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海口-老男人 17:42:43就是我要运行一个nodejs服务，先发布为deployment，然后创建service，让集群外可以访问旧报纸 17:43:35也就是 你的需求为 一个app 用delployment 发布 然后service 然后 代理 对吧
部署traefik 发布deployment pod创建servicetraefik 代理service外部访问
docker 19.03.5
kubernetes 1.17.2
为什么选择 traefik，抛弃nginx:
https://www.php.cn/nginx/422461.html特别说明：traefik 2.1 版本更新了灰色发布和流量复制功能 为容器/微服务而生 traefik 官网写的都很不错了 附带一篇 快速入门博文：https://www.qikqiak.com/post/traefik-2.1-101/建议部署traefik 不要用上述链接的方案
注意：这里 Traefik 是部署在 assembly Namespace 下，如果不是需要修改下面部署文件中的 Namespace 属性。
traefik-crd.yaml
在 traefik v2.1 版本后，开始使用 CRD（Custom Resource Definition）来完成路由配置等，所以需要提前创建 CRD 资源。
# cat traefik-crd.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-16#FileName: traefik-crd.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved############################################################################# IngressRouteapiVersion: apiextensions.k8s.io/v1beta1kind: CustomResourceDefinitionmetadata: name: ingressroutes.traefik.containo.usspec: scope: Namespaced group: traefik.containo.us version: v1alpha1 names: kind: IngressRoute plural: ingressroutes singular: ingressroute---## IngressRouteTCPapiVersion: apiextensions.k8s.io/v1beta1kind: CustomResourceDefinitionmetadata: name: ingressroutetcps.traefik.containo.usspec: scope: Namespaced group: traefik.containo.us version: v1alpha1 names: kind: IngressRouteTCP plural: ingressroutetcps singular: ingressroutetcp---## MiddlewareapiVersion: apiextensions.k8s.io/v1beta1kind: CustomResourceDefinitionmetadata: name: middlewares.traefik.containo.usspec: scope: Namespaced group: traefik.containo.us version: v1alpha1 names: kind: Middleware plural: middlewares singular: middleware---## TLSOptionapiVersion: apiextensions.k8s.io/v1beta1kind: CustomResourceDefinitionmetadata: name: tlsoptions.traefik.containo.usspec: scope: Namespaced group: traefik.containo.us version: v1alpha1 names: kind: TLSOption plural: tlsoptions singular: tlsoption---## TraefikServiceapiVersion: apiextensions.k8s.io/v1beta1kind: CustomResourceDefinitionmetadata: name: traefikservices.traefik.containo.usspec: scope: Namespaced group: traefik.containo.us version: v1alpha1 names: kind: TraefikService plural: traefikservices singular: traefikservice
创建RBAC权限
Traefik 需要一定的权限，所以这里提前创建好 Traefik ServiceAccount 并分配一定的权限。
# cat traefik-rbac.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-16#FileName: traefik-rbac.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved############################################################################# ServiceAccountapiVersion: v1kind: ServiceAccountmetadata: namespace: kube-system name: traefik-ingress-controller---## ClusterRolekind: ClusterRoleapiVersion: rbac.authorization.k8s.io/v1beta1metadata: name: traefik-ingress-controllerrules: - apiGroups: [""] resources: ["services","endpoints","secrets"] verbs: ["get","list","watch"] - apiGroups: ["extensions"] resources: ["ingresses"] verbs: ["get","list","watch"] - apiGroups: ["extensions"] resources: ["ingresses/status"] verbs: ["update"] - apiGroups: ["traefik.containo.us"] resources: ["middlewares"] verbs: ["get","list","watch"] - apiGroups: ["traefik.containo.us"] resources: ["ingressroutes"] verbs: ["get","list","watch"] - apiGroups: ["traefik.containo.us"] resources: ["ingressroutetcps"] verbs: ["get","list","watch"] - apiGroups: ["traefik.containo.us"] resources: ["tlsoptions"] verbs: ["get","list","watch"] - apiGroups: ["traefik.containo.us"] resources: ["traefikservices"] verbs: ["get","list","watch"]---## ClusterRoleBindingkind: ClusterRoleBindingapiVersion: rbac.authorization.k8s.io/v1beta1metadata: name: traefik-ingress-controllerroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: traefik-ingress-controllersubjects: - kind: ServiceAccount name: traefik-ingress-controller namespace: kube-system
创建traefik配置文件
