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kubernetes ingress部署

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ingress概念

ingress与service,deployment同样都是k8s中的一种资源
ingress用于实现域名方式访问k8s内部应用

技术图片

安装ingress

1. 安装helm:
wget https://get.helm.sh/helm-v3.6.3-linux-amd64.tar.gz

2. 添加到系统命令:
tar xf helm-v3.6.3-linux-amd64.tar.gz
\cp linux-amd64/helm /usr/local/bin

3. 测试helm:
[root@k8s-master01 ~]# helm version
version.BuildInfo{Version:"v3.6.3", GitCommit:"d506314abfb5d21419df8c7e7e68012379db2354", GitTreeState:"clean", GoVersion:"go1.16.5"}

4. 安装ingress:
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update
helm install ingress-nginx ingress-nginx/ingress-nginx
helm pull ingress-nginx/ingress-nginx

5. 指定安装ingress的安装节点lable:
kubectl label node k8s-node02 ingress=true
kubectl label node k8s-node01 ingress=true
kubectl get node --show-labels|grep ingress


5. 修改配置: vim values.yaml

#_________________________________________________________________________________________#
## nginx configuration
## Ref: https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/nginx-configuration/index.md
##

## Overrides for generated resource names
# See templates/_helpers.tpl
# nameOverride:
# fullnameOverride:

controller:
  name: controller
  image:
    registry: registry.cn-beijing.aliyuncs.com/dotbalo
    image: controller
    # for backwards compatibility consider setting the full image url via the repository value below
    # use *either* current default registry/image or repository format or installing chart by providing the values.yaml will fail
    # repository:
    tag: "v0.40.2"
#    digest: sha256:a1e4efc107be0bb78f32eaec37bef17d7a0c81bec8066cdf2572508d21351d0b
    pullPolicy: IfNotPresent
    # www-data -> uid 101
    runAsUser: 101
    allowPrivilegeEscalation: true

  # Use an existing PSP instead of creating one
  existingPsp: ""

  # Configures the controller container name
  containerName: controller

  # Configures the ports the nginx-controller listens on
  containerPort:
    http: 80
    https: 443

  # Will add custom configuration options to Nginx https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/
  config: {}

  ## Annotations to be added to the controller config configuration configmap
  ##
  configAnnotations: {}

  # Will add custom headers before sending traffic to backends according to https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/customization/custom-headers
  proxySetHeaders: {}

  # Will add custom headers before sending response traffic to the client according to: https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/#add-headers
  addHeaders: {}

  # Optionally customize the pod dnsConfig.
  dnsConfig: {}

  # 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

  # Bare-metal considerations via the host network https://kubernetes.github.io/ingress-nginx/deploy/baremetal/#via-the-host-network
  # Ingress status was blank because there is no Service exposing the NGINX Ingress controller in a configuration using the host network, the default --publish-service flag used in standard cloud setups does not apply
  reportNodeInternalIp: false

  # 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

  ## Use host ports 80 and 443
  ## Disabled by default
  ##
  hostPort:
    enabled: false
    ports:
      http: 80
      https: 443

  ## Election ID to use for status update
  ##
  electionID: ingress-controller-leader

  ## Name of the ingress class to route through this controller
  ##
  ingressClass: ingress-nginx

  # This section refers to the creation of the IngressClass resource
  # IngressClass resources are supported since k8s >= 1.18
  ingressClassResource:
    enabled: false
    default: false

    # Parameters is a link to a custom resource containing additional
    # configuration for the controller. This is optional if the controller
    # does not require extra parameters.
    parameters: {}

  # labels to add to the pod container metadata
  podLabels: {}
  #  key: value

  ## Security Context policies for controller pods
  ##
  podSecurityContext: {}

  ## See https://kubernetes.io/docs/tasks/administer-cluster/sysctl-cluster/ for
  ## notes on enabling and using sysctls
  ###
  sysctls: {}
  # sysctls:
  #   "net.core.somaxconn": "8192"

  ## Allows customization of the source of the IP address or FQDN to report
  ## in the ingress status field. By default, it reads the information provided
  ## by the service. If disable, the status field reports the IP address of the
  ## node or nodes where an ingress controller pod is running.
  publishService:
    enabled: true
    ## 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

  ## Allows customization of the configmap / nginx-configmap namespace
  ##
  configMapNamespace: ""   # defaults to .Release.Namespace

  ## Allows customization of the tcp-services-configmap
  ##
  tcp:
    configMapNamespace: ""   # defaults to .Release.Namespace
    ## Annotations to be added to the tcp config configmap
    annotations: {}

