【Microk8s】Microk8s部署Nexus3及基本使用

1. 部署Nexus3

1.1. Nexus3示例yaml（附带Storage）

---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: development
  name: dev-nexus3
  labels:
    app: dev-nexus3
spec:
  replicas: 1
  selector:
    matchLabels:
      app: dev-nexus3
  template:
    metadata:
      labels:
        app: dev-nexus3
    spec:
      terminationGracePeriodSeconds: 10
      serviceAccountName: nexus3
      containers:
      - name: nexus3
        image: sonatype/nexus3:3.32.0
        imagePullPolicy: IfNotPresent
        ports:
          - containerPort: 8081
            name: web
            protocol: TCP
        livenessProbe:
          httpGet:
            path: /
            port: 8081
          initialDelaySeconds: 100
          periodSeconds: 30
          failureThreshold: 6
        readinessProbe:
          httpGet:
            path: /
            port: 8081
          initialDelaySeconds: 100
          periodSeconds: 30
          failureThreshold: 6
        resources:
          limits:
            cpu: 4000m
            memory: 2Gi
          requests:
            cpu: 500m
            memory: 512Mi
        volumeMounts:
        - name: nexus-data
          mountPath: /nexus-data
      volumes:
        - name: nexus-data
          # 使用 hostPath 模式(直接访问宿主机路径,但是官方不推荐)
          #hostPath:
          #  path: /k8sdata/development/dev-nexus-data
          #  type: DirectoryOrCreate
          # 使用 storage pvc 模式 (需要结合存储配置使用)
          persistentVolumeClaim:
            claimName: dev-nexus-pvc

---
apiVersion: v1
kind: Service
metadata:
  name: dev-nexus3
  namespace: development
  labels:
    app: dev-nexus3
spec:
  selector:
    app: dev-nexus3
  type: ClusterIP
  ports:
    - name: web
      protocol: TCP
      port: 8081
      targetPort: 8081

---
# 持久卷 绑定storage class 将本地存储或nfs分配到对应的storage class 挂载文件夹
apiVersion: v1
kind: PersistentVolume
metadata:
  name: dev-nexus-pv
spec:
  capacity:
    storage: 100Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: dev-storage
  hostPath:
    path: /k8sdata/development/dev-nexus-data

---
# 存储类 挂载到pv上 用来动态划分 pvc 类似硬盘管理
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: dev-storage
provisioner: k8s-sigs.io/k8s-data-dev  # 可以是其他名字,但是必须是deployment环境变量 PROVISIONER_NAME 的值
parameters:
  archiveOnDelete: "true"  # false表示不存档，即删除数据，true表示存档，即重命名路径
allowVolumeExpansion: true  # 是否允许pvc扩容


---
# 动态卷
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: dev-nexus-pvc
  namespace: development
  labels:
    app: dev-nexus-pvc
spec:
  storageClassName: dev-storage  # 指定存储类
  volumeName: dev-nexus-pv  # 指定pv名
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nexus3
 
 
---

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nexus3
rules:
- apiGroups: [""]
  resources: ["pods","events"]
  verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
  resources: ["pods/exec"]
  verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
  resources: ["pods/log"]
  verbs: ["get","list","watch"]
- apiGroups: [""]
  resources: ["secrets","events"]
  verbs: ["get"]
 
 
---
 
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: nexus3
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: nexus3
subjects:
- kind: ServiceAccount
  name: nexus3

1.2. 应用yaml文件

kc apply -f [yaml文件名称]

1.3. 使用Ingress代理

1.3.1 在Ingress命名空间创建Service映射

1. 示例yaml

kind: Service
apiVersion: v1
metadata:
  name: dev-nexus3
  namespace: ingress
spec:
  type: ExternalName
  # 写法对应的命名空间 development 下的 dev-nexus3 服务
  externalName: dev-nexus3.development.svc.cluster.local
  internalTrafficPolicy: Cluster

2. 应用yaml文件

kc apply -f [yaml文件名称]

1.3.2 Ingress配置代理

1. 进入Dashboard，切换到命名空间Ingress；
2. 选择左侧目录 Service -> Ingresses；
3. 编辑Ingress配置；

# 修改 spec.rules.host 节点的内容
spec:
 ingressClassName: public
 rules:
   - host: devops.nexus.com
     http:
       paths:
         - path: /
           pathType: Prefix
           backend:
             service:
               name: dev-nexus3
               port:
                 number: 8081

4. 更新Ingress配置；
5. 配置访问机host，将host指向对应Ingress所在IP；
6. 访问 http://devops.nexus.com 查看是否正常。

2. Nexus3使用示例

1. 登录Nexus3，首次访问密码在Nexus数据目录下，可以在 1.1 中配置的目录下找到；
2. 点击配置按钮（齿轮）进入配置页面；
3. Blob Stores可以配置存储，一般使用默认即可；
4. Repositories中配置私服仓库：
   a.点击 Create respository
   b.选择要创建的仓库类型（group-仓库组 hosted-私有仓库 proxy-代理仓库）