的provisioner：

https://github.com/kubernetes-incubator/external-storage/tree/master/nfs/deploy/kubernetes

Reclaim Policy

由存储类动态创建持久化存储卷（pv）时可以指定reclaimPolicy字段，这个字段中指定的回收策略可以是Delete或Retain。如果在创建StorageClass对象时未指定reclaimPolicy，则默认为Delete。

Mount Options（挂载选项）

如果Volume Plugin不支持这个挂载选项，但是指定了，就会使provisioner创建失败

Volume Binding Mode

这个字段用来说明什么时候进行卷绑定和动态配置；

默认情况下，立即模式表示一旦创建了PersistentVolumeClaim，就会发生卷绑定和动态配置。对于受拓扑约束且无法从群集中的所有节点全局访问的存储后端，将在不知道Pod的调度要求的情况下绑定或配置PersistentVolumes。这可能导致不可调度的Pod。

集群管理员可以通过指定WaitForFirstConsumer模式来解决此问题，该模式将延迟绑定和配置PersistentVolume，直到创建使用PersistentVolumeClaim的Pod。将根据Pod的调度约束指定的拓扑选择或配置PersistentVolumes。这些包括但不限于资源需求，节点选择器，pod亲和力和反亲和力，以及污点和容忍度。

通过nfs实现存储类的动态供给

1.安装nfs服务

选择自己的任意一台机器，我选择k8s的master1节点，对应的机器ip是192.168.0.6，在192.168.0.6上执行如下步骤，大家在自己环境找一台k8s节点的机器安装就可以了~

（1）yum安装nfs

yum install nfs-utils -y

systemctl start nfs

chkconfig nfs on

（2）在master1上创建一个nfs共享目录

mkdir  /data/nfs\_pro   -p

\#修改/etc/exports文件，把刚才生成的共享目录添加到这个文件里

cat  /etc/exports

/data/nfs\_pro    192.168.0.0/24(rw,no\_root\_squash)

让刚才配置文件生效

exportfs -arv

systemctl restart nfs

（3）k8s的各个node节点也需要安装nfs

yum install nfs-utils -y

systemctl start nfs

chkconfig nfs on

2.创建运行nfs-provisioner的sa账号

cat  serviceaccount.yaml

apiVersion: v1
    kind: ServiceAccount
    metadata:
      name: nfs-provisioner

通过kubectl更新yaml文件

kubectl apply -f serviceaccount.yaml

3.对sa账号做rbac授权

cat service-rbac.yaml

kind: ClusterRole
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: nfs-provisioner-runner
    rules:
      - apiGroups: [""]
        resources: ["persistentvolumes"]
        verbs: ["get", "list", "watch", "create", "delete"]
      - apiGroups: [""]
        resources: ["persistentvolumeclaims"]
        verbs: ["get", "list", "watch", "update"]
      - apiGroups: ["storage.k8s.io"]
        resources: ["storageclasses"]
        verbs: ["get", "list", "watch"]
      - apiGroups: [""]
        resources: ["events"]
        verbs: ["create", "update", "patch"]
      - apiGroups: [""]
        resources: ["services", "endpoints"]
        verbs: ["get"]
      - apiGroups: ["extensions"]
        resources: ["podsecuritypolicies"]
        resourceNames: ["nfs-provisioner"]
        verbs: ["use"]
    ---
    kind: ClusterRoleBinding
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: run-nfs-provisioner
    subjects:
      - kind: ServiceAccount
        name: nfs-provisioner
        namespace: default
    roleRef:
      kind: ClusterRole
      name: nfs-provisioner-runner
      apiGroup: rbac.authorization.k8s.io
    ---
    kind: Role
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: leader-locking-nfs-provisioner
    rules:
      - apiGroups: [""]
        resources: ["endpoints"]
        verbs: ["get", "list", "watch", "create", "update", "patch"]
    ---
    kind: RoleBinding
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: leader-locking-nfs-provisioner
    subjects:
      - kind: ServiceAccount
        name: nfs-provisioner
        namespace: default
    roleRef:
      kind: Role
      name: leader-locking-nfs-provisioner
      apiGroup: rbac.authorization.k8s.io

通过kubectl更新yaml文件

kubectl apply -f service-rbac.yaml

4.通过deployment创建pod用来运行nfs-provisioner

cat  deployment.yaml

kind: Deployment
    apiVersion: apps/v1
    metadata:
      name: nfs-provisioner
    spec:
      selector:
        matchLabels:
          app: nfs-provisioner
      replicas: 1
      strategy:
        type: Recreate
      template:
        metadata:
          labels:
            app: nfs-provisioner
        spec:
          serviceAccount: nfs-provisioner
          containers:
            - name: nfs-provisioner
              image: registry.cn-hangzhou.aliyuncs.com/open-ali/nfs-client-provisioner:latest
              volumeMounts:
                - name: nfs-client-root
                  mountPath: /persistentvolumes
              env:
                - name: PROVISIONER_NAME
                  value: example.com/nfs
                - name: NFS_SERVER
                  value: 192.168.0.6
                - name: NFS_PATH
                  value: /data/storage
          volumes:
            - name: nfs-client-root
              nfs:
                server: 192.168.0.6
                path: /data/storage