  ## Allows customization of the udp-services-configmap
  ##
  udp:
    configMapNamespace: ""   # defaults to .Release.Namespace
    ## Annotations to be added to the udp config configmap
    annotations: {}

  # Maxmind license key to download GeoLite2 Databases
  # https://blog.maxmind.com/2019/12/18/significant-changes-to-accessing-and-using-geolite2-databases
  maxmindLicenseKey: ""

  ## 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

  ## Annotations to be added to the controller Deployment or DaemonSet
  ##
  annotations: {}
  #  keel.sh/pollSchedule: "@every 60m"

  ## Labels to be added to the controller Deployment or DaemonSet
  ##
  labels: {}
  #  keel.sh/policy: patch
  #  keel.sh/trigger: poll


  # 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: []
  #  - key: "key"
  #    operator: "Equal|Exists"
  #    value: "value"
  #    effect: "NoSchedule|PreferNoSchedule|NoExecute(1.6 only)"

  ## Affinity and anti-affinity
  ## Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
  ##
  affinity: {}
    # # An example of preferred pod anti-affinity, weight is in the range 1-100
    # podAntiAffinity:
    #   preferredDuringSchedulingIgnoredDuringExecution:
    #   - weight: 100
    #     podAffinityTerm:
    #       labelSelector:
    #         matchExpressions:
    #         - key: app.kubernetes.io/name
    #           operator: In
    #           values:
    #           - ingress-nginx
    #         - key: app.kubernetes.io/instance
    #           operator: In
    #           values:
    #           - ingress-nginx
    #         - key: app.kubernetes.io/component
    #           operator: In
    #           values:
    #           - controller
    #       topologyKey: kubernetes.io/hostname

    # # An example of required pod anti-affinity
    # podAntiAffinity:
    #   requiredDuringSchedulingIgnoredDuringExecution:
    #   - labelSelector:
    #       matchExpressions:
    #       - key: app.kubernetes.io/name
    #         operator: In
    #         values:
    #         - ingress-nginx
    #       - key: app.kubernetes.io/instance
    #         operator: In
    #         values:
    #         - ingress-nginx
    #       - key: app.kubernetes.io/component
    #         operator: In
    #         values:
    #         - controller
    #     topologyKey: "kubernetes.io/hostname"

  ## Topology spread constraints rely on node labels to identify the topology domain(s) that each Node is in.
  ## Ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-topology-spread-constraints/
  ##
  topologySpreadConstraints: []
    # - maxSkew: 1
    #   topologyKey: failure-domain.beta.kubernetes.io/zone
    #   whenUnsatisfiable: DoNotSchedule
    #   labelSelector:
    #     matchLabels:
    #       app.kubernetes.io/instance: ingress-nginx-internal

  ## terminationGracePeriodSeconds
  ## wait up to five minutes for the drain of connections
  ##
  terminationGracePeriodSeconds: 300

  ## Node labels for controller pod assignment
  ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
  ##
  nodeSelector:
    kubernetes.io/os: linux
    ingress: "true"

  ## Liveness and readiness probe values
  ## Ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes
  ##
  # startupProbe:
  #   httpGet:
  #     # should match container.healthCheckPath
  #     path: "/healthz"
  #     port: 10254
  #     scheme: HTTP
  #   initialDelaySeconds: 5
  #   periodSeconds: 5
  #   timeoutSeconds: 2
  #   successThreshold: 1
  #   failureThreshold: 5
  livenessProbe:
    httpGet:
      # should match container.healthCheckPath
      path: "/healthz"
      port: 10254
      scheme: HTTP
    initialDelaySeconds: 10
    periodSeconds: 10
    timeoutSeconds: 1
    successThreshold: 1
    failureThreshold: 5
  readinessProbe:
    httpGet:
      # should match container.healthCheckPath
      path: "/healthz"
      port: 10254
      scheme: HTTP
    initialDelaySeconds: 10
    periodSeconds: 10
    timeoutSeconds: 1
    successThreshold: 1
    failureThreshold: 3


  # Path of the health check endpoint. All requests received on the port defined by
  # the healthz-port parameter are forwarded internally to this path.
  healthCheckPath: "/healthz"