由于 Traefik 配置很多，通过 CLI 定义不是很方便，一般时候选择将其配置选项放到配置文件中，然后存入 ConfigMap，将其挂入 traefik 中。
traefik-config.yaml
# cat traefik-config.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-16#FileName: traefik-config.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################kind: ConfigMapapiVersion: v1metadata: name: traefik-config namespace: kube-systemdata: traefik.yaml: |- ping: "" ## 启用 Ping serversTransport: insecureSkipVerify: true ## Traefik 忽略验证代理服务的 TLS 证书 api: insecure: true ## 允许 HTTP 方式访问 API dashboard: true ## 启用 Dashboard debug: false ## 启用 Debug 调试模式 metrics: prometheus: "" ## 配置 Prometheus 监控指标数据，并使用默认配置 entryPoints: web: address: ":80" ## 配置 80 端口，并设置入口名称为 web websecure: address: ":443" ## 配置 443 端口，并设置入口名称为 websecure redis: address: ":663" providers: kubernetesCRD: "" ## 启用 Kubernetes CRD 方式来配置路由规则 kubernetesIngress: "" ## 启动 Kubernetes Ingress 方式来配置路由规则 log: filePath: "" ## 设置调试日志文件存储路径，如果为空则输出到控制台 level: error ## 设置调试日志级别 format: json ## 设置调试日志格式 accessLog: filePath: "" ## 设置访问日志文件存储路径，如果为空则输出到控制台 format: json ## 设置访问调试日志格式 bufferingSize: 0 ## 设置访问日志缓存行数 filters: #statusCodes: ["200"] ## 设置只保留指定状态码范围内的访问日志 retryAttempts: true ## 设置代理访问重试失败时，保留访问日志 minDuration: 20 ## 设置保留请求时间超过指定持续时间的访问日志 fields: ## 设置访问日志中的字段是否保留（keep 保留、drop 不保留） defaultMode: keep ## 设置默认保留访问日志字段 names: ## 针对访问日志特别字段特别配置保留模式 ClientUsername: drop headers: ## 设置 Header 中字段是否保留 defaultMode: keep ## 设置默认保留 Header 中字段 names: ## 针对 Header 中特别字段特别配置保留模式 User-Agent: redact Authorization: drop Content-Type: keep
关键配置部分
entryPoints: web: address: ":80" ## 配置 80 端口，并设置入口名称为 web websecure: address: ":443" ## 配置 443 端口，并设置入口名称为 websecure redis: address: ":6379" ## 配置 6379 端口，并设置入口名称为 redis
部署traefik
采用daemonset这种方式部署Traefik，所以需要提前给节点设置 Label，这样当程序部署时 Pod 会自动调度到设置 Label 的节点上
traefik-deploy.yaml
kubectl label nodes 20.0.0.202 IngressProxy=true#cat traefik-deploy.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-16#FileName: traefik-deploy.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: v1kind: Servicemetadata: name: traefik namespace: kube-systemspec: type: NodePort ports: - name: web port: 80 - name: websecure port: 443 - name: admin port: 8080 - name: redis port: 6379 selector: app: traefik---apiVersion: apps/v1kind: DaemonSetmetadata: name: traefik-ingress-controller namespace: kube-system labels: app: traefikspec: selector: matchLabels: app: traefik template: metadata: name: traefik labels: app: traefik spec: serviceAccountName: traefik-ingress-controller terminationGracePeriodSeconds: 1 containers: - image: traefik:v2.1.2 name: traefik-ingress-lb ports: - name: web containerPort: 80 hostPort: 80 ## 将容器端口绑定所在服务器的 80 端口 - name: websecure containerPort: 443 hostPort: 443 ## 将容器端口绑定所在服务器的 443 端口 - name: redis containerPort: 6379 hostPort: 6379 - name: admin containerPort: 8080 ## Traefik Dashboard 端口 resources: limits: cpu: 2000m memory: 1024Mi requests: cpu: 1000m memory: 1024Mi securityContext: capabilities: drop: - ALL add: - NET_BIND_SERVICE args: - --configfile=/config/traefik.yaml volumeMounts: - mountPath: "/config" name: "config" volumes: - name: config configMap: name: traefik-config tolerations: ## 设置容忍所有污点，防止节点被设置污点 - operator: "Exists" nodeSelector: ## 设置node筛选器，在特定label的节点上启动 IngressProxy: "true"
Traefik2.1 应用已经部署完成，但是想让外部访问 Kubernetes 内部服务，还需要配置路由规则，这里开启了 Traefik Dashboard 配置，所以首先配置 Traefik Dashboard 看板的路由规则，使外部能够访问 Traefik Dashboard。