通过kubectl更新yaml文件

kubectl apply -f deployment.yaml

查看nfs provisioner的pod是否创建成功

kubectl get pods

显示如下，说明创建成功

NAME                               READY   STATUS    RESTARTS   AGE
    nfs-provisioner-7d6859cc59-pzr7n   1/1     Running   0          72s

创建storageclass

cat  class.yaml

kind: StorageClass
    apiVersion: storage.k8s.io/v1
    metadata:
      name: nfs-storage
    provisioner: example.com/nfs

通过kubectl更新yaml文件

kubectl apply -f class.yaml

查看storageclass是否创建成功

kubectl get storageclass

显示如下，说明创建成功

NAME          PROVISIONER       RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
    nfs-storage   example.com/nfs   Delete          Immediate           false                  11h

通过helm部署gitlab

**1.下载gitlab-ce.tar.gz压缩包，上传到k8s的master1节点**

压缩包在百度网盘，地址如下：

链接：https://pan.baidu.com/s/1VWB9dwu70zpn6IUvcKnz0A 
    提取码：td2x

**2.解压gitlab-ce.tar.gz**

tar zxvf gitlab-ce.tar.gz

**3.进入到解压路径，通过helm安装gitlab、postgresql、redis**

cd gitlab-ce

通过helm安装部署  
helm install .

查看是否部署成功

kubectl get pods

显示如下，看到STATUS都是running状态，说明部署成功

NAME                                             READY   STATUS    RESTARTS   AGE
    alliterating-quail-gitlab-ce-756ddcb6d5-rwnzj    1/1     Running   0          3m56s
    alliterating-quail-postgresql-68bc89cd7f-slt6g   1/1     Running   0          3m56s
    alliterating-quail-redis-7954fbbfbc-5jqfx        1/1     Running   0          3m56s

**注意：**

上面READY下面看到1/1，STATUS是running，才表示已经正常启动了

查看gitlab在宿主机暴露的端口

kubectl get svc | grep gitlab

显示如下

alliterating-quail-gitlab-ce    NodePort    10.105.171.114   <none>        22:32503/TCP,80:31572/TCP,443:32

通过上面可以看到容器里的80端口在宿主机映射的端口是31572，所以浏览器访问k8s的master1节点ip:31572即可，我在浏览器访问如下地址：

192.168.0.6:31572

出现如下：

![format_png 1][]

默认的用户名和密码分别是：

root

gitlab0920

输入用户名和密码之后即可登陆到gitlab的web界面

![format_png 2][]

**gitlab-ce.tar.gz**里涉及的Chart文件说明讲解

**1.上面的压缩包解压之后，在gitlab-ce目录下，有个values.yaml文件，内容及解释如下**

## GitLab CE image
    ## ref: https://hub.docker.com/r/gitlab/gitlab-ce/tags/
    ##
    image: gitlab/gitlab-ce:10.6.2-ce.0
    #gitlab使用的镜像，我们安装的是10版本
    
    
    ## Specify a imagePullPolicy
    ## 'Always' if imageTag is 'latest', else set to 'IfNotPresent'
    ## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
    ##
    # imagePullPolicy:
    imagePullPolicy: IfNotPresent
    #镜像拉取策略，IfNotPresent表示本地不存在，就从官方拉取
    
    
    ## The URL (with protocol) that your users will use to reach the install.
    ## ref: https://docs.gitlab.com/omnibus/settings/configuration.html#configuring-the-external-url-for-gitlab
    ##
    externalUrl: http://gitlab.lucky.com/
    #可访问的域名，这里我随便写了有一个，暂时用不到
    ## Change the initial default admin password if set. If not set, you'll be
    ## able to set it when you first visit your install.
    ##
    gitlabRootPassword: "gitlab0920"
    #登陆gitlab web界面的密码，可以随便写，符合密码复杂度即可
    #登陆gitlab web界面的默认用户是root
    
    
    ## For minikube, set this to NodePort, elsewhere use LoadBalancer
    ## ref: http://kubernetes.io/docs/user-guide/services/#publishing-services---service-types
    ##
    serviceType: NodePort
    #service的类型，NodePort表示暴露出来的服务可以在k8s集群外部访问
    
    
    ## Ingress configuration options
    ##
    ingress:
      annotations:
          # kubernetes.io/ingress.class: nginx
          # kubernetes.io/tls-acme: "true"
      enabled: false
      tls:
          # - secretName: gitlab.cluster.local
          #   hosts:
          #     - gitlab.cluster.local
      url: gitlab.cluster.local
    