  ## Annotations to be added to controller pods
  ##
  podAnnotations: {}

  replicaCount: 1

  minAvailable: 1

  # Define requests resources to avoid probe issues due to CPU utilization in busy nodes
  # ref: https://github.com/kubernetes/ingress-nginx/issues/4735#issuecomment-551204903
  # Ideally, there should be no limits.
  # https://engineering.indeedblog.com/blog/2019/12/cpu-throttling-regression-fix/
  resources:
  #  limits:
  #    cpu: 100m
  #    memory: 90Mi
    requests:
      cpu: 100m
      memory: 90Mi

  # Mutually exclusive with keda autoscaling
  autoscaling:
    enabled: false
    minReplicas: 1
    maxReplicas: 11
    targetCPUUtilizationPercentage: 50
    targetMemoryUtilizationPercentage: 50

  autoscalingTemplate: []
  # Custom or additional autoscaling metrics
  # ref: https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/#support-for-custom-metrics
  # - type: Pods
  #   pods:
  #     metric:
  #       name: nginx_ingress_controller_nginx_process_requests_total
  #     target:
  #       type: AverageValue
  #       averageValue: 10000m

  # Mutually exclusive with hpa autoscaling
  keda:
    apiVersion: "keda.sh/v1alpha1"
  # apiVersion changes with keda 1.x vs 2.x
  # 2.x = keda.sh/v1alpha1
  # 1.x = keda.k8s.io/v1alpha1
    enabled: false
    minReplicas: 1
    maxReplicas: 11
    pollingInterval: 30
    cooldownPeriod: 300
    restoreToOriginalReplicaCount: false
    scaledObject:
      annotations: {}
      # Custom annotations for ScaledObject resource
      #  annotations:
      # key: value
    triggers: []
 #     - type: prometheus
 #       metadata:
 #         serverAddress: http://<prometheus-host>:9090
 #         metricName: http_requests_total
 #         threshold: ‘100‘
 #         query: sum(rate(http_requests_total{deployment="my-deployment"}[2m]))

    behavior: {}
 #     scaleDown:
 #       stabilizationWindowSeconds: 300
 #       policies:
 #       - type: Pods
 #         value: 1
 #         periodSeconds: 180
 #     scaleUp:
 #       stabilizationWindowSeconds: 300
 #       policies:
 #       - type: Pods
 #         value: 2
 #         periodSeconds: 60

  ## Enable mimalloc as a drop-in replacement for malloc.
  ## ref: https://github.com/microsoft/mimalloc
  ##
  enableMimalloc: true

  ## Override NGINX template
  customTemplate:
    configMapName: ""
    configMapKey: ""

  service:
    enabled: true

    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: ""

    # Must be either "None" or "ClientIP" if set. Kubernetes will default to "None".
    # Ref: https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
    # sessionAffinity: ""

    # specifies the health check node port (numeric port number) for the service. If healthCheckNodePort isn’t specified,
    # the service controller allocates a port from your cluster’s NodePort range.
    # Ref: https://kubernetes.io/docs/tasks/access-application-cluster/create-external-load-balancer/#preserving-the-client-source-ip
    # healthCheckNodePort: 0

    ports:
      http: 80
      https: 443

    targetPorts:
      http: http
      https: https

    type: LoadBalancer

    # type: NodePort
    # nodePorts:
    #   http: 32080
    #   https: 32443
    #   tcp:
    #     8080: 32808
    nodePorts:
      http: ""
      https: ""
      tcp: {}
      udp: {}

    ## Enables an additional internal load balancer (besides the external one).
    ## Annotations are mandatory for the load balancer to come up. Varies with the cloud service.
    internal:
      enabled: false
      annotations: {}

      # loadBalancerIP: ""

      ## Restrict access For LoadBalancer service. Defaults to 0.0.0.0/0.
      loadBalancerSourceRanges: []

      ## 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: ""

  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;‘]

  admissionWebhooks:
    annotations: {}
    enabled: true
    failurePolicy: Fail
    # timeoutSeconds: 10
    port: 9443
    certificate: "/usr/local/certificates/cert"
    key: "/usr/local/certificates/key"
    namespaceSelector: {}
    objectSelector: {}

    # Use an existing PSP instead of creating one
    existingPsp: ""

    service:
      annotations: {}
      # clusterIP: ""
      externalIPs: []
      # loadBalancerIP: ""
      loadBalancerSourceRanges: []
      servicePort: 443
      type: ClusterIP

    patch:
      enabled: true
      image:
        registry: registry.cn-beijing.aliyuncs.com/dotbalo
        image: kube-webhook-certgen
        # for backwards compatibility consider setting the full image url via the repository value below
        # use *either* current default registry/image or repository format or installing chart by providing the values.yaml will fail
        # repository:
        tag: v1.5.1
        pullPolicy: IfNotPresent
      ## Provide a priority class name to the webhook patching job
      ##
      priorityClassName: ""
      podAnnotations: {}
      nodeSelector: {}
      tolerations: []
      runAsUser: 2000

  metrics:
    port: 10254
    # if this port is changed, change healthz-port: in extraArgs: accordingly
    enabled: false