部署traefik dashboard
# cat traefik-dashboard-route.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-16#FileName: traefik-dashboard-route.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: traefik.containo.us/v1alpha1kind: IngressRoutemetadata: name: traefik-dashboard-route namespace: kube-systemspec: entryPoints: - web routes: - match: Host(`traefik.linux.com`) kind: Rule services: - name: traefik port: 8080
本地host解析
其实到这里 已经能基本看出traefik是如何进行代理的了apiVersion: v1kind: Servicemetadata: name: traefik namespace: kube-systemspec: type: NodePort ports: - name: web port: 80 - name: websecure port: 443 - name: admin port: 8080 selector: app: traefikapiVersion: traefik.containo.us/v1alpha1kind: IngressRoutemetadata: name: traefik-dashboard-route namespace: kube-systemspec: entryPoints: - web //入口 routes: - match: Host(`traefik.linux.com`) //外部访问域名 kind: Rule services: - name: traefik //service.selector port: 8080 //service.ports
问题要求是: 部署一个app 用delployment 发布 然后service 然后 代理
端口是3009
那这里就用个应用实验吧 这里我随便用个prometheus 应用吧
[root@bs-k8s-master01 prometheus]# cat prometheus-cm.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-20#FileName: prometheus-cm.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: v1kind: ConfigMapmetadata: name: prometheus-config namespace: assemblydata: prometheus.yml: | global: scrape_interval: 15s scrape_timeout: 15s alerting: alertmanagers: - static_configs: - targets: ["alertmanager-svc:9093"] rule_files: - /etc/prometheus/rules.yaml scrape_configs: - job_name: 'prometheus' static_configs: - targets: ['localhost:9090'] - job_name: 'traefik' static_configs: - targets: ['traefik.kube-system.svc.cluster.local:8080'] - job_name: "kubernetes-nodes" kubernetes_sd_configs: - role: node relabel_configs: - source_labels: [__address__] regex: '(.*):10250' replacement: '${1}:9100' target_label: __address__ action: replace - action: labelmap regex: __meta_kubernetes_node_label_(.+) - job_name: 'kubernetes-kubelet' kubernetes_sd_configs: - role: node scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt insecure_skip_verify: true bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - action: labelmap regex: __meta_kubernetes_node_label_(.+) - job_name: "kubernetes-apiserver" kubernetes_sd_configs: - role: endpoints scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name] action: keep regex: default;kubernetes;https - job_name: "kubernetes-scheduler" kubernetes_sd_configs: - role: endpoints - job_name: 'kubernetes-cadvisor' kubernetes_sd_configs: - role: node scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - action: labelmap regex: __meta_kubernetes_node_label_(.+) - target_label: __address__ replacement: kubernetes.default.svc:443 - source_labels: [__meta_kubernetes_node_name] regex: (.+) target_label: __metrics_path__ replacement: /api/v1/nodes/${1}/proxy/metrics/cadvisor - job_name: 'kubernetes-service-endpoints' kubernetes_sd_configs: - role: endpoints relabel_configs: - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape] action: keep regex: true - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme] action: replace target_label: __scheme__ regex: (https?) - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path] action: replace target_label: __metrics_path__ regex: (.+) - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port] action: replace target_label: __address__ regex: ([^:]+)(?::\d+)?;(\d+) replacement: $1:$2 - action: labelmap regex: __meta_kubernetes_service_label_(.