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在k3s中部署OrdinaryRoad(一)
OrdinaryRoad
创建于:2022-04-27 18:41:18
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手上有两台服务器,想组个集群部署一下k3s玩玩,部署MySQL、Redis和Nacos
# Podman [Podman添加私有镜像源配置 registries.conf_Kiritow的博客-CSDN博客_podman registry](https://blog.csdn.net/Kiritow/article/details/113854996) [Docker私有镜像仓库 - 一杯水M - 博客园 (cnblogs.com)](https://www.cnblogs.com/WarBlog/p/15469441.html) ## 搭建镜像仓库 **Docker官方的Docker Registry是一个基础版本的Docker镜像仓库,具备仓库管理的完整功能,但是没有图形化界面。** **搭建方式比较简单,命令如下:** ``` podman run -d \    --restart=always \    --name registry   \    -p 5000:5000 \    -v registry-data:/var/lib/registry \   registry ``` **命令中挂载了一个数据卷registry-data到容器内的/var/lib/registry 目录,这是私有镜像库存放数据的目录。** **访问**[http://YourIp:5000/v2/_catalog](http://YourIp:5000/v2/_catalog) 可以查看当前私有镜像服务中包含的镜像 ``` curl http://localhost:5000/v2/_catalog ``` ## 修改配置 **其中prefix是pull的时候指定的镜像前缀,location是获取镜像的地址,如果不指定prefix则默认和location一致。insecure=true表示允许通过HTTP协议来获取镜像,对于私有化部署/内网测试环境下无https证书的环境来说很有帮助。** ``` # /etc/containers/registries.conf [[registry]] prefix = "10.0.12.13:5000" location = "10.0.12.13:5000" insecure = true ``` # 修改默认端口范围30000-32767 1. **编辑 kube-apiserver.yaml文件** ``` vi /etc/systemd/system/k3s.service ``` 2. **修改ExecStart,加上 **`--kube-apiserver-arg service-node-port-range=1-65535` ``` ExecStart=/usr/local/bin/k3s server --kube-apiserver-arg service-node-port-range=1-65535 ``` 3. **重启 kubelet** ``` systemctl daemon-reload systemctl restart k3s ``` # 创建Namespace [名字空间 | Kubernetes](https://kubernetes.io/zh/docs/concepts/overview/working-with-objects/namespaces/) **控制台创建** ``` apiVersion: v1 kind: Namespace metadata: name: YOUR_NAMESPACE_NAME ``` ## 查看namespace ``` kubectl get namespaces ``` ## 设置名字空间偏好 **你可以永久保存名字空间,以用于对应上下文中所有后续 kubectl 命令。** ``` kubectl config set-context --current --namespace=or-dev # 验证之 kubectl config view | grep namespace: ``` # 创建有状态应用MySQL **jnC8ZVj!TL%PJe8n** [示例:使用 Persistent Volumes 部署 WordPress 和 MySQL | Kubernetes](https://kubernetes.io/zh/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/) ## 创建 kustomization.yaml ### 创建 Secret 生成器 **A **[Secret](https://kubernetes.io/zh/docs/concepts/configuration/secret/) 是存储诸如密码或密钥之类的敏感数据的对象。从 1.14 开始,`kubectl`支持使用 kustomization 文件管理 Kubernetes 对象。您可以通过 `kustomization.yaml`中的生成器创建一个 Secret。 **通过以下命令在** `kustomization.yaml`中添加一个 Secret 生成器。您需要用您要使用的密码替换 `YOUR_PASSWORD`。 ``` # /root/ordinaryroad/or-mysql/kustomization.yaml cat <<EOF >./kustomization.yaml secretGenerator: - name: mysql-pass namespace: or-dev literals: - password=YOUR_PASSWORD EOF ``` ## 单实例MySQL **以下 manifest 文件描述了单实例 MySQL 部署。MySQL 容器将 PersistentVolume 挂载在** `/var/lib/mysql`。 `MYSQL_ROOT_PASSWORD`环境变量设置来自 Secret 的数据库密码。 ``` # /root/ordinaryroad/or-mysql/mysql-deployment.yaml apiVersion: v1 kind: Service metadata: name: mysql namespace: or-dev spec: type: NodePort # 配置为NodePort,外部可以访问 ports: - port: 3306 targetPort: 3306 # 容器暴露的端口,与Dockerfile暴露端口保持一致 nodePort: 3306 # NodePort,外部访问的端口 selector: tier: mysql --- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: mysql-pv-claim namespace: or-dev spec: accessModes: - ReadWriteOnce resources: requests: storage: 20Gi --- apiVersion: apps/v1 kind: Deployment metadata: name: mysql namespace: or-dev spec: selector: matchLabels: tier: mysql strategy: type: Recreate template: metadata: labels: tier: mysql spec: containers: - image: mysql/mysql-server:8.0.26 name: mysql env: - name: TZ value: Asia/Shanghai - name: MYSQL_ROOT_PASSWORD valueFrom: secretKeyRef: name: mysql-pass key: password ports: - containerPort: 3306 name: mysql volumeMounts: - name: mysql-persistent-storage mountPath: /var/lib/mysql volumes: - name: mysql-persistent-storage persistentVolumeClaim: claimName: mysql-pv-claim ``` ## 补充到 `kustomization.yaml` 文件。 ``` # /root/ordinaryroad/or-mysql/kustomization.yaml cat <<EOF >>./kustomization.yaml resources: - mysql-deployment.yaml EOF ``` ## 应用 `kustomization.yaml`包含用于部署 WordPress 网站的所有资源以及 MySQL 数据库。您可以通过以下方式应用目录 ``` kubectl apply -k ./ ``` ``` secret/or-mysql-pass-2fg88hk64d created service/or-mysql created deployment.apps/or-mysql created persistentvolumeclaim/or-mysql-pv-claim created ``` # 创建有状态应用Redis [使用 ConfigMap 来配置 Redis | Kubernetes](https://kubernetes.io/zh/docs/tutorials/configuration/configure-redis-using-configmap/) ## kustomization.yaml ``` # /root/ordinaryroad/or-redis/kustomization.yaml resources: - redis-config.yaml - redis-deployment.yaml ``` ## redis-config.yaml ``` # /root/ordinaryroad/or-redis/redis-config.yaml apiVersion: v1 kind: ConfigMap metadata: name: redis-config namespace: or-dev data: redis-config: | bind '* -::*' ``` ## redis-deployment.yaml ``` # /root/ordinaryroad/or-redis/redis-deployment.yaml apiVersion: v1 kind: Service metadata: name: redis namespace: or-dev spec: type: NodePort # 配置为NodePort,外部可以访问 ports: - port: 6379 targetPort: 6379 # 容器暴露的端口,与Dockerfile暴露端口保持一致 nodePort: 6379 # NodePort,外部访问的端口 selector: tier: redis --- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: redis-pv-claim namespace: or-dev spec: accessModes: - ReadWriteOnce resources: requests: storage: 10Gi --- apiVersion: apps/v1 kind: Deployment metadata: name: redis namespace: or-dev spec: selector: matchLabels: tier: redis strategy: type: Recreate template: metadata: labels: tier: redis spec: containers: - image: redis:6.2.6 name: redis ports: - containerPort: 6379 name: redis volumeMounts: - name: redis-persistent-storage mountPath: /data - name: redis-config mountPath: /usr/local/etc/redis volumes: - name: redis-persistent-storage persistentVolumeClaim: claimName: redis-pv-claim - name: redis-config configMap: name: redis-config items: - key: redis-config path: redis.conf ``` ## 应用 ``` kubectl apply -k ./ ``` ``` configmap/redis-config created service/redis created deployment.apps/redis created persistentvolumeclaim/redis-pv-claim created ``` # 创建无状态应用Nacos ## kustomization.yaml ``` # /root/ordinaryroad/nacos/kustomization.yaml secretGenerator: - name: nacos-mysql-pass namespace: or-dev literals: - password=jnC8ZVj!TL%PJe8n resources: - nacos-deployment.yaml ``` ## nacos-deployment.yaml ``` # /root/ordinaryroad/nacos/nacos-deployment.yaml apiVersion: v1 kind: Service metadata: name: nacos namespace: or-dev spec: type: NodePort # 配置为NodePort,外部可以访问 ports: - port: 8848 targetPort: 8848 # 容器暴露的端口,与Dockerfile暴露端口保持一致 nodePort: 8848 # NodePort,外部访问的端口 selector: tier: nacos --- apiVersion: apps/v1 kind: Deployment metadata: name: nacos namespace: or-dev spec: selector: matchLabels: tier: nacos replicas: 1 template: metadata: labels: tier: nacos spec: containers: - name: nacos image: nacos/nacos-server:v2.0.4 env: - name: PREFER_HOST_MODE value: "hostname" - name: MODE value: "standalone" - name: SPRING_DATASOURCE_PLATFORM value: "mysql" - name: MYSQL_SERVICE_DB_PARAM value: "useUnicode=true&characterEncoding=utf-8&useSSL=false&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true" - name: MYSQL_SERVICE_HOST value: "mysql.or-dev" - name: MYSQL_SERVICE_DB_NAME value: "or_config_pro" - name: MYSQL_SERVICE_PORT value: "3306" - name: MYSQL_SERVICE_USER value: "root" - name: MYSQL_SERVICE_PASSWORD valueFrom: secretKeyRef: name: nacos-mysql-pass key: password ports: - containerPort: 8848 name: nacos ``` # ~使用Ingress暴露服务~ [Ingress | Kubernetes](https://kubernetes.io/zh/docs/concepts/services-networking/ingress/#the-ingress-resource) [k8s-(七)暴露服务的三种方式*新林。的博客-CSDN博客*k8s 服务暴露](https://blog.csdn.net/qq_21187515/article/details/112363072) [k8s-(八)通过Ingress-nginx暴露service给外部网络访问*新林。的博客-CSDN博客*spanking外网](https://blog.csdn.net/qq_21187515/article/details/112497544) **步骤一,创建Ingress的yaml描述文件** **首先创建ingress-nginx的文件目录(后面创建的ingress相关的文件都在这里面,便于维护)** **mkdir ingress-nginx** **创建一个名称为deploy.yaml,内容如下** **注:** **1.这个yaml描述文件有点长,简单描述一下,里面主要创建了一个ingress-nginx的命名空间,nginx-ingress-controller的Deployment对象以及最后面创建ingress-nginx的Service,Service配置映射的端口** **2.我安装的k8s版本是1.18.0** ``` kind: ConfigMap apiVersion: v1 metadata: name: nginx-configuration namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- kind: ConfigMap apiVersion: v1 metadata: name: tcp-services namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- kind: ConfigMap apiVersion: v1 metadata: name: udp-services namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- apiVersion: apps/v1 kind: Deployment metadata: name: default-http-backend namespace: or-dev labels: app: default-http-backend spec: replicas: 1 selector: matchLabels: app: default-http-backend template: metadata: labels: app: default-http-backend spec: terminationGracePeriodSeconds: 60 containers: - name: default-http-backend image: registry.cn-qingdao.aliyuncs.com/kubernetes_xingej/defaultbackend-amd64:1.5 #建议提前在node节点下载镜像; livenessProbe: httpGet: path: /healthz port: 8080 scheme: HTTP initialDelaySeconds: 30 timeoutSeconds: 5 ports: - containerPort: 8080 resources: # 这里调整了cpu和memory的大小,可能不同集群限制的最小值不同,看部署失败的原因就清楚 limits: cpu: 100m memory: 100Mi requests: cpu: 100m memory: 100Mi --- apiVersion: v1 kind: Service metadata: name: default-http-backend namespace: or-dev labels: app: default-http-backend spec: ports: - port: 80 targetPort: 8080 selector: app: default-http-backend --- apiVersion: v1 kind: ServiceAccount metadata: name: nginx-ingress-serviceaccount namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRole metadata: name: nginx-ingress-clusterrole labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx rules: - apiGroups: - "" resources: - configmaps - endpoints - nodes - pods - secrets verbs: - list - watch - apiGroups: - "" resources: - nodes verbs: - get - apiGroups: - "" resources: - services verbs: - get - list - watch - apiGroups: - "" resources: - events verbs: - create - patch - apiGroups: - "extensions" - "networking.k8s.io" resources: - ingresses verbs: - get - list - watch - apiGroups: - "extensions" - "networking.k8s.io" resources: - ingresses/status verbs: - update --- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: Role metadata: name: nginx-ingress-role namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx rules: - apiGroups: - "" resources: - configmaps - pods - secrets - namespaces verbs: - get - apiGroups: - "" resources: - configmaps resourceNames: # Defaults to "<election-id>-<ingress-class>" # Here: "<ingress-controller-leader>-<nginx>" # This has to be adapted if you change either parameter # when launching the nginx-ingress-controller. - "ingress-controller-leader-nginx" verbs: - get - update - apiGroups: - "" resources: - configmaps verbs: - create - apiGroups: - "" resources: - endpoints verbs: - get --- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: RoleBinding metadata: name: nginx-ingress-role-nisa-binding namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: nginx-ingress-role subjects: - kind: ServiceAccount name: nginx-ingress-serviceaccount namespace: or-dev --- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRoleBinding metadata: name: nginx-ingress-clusterrole-nisa-binding labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: nginx-ingress-clusterrole subjects: - kind: ServiceAccount name: nginx-ingress-serviceaccount namespace: or-dev --- apiVersion: apps/v1 kind: Deployment metadata: name: nginx-ingress-controller namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx spec: replicas: 2 selector: matchLabels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx template: metadata: labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx annotations: prometheus.io/port: "10254" prometheus.io/scrape: "true" spec: # wait up to five minutes for the drain of connections terminationGracePeriodSeconds: 300 serviceAccountName: nginx-ingress-serviceaccount nodeSelector: kubernetes.io/os: linux containers: - name: nginx-ingress-controller image: suisrc/ingress-nginx:0.30.0 #建议提前在node节点下载镜像; args: - /nginx-ingress-controller - --default-backend-service=$(POD_NAMESPACE)/default-http-backend - --configmap=$(POD_NAMESPACE)/nginx-configuration - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services - --udp-services-configmap=$(POD_NAMESPACE)/udp-services - --publish-service=$(POD_NAMESPACE)/ingress-nginx - --annotations-prefix=nginx.ingress.kubernetes.io securityContext: allowPrivilegeEscalation: true capabilities: drop: - ALL add: - NET_BIND_SERVICE # www-data -> 101 runAsUser: 101 env: - name: POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace ports: - name: http containerPort: 80 protocol: TCP - name: https containerPort: 443 protocol: TCP livenessProbe: failureThreshold: 3 httpGet: path: /healthz port: 10254 scheme: HTTP initialDelaySeconds: 10 periodSeconds: 10 successThreshold: 1 timeoutSeconds: 10 readinessProbe: failureThreshold: 3 httpGet: path: /healthz port: 10254 scheme: HTTP periodSeconds: 10 successThreshold: 1 timeoutSeconds: 10 lifecycle: preStop: exec: command: - /wait-shutdown --- apiVersion: v1 kind: LimitRange metadata: name: ingress-nginx namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx spec: limits: - min: memory: 90Mi cpu: 100m type: Container --- apiVersion: v1 kind: Service metadata: name: ingress-nginx namespace: or-dev labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx spec: type: NodePort ports: - name: http port: 80 targetPort: 80 protocol: TCP # HTTP nodePort: 80 - name: https port: 443 targetPort: 443 protocol: TCP # HTTPS nodePort: 443 selector: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx ```
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