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kubernetes集群中需要在指定的几个节点上只部署Nginx Ingress Controller实例,不会跑其他业务容器。
环境说明
教程基于有k8s集群,并安装好helm部署环境。强烈推荐使用helm发布您的代码!
执行helm version出现如下证明环境已经就绪。
- [root@oneinstack ~]# helm version
- Client: &version.Version{SemVer:”v2.13.1″, GitCommit:”618447cbf203d147601b4b9bd7f8c37a5d39fbb4″, GitTreeState:”clean”}
- Server: &version.Version{SemVer:”v2.13.1″, GitCommit:”618447cbf203d147601b4b9bd7f8c37a5d39fbb4″, GitTreeState:”clean”}
helm下载ingress chart
搜索ingress charts
- helm search ingress
下载nginx ingress
- helm fetch stable/nginx-ingress
fetch之后得到nginx-ingress-1.4.0.tgz
修改ingress helm chart
解压nginx-ingress-1.4.0.tgz
- tar xzf nginx-ingress-1.4.0.tgz
注意: 解压过程出现implausibly old time stamp 1970-01-01 08:00:00可忽略
修改values.yaml,下面是我的修改好的:
- ## nginx configuration
- ## Ref: https://github.com/kubernetes/ingress/blob/master/controllers/nginx/configuration.md
- ##
- controller:
- name: controller
- image:
- repository: quay.io/kubernetes-ingress-controller/nginx-ingress-controller # 建议将镜像拖到自己私有参考,修改私有仓库地址
- tag: “0.24.1”
- pullPolicy: IfNotPresent
- # www-data -> uid 33
- runAsUser: 33
- config: {}
- # Will add custom header to Nginx https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/customization/custom-headers
- headers: {}
- # Required for use with CNI based kubernetes installations (such as ones set up by kubeadm),
- # since CNI and hostport don’t mix yet. Can be deprecated once https://github.com/kubernetes/kubernetes/issues/23920
- # is merged
- hostNetwork: true # 80 443 暴露到宿主机
- # Optionally change this to ClusterFirstWithHostNet in case you have ‘hostNetwork: true’.
- # By default, while using host network, name resolution uses the host’s DNS. If you wish nginx-controller
- # to keep resolving names inside the k8s network, use ClusterFirstWithHostNet.
- dnsPolicy: ClusterFirst
- ## Use host ports 80 and 443
- daemonset:
- useHostPort: false
- hostPorts:
- http: 80
- https: 443
- ## healthz endpoint
- stats: 18080
- ## Required only if defaultBackend.enabled = false
- ## Must be <namespace>/<service_name>
- ##
- defaultBackendService: “”
- ## Election ID to use for status update
- ##
- electionID: ingress-controller-leader
- ## Name of the ingress class to route through this controller
- ##
- ingressClass: nginx # 后续ingress.yaml annotations指定kubernetes.io/ingress.class: nginx
- # labels to add to the pod container metadata
- podLabels: {}
- # key: value
- ## Allows customization of the external service
- ## the ingress will be bound to via DNS
- publishService:
- enabled: false
- ## Allows overriding of the publish service to bind to
- ## Must be <namespace>/<service_name>
- ##
- pathOverride: “”
- ## Limit the scope of the controller
- ##
- scope:
- enabled: false
- namespace: “” # defaults to .Release.Namespace
- ## Additional command line arguments to pass to nginx-ingress-controller
- ## E.g. to specify the default SSL certificate you can use
- ## extraArgs:
- ## default-ssl-certificate: “<namespace>/<secret_name>”
- extraArgs: {}
- ## Additional environment variables to set
- extraEnvs: []
- # extraEnvs:
- # – name: FOO
- # valueFrom:
- # secretKeyRef:
- # key: FOO
- # name: secret-resource
- ## DaemonSet or Deployment
- ##
- kind: DaemonSet #DaemonSet模式
- # The update strategy to apply to the Deployment or DaemonSet
- ##
- updateStrategy: {}