    
    #上面是ingress相关的，暂时我们用不到
    
    
    ## Configure external service ports
    ## ref: http://kubernetes.io/docs/user-guide/services/
    sshPort: 22
    #容器里暴露的22端口
    httpPort: 80
    #容器里暴露的80端口
    httpsPort: 443
    #容器里暴露的443端口
    ## livenessPort Port of liveness probe endpoint
    livenessPort: http
    ## readinessPort Port of readiness probe endpoint
    readinessPort: http
    
    
    ## Configure resource requests and limits
    ## ref: http://kubernetes.io/docs/user-guide/compute-resources/
    ##
    resources:
      ## GitLab requires a good deal of resources. We have split out Postgres and
      ## redis, which helps some. Refer to the guidelines for larger installs.
      ## ref: https://docs.gitlab.com/ce/install/requirements.html#hardware-requirements
      requests:
        memory: 1Gi
        cpu: 500m
      limits:
        memory: 2Gi
        cpu: 1
    
    
    ## Enable persistence using Persistent Volume Claims
    ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/
    ## ref: https://docs.gitlab.com/ce/install/requirements.html#storage
    ##
    persistence:
    #下面配置的是跟持久化存储相关的内容
      ## This volume persists generated configuration files, keys, and certs.
      ##
      gitlabEtc:
        enabled: true
        size: 1Gi
        ## If defined, volume.beta.kubernetes.io/storage-class: <storageClass>
        ## Default: volume.alpha.kubernetes.io/storage-class: default
        ##
        storageClass: "nfs-storage"
    #开启了storageclass，这里的storageclass是nfs-storage，
    #就是我们上面创建的那个nfs-storage
        accessMode: ReadWriteOnce
    #访问模式，单路独写
      ## This volume is used to store git data and other project files.
      ## ref: https://docs.gitlab.com/omnibus/settings/configuration.html#storing-git-data-in-an-alternative-directory
      ##
      gitlabData:
        enabled: true
        size: 10Gi
        ## If defined, volume.beta.kubernetes.io/storage-class: <storageClass>
        ## Default: volume.alpha.kubernetes.io/storage-class: default
        ##
        storageClass: "nfs-storage"
    #开启了storageclass，这里的storageclass是nfs-storage，
    #就是我们上面创建的那个nfs-storage
        accessMode: ReadWriteOnce
    #访问模式，单路独写
    ## Configuration values for the postgresql dependency.
    ## ref: https://github.com/kubernetes/charts/blob/master/stable/postgresql/README.md
    ##
    postgresql:
      # 9.6 is the newest supported version for the GitLab container
      imageTag: "9.6.5"
      cpu: 1000m
      memory: 1Gi
    
    
      postgresUser: gitlab
      postgresPassword: gitlab
      postgresDatabase: gitlab
    
    
      persistence:
        size: 10Gi
        storageClass: "nfs-storage"
    ## Configuration values for the redis dependency.
    ## ref: https://github.com/kubernetes/charts/blob/master/stable/redis/README.md
    ##
    redis:
      redisPassword: "gitlab"
    
    
      resources:
        requests:
          memory: 1Gi
    
    
      persistence:
        size: 10Gi
        storageClass: "nfs-storage"
    #开启了storageclass，这里的storageclass是nfs-storage，
    #就是我们上面创建的那个nfs-storage

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官方源代码如下：

https://github.com/helm/charts/blob/master/stable/gitlab-ce/values.yaml

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[k8s1.18_master_-]: https://blog.csdn.net/weixin_38320674/article/details/106089099
[Kubernetes Pod_-livenessProbe_readinessProbe]: https://blog.csdn.net/weixin_38320674/article/details/106394498
[kubernetes pod_-postStart_preStop]: https://blog.csdn.net/weixin_38320674/article/details/106485489
[k8s]: https://blog.csdn.net/weixin_38320674/article/details/105828889
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[-tomcat_java_close_wait]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638c56cc140540a8015c902c5b38ae6fc9245ab09687e63084b0c3c4a10cb1fe8c4627efd4&idx=1&mid=2247484227&scene=21&sn=6900363f032604263553ed5f6b04b81f#wechat_redirect
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[ingress_kubernetes_pod]: https://blog.csdn.net/weixin_38320674/article/details/106632320
[jenkins_Pipeline]: https://blog.csdn.net/weixin_38320674/article/details/106774695
[Alertmanager]: https://blog.csdn.net/weixin_38320674/article/details/106678752
[jenkins_kubernetes_harbor_gitlab_devops]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638d2fcc14043990967471ba8a2aaf389ab483594fd81395b5afda1c23a9eff4371df6bca4&idx=1&mid=2247483962&scene=21&sn=595eac335f7fb523bbb60cbbede109ca#wechat_redirect
[jenkins_kubernetes]: https://blog.csdn.net/weixin_38320674/article/details/106654689
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