+) - source_labels: [__meta_kubernetes_namespace] action: replace target_label: kubernetes_namespace - source_labels: [__meta_kubernetes_service_name] action: replace target_label: kubernetes_name rules.yaml: | groups: - name: test-rule rules: - alert: NodeMemoryUsage expr: (sum(node_memory_MemTotal_bytes) - sum(node_memory_MemFree_bytes + node_memory_Buffers_bytes+node_memory_Cached_bytes)) / sum(node_memory_MemTotal_bytes) * 100 > 5 for: 2m labels: team: node annotations: summary: "{{$labels.instance}}: High Memory usage detected" description: "{{$labels.instance}}: Memory usage is above 80% (current value is: {{ $value }}" [root@bs-k8s-master01 prometheus]# cat prometheus-rbac.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-20#FileName: prometheus-rbac.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: v1kind: ServiceAccountmetadata: name: prometheus namespace: assembly---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRolemetadata: name: prometheusrules:- apiGroups: - "" resources: - nodes - services - endpoints - pods - nodes/proxy verbs: - get - list - watch- apiGroups: - "" resources: - configmaps - nodes/metrics verbs: - get- nonResourceURLs: - /metrics verbs: - get---apiVersion: rbac.authorization.k8s.io/v1beta1kind: ClusterRoleBindingmetadata: name: prometheusroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: prometheussubjects:- kind: ServiceAccount name: prometheus namespace: assembly# cat prometheus-deploy.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-20#FileName: prometheus-deploy.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: apps/v1kind: Deploymentmetadata: name: prometheus namespace: assembly labels: app: prometheusspec: selector: matchLabels: app: prometheus template: metadata: labels: app: prometheus spec: imagePullSecrets: - name: k8s-harbor-login serviceAccountName: prometheus containers: - image: harbor.linux.com/prometheus/prometheus:v2.4.3 name: prometheus command: - "/bin/prometheus" args: - "--config.file=/etc/prometheus/prometheus.yml" - "--storage.tsdb.path=/prometheus" - "--storage.tsdb.retention=24h" - "--web.enable-admin-api" # 控制对admin HTTP API的访问，其中包括删除时间序列等功能 - "--web.enable-lifecycle" # 支持热更新，直接执行localhost:9090/-/reload立即生效 ports: - containerPort: 9090 protocol: TCP name: http volumeMounts: - mountPath: "/prometheus" subPath: prometheus name: data - mountPath: "/etc/prometheus" name: config-volume resources: requests: cpu: 100m memory: 512Mi limits: cpu: 100m memory: 512Mi securityContext: runAsUser: 0 volumes: - name: data persistentVolumeClaim: claimName: prometheus-pvc - configMap: name: prometheus-config name: config-volume nodeSelector: ## 设置node筛选器，在特定label的节点上启动 prometheus: "true" [root@bs-k8s-master01 prometheus]# cat prometheus-svc.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-20#FileName: prometheus-svc.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: v1kind: Servicemetadata: name: prometheus namespace: assembly labels: app: prometheusspec: selector: app: prometheus type: NodePort ports: - name: web port: 9090 targetPort: http[root@bs-k8s-master01 prometheus]# cat prometheus-ingressroute.yaml ###########################################################################Author: zisefeizhu#QQ: 2********0#Date: 2020-03-20#FileName: prometheus-ingressroute.yaml#URL: https://www.cnblogs.com/zisefeizhu/#Description: The test script#Copyright (C): 2020 All rights reserved###########################################################################apiVersion: traefik.containo.us/v1alpha1kind: IngressRoutemetadata: name: prometheus namespace: assemblyspec: entryPoints: - web routes: - match: Host(`prometheus.linux.com`) kind: Rule services: - name: prometheus port: 9090 显然已经代理成功了 本地hosts解析
还是没得问题的