- # rollingUpdate:
- # maxUnavailable: 1
- # type: RollingUpdate
- # minReadySeconds to avoid killing pods before we are ready
- ##
- minReadySeconds: 0
- ## Node tolerations for server scheduling to nodes with taints
- ## Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/
- ##
- tolerations: #在节点上打污点,此处是容忍的key value effect
- – key: “nginx-ingress”
- operator: “Equal”
- value: “true”
- effect: “NoSchedule”
- affinity: {}
- ## Node labels for controller pod assignment
- ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
- ##
- nodeSelector:
- nginx-ingress: “true” #使用节点标签选择器,访问在所有节点运行ingress
- ## Liveness and readiness probe values
- ## Ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes
- ##
- livenessProbe:
- failureThreshold: 3
- initialDelaySeconds: 10
- periodSeconds: 10
- successThreshold: 1
- timeoutSeconds: 1
- port: 10254
- readinessProbe:
- failureThreshold: 3
- initialDelaySeconds: 10
- periodSeconds: 10
- successThreshold: 1
- timeoutSeconds: 1
- port: 10254
- ## Annotations to be added to controller pods
- ##
- podAnnotations: # 支持prometheus抓取数据
- prometheus.io/scrape: “true”
- prometheus.io/port: “10254”
- replicaCount: 1
- minAvailable: 1
- resources: {}
- # limits:
- # cpu: 100m
- # memory: 64Mi
- # requests:
- # cpu: 100m
- # memory: 64Mi
- autoscaling:
- enabled: false
- minReplicas: 1
- maxReplicas: 11
- targetCPUUtilizationPercentage: 50
- targetMemoryUtilizationPercentage: 50
- ## Override NGINX template
- customTemplate:
- configMapName: “”
- configMapKey: “”
- service:
- annotations: {}
- labels: {}
- clusterIP: “”
- ## List of IP addresses at which the controller services are available
- ## Ref: https://kubernetes.io/docs/user-guide/services/#external-ips
- ##
- externalIPs: []
- loadBalancerIP: “”
- loadBalancerSourceRanges: []
- enableHttp: true
- enableHttps: true
- ## Set external traffic policy to: “Local” to preserve source IP on
- ## providers supporting it
- ## Ref: https://kubernetes.io/docs/tutorials/services/source-ip/#source-ip-for-services-with-typeloadbalancer
- externalTrafficPolicy: “”
- healthCheckNodePort: 0
- targetPorts:
- http: http
- https: https
- type: ClusterIP
- # type: NodePort
- # nodePorts:
- # http: 32080
- # https: 32443
- nodePorts:
- http: “”
- https: “”
- extraContainers: []
- ## Additional containers to be added to the controller pod.
- ## See https://github.com/lemonldap-ng-controller/lemonldap-ng-controller as example.
- # – name: my-sidecar
- # image: nginx:latest
- # – name: lemonldap-ng-controller
- # image: lemonldapng/lemonldap-ng-controller:0.2.0
- # args:
- # – /lemonldap-ng-controller
- # – –alsologtostderr
- # – –configmap=$(POD_NAMESPACE)/lemonldap-ng-configuration
- # env:
- # – name: POD_NAME
- # valueFrom:
- # fieldRef:
- # fieldPath: metadata.name
- # – name: POD_NAMESPACE
- # valueFrom:
- # fieldRef:
- # fieldPath: metadata.namespace
- # volumeMounts:
- # – name: copy-portal-skins
- # mountPath: /srv/var/lib/lemonldap-ng/portal/skins
- extraVolumeMounts: []
- ## Additional volumeMounts to the controller main container.
- # – name: copy-portal-skins
- # mountPath: /var/lib/lemonldap-ng/portal/skins
- extraVolumes: []
- ## Additional volumes to the controller pod.
- # – name: copy-portal-skins
- # emptyDir: {}
- extraInitContainers: []
- ## Containers, which are run before the app containers are started.
- # – name: init-myservice
- # image: busybox
- # command: [‘sh’, ‘-c’, ‘until nslookup myservice; do echo waiting for myservice; sleep 2; done;’]
- stats:
- enabled: true
- service:
- annotations: {}
- clusterIP: “”
- ## List of IP addresses at which the stats service is available
- ## Ref: https://kubernetes.io/docs/user-guide/services/#external-ips
- ##
- externalIPs: []
- loadBalancerIP: “”
- loadBalancerSourceRanges: []
- servicePort: 18080
- type: ClusterIP
- ## If controller.stats.enabled = true and controller.metrics.enabled = true, Prometheus metrics will be exported
- ##
- metrics:
- enabled: true
- service:
- annotations:
- prometheus.io/scrape: “true”
- prometheus.io/port: “10254”
- clusterIP: “”
- ## List of IP addresses at which the stats-exporter service is available
- ## Ref: https://kubernetes.io/docs/user-guide/services/#external-ips
- ##
- externalIPs: []
- loadBalancerIP: “”
- loadBalancerSourceRanges: []
- servicePort: 9913
- type: ClusterIP
- serviceMonitor:
- enabled: false
- additionalLabels: {}
- namespace: “”
- lifecycle: {}
- priorityClassName: “”
- ## Rollback limit
- ##
- revisionHistoryLimit: 10
- ## Default 404 backend
- ##
- defaultBackend:
- ## If false, controller.defaultBackendService must be provided
- ##
- enabled: true
- name: default-backend
- image:
- repository: registry.cn-hangzhou.aliyuncs.com/google_containers/defaultbackend
- tag: “1.4”
- pullPolicy: IfNotPresent
- extraArgs: {}
- port: 8080
- ## Node tolerations for server scheduling to nodes with taints
- ## Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/
- ##
- tolerations: []
- # – key: “key”
- # operator: “Equal|Exists”
- # value: “value”
- # effect: “NoSchedule|PreferNoSchedule|NoExecute(1.6 only)”
- affinity: {}
- # labels to add to the pod container metadata
- podLabels: {}
- # key: value
- ## Node labels for default backend pod assignment
- ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
- ##
- nodeSelector: {}
- ## Annotations to be added to default backend pods
- ##
- podAnnotations: {}
- replicaCount: 1
- minAvailable: 1
- resources: {}
- # limits:
- # cpu: 10m
- # memory: 20Mi
- # requests:
- # cpu: 10m
- # memory: 20Mi
- service:
- annotations: {}
- clusterIP: “”
- ## List of IP addresses at which the default backend service is available
- ## Ref: https://kubernetes.io/docs/user-guide/services/#external-ips
- ##
- externalIPs: []
- loadBalancerIP: “”
- loadBalancerSourceRanges: []
- servicePort: 80
- type: ClusterIP
- priorityClassName: “”
- ## Enable RBAC as per https://github.com/kubernetes/ingress/tree/master/examples/rbac/nginx and https://github.com/kubernetes/ingress/issues/266
- rbac:
- create: true
- # If true, create & use Pod Security Policy resources
- # https://kubernetes.io/docs/concepts/policy/pod-security-policy/
- podSecurityPolicy:
- enabled: false
- serviceAccount:
- create: true
- name:
- ## Optional array of imagePullSecrets containing private registry credentials
- ## Ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
- imagePullSecrets: []
- # – name: secretName
- # TCP service key:value pairs
- # Ref: https://github.com/kubernetes/contrib/tree/master/ingress/controllers/nginx/examples/tcp
- ##
- tcp: {}
- # 8080: “default/example-tcp-svc:9000”
- # UDP service key:value pairs
- # Ref: https://github.com/kubernetes/contrib/tree/master/ingress/controllers/nginx/examples/udp
- ##
- udp: {}
- # 53: “kube-system/kube-dns:53”
NODE打标签,设置污点
打标签
- kubectl label nodes 10.0.10.7 nginx-ingress=true
- kubectl label nodes 10.0.10.8 nginx-ingress=true
- kubectl label nodes 10.0.10.9 nginx-ingress=true
设置污点
- kubectl taint nodes 10.0.10.7 nginx-ingress=true:NoSchedule
- kubectl taint nodes 10.0.10.8 nginx-ingress=true:NoSchedule
- kubectl taint nodes 10.0.10.9 nginx-ingress=true:NoSchedule
安装nginx-ingress
- helm upgrade nginx-ingress ./nginx-ingress –install –namespace nginx-ingress –dry-run # 测试运行
- helm upgrade nginx-ingress ./nginx-ingress –install –namespace nginx-ingress
注意:
- 需要先在NODE节点打污点、标签
- helm名字和命名空间请使用nginx-ingress, 和直接用yaml文件(ingress-nginx)有区别。否则DaemonSet、pod名字比较奇怪
Sun Apr 14 15:29:38 CST 2019