    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: 10254
      type: ClusterIP
      # externalTrafficPolicy: ""
      # nodePort: ""

    serviceMonitor:
      enabled: false
      additionalLabels: {}
      # The label to use to retrieve the job name from.
      # jobLabel: "app.kubernetes.io/name"
      namespace: ""
      namespaceSelector: {}
      # Default: scrape .Release.Namespace only
      # To scrape all, use the following:
      # namespaceSelector:
      #   any: true
      scrapeInterval: 30s
      # honorLabels: true
      targetLabels: []
      metricRelabelings: []

    prometheusRule:
      enabled: false
      additionalLabels: {}
      # namespace: ""
      rules: []
        # # These are just examples rules, please adapt them to your needs
        # - alert: NGINXConfigFailed
        #   expr: count(nginx_ingress_controller_config_last_reload_successful == 0) > 0
        #   for: 1s
        #   labels:
        #     severity: critical
        #   annotations:
        #     description: bad ingress config - nginx config test failed
        #     summary: uninstall the latest ingress changes to allow config reloads to resume
        # - alert: NGINXCertificateExpiry
        #   expr: (avg(nginx_ingress_controller_ssl_expire_time_seconds) by (host) - time()) < 604800
        #   for: 1s
        #   labels:
        #     severity: critical
        #   annotations:
        #     description: ssl certificate(s) will expire in less then a week
        #     summary: renew expiring certificates to avoid downtime
        # - alert: NGINXTooMany500s
        #   expr: 100 * ( sum( nginx_ingress_controller_requests{status=~"5.+"} ) / sum(nginx_ingress_controller_requests) ) > 5
        #   for: 1m
        #   labels:
        #     severity: warning
        #   annotations:
        #     description: Too many 5XXs
        #     summary: More than 5% of all requests returned 5XX, this requires your attention
        # - alert: NGINXTooMany400s
        #   expr: 100 * ( sum( nginx_ingress_controller_requests{status=~"4.+"} ) / sum(nginx_ingress_controller_requests) ) > 5
        #   for: 1m
        #   labels:
        #     severity: warning
        #   annotations:
        #     description: Too many 4XXs
        #     summary: More than 5% of all requests returned 4XX, this requires your attention

  ## Improve connection draining when ingress controller pod is deleted using a lifecycle hook:
  ## With this new hook, we increased the default terminationGracePeriodSeconds from 30 seconds
  ## to 300, allowing the draining of connections up to five minutes.
  ## If the active connections end before that, the pod will terminate gracefully at that time.
  ## To effectively take advantage of this feature, the Configmap feature
  ## worker-shutdown-timeout new value is 240s instead of 10s.
  ##
  lifecycle:
    preStop:
      exec:
        command:
          - /wait-shutdown

  priorityClassName: ""

## Rollback limit
##
revisionHistoryLimit: 10

## Default 404 backend
##
defaultBackend:
  ##
  enabled: false

  name: defaultbackend
  image:
    registry: k8s.gcr.io
    image: defaultbackend-amd64
    # for backwards compatibility consider setting the full image url via the repository value below
    # use *either* current default registry/image or repository format or installing chart by providing the values.yaml will fail
    # repository:
    tag: "1.5"
    pullPolicy: IfNotPresent
    # nobody user -> uid 65534
    runAsUser: 65534
    runAsNonRoot: true
    readOnlyRootFilesystem: true
    allowPrivilegeEscalation: false

  # Use an existing PSP instead of creating one
  existingPsp: ""

  extraArgs: {}

  serviceAccount:
    create: true
    name: ""
    automountServiceAccountToken: true
  ## Additional environment variables to set for defaultBackend pods
  extraEnvs: []

  port: 8080

  ## Readiness and liveness probes for default backend
  ## Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/
  ##
  livenessProbe:
    failureThreshold: 3
    initialDelaySeconds: 30
    periodSeconds: 10
    successThreshold: 1
    timeoutSeconds: 5
  readinessProbe:
    failureThreshold: 6
    initialDelaySeconds: 0
    periodSeconds: 5
    successThreshold: 1
    timeoutSeconds: 5

  ## 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: {}

  ## Security Context policies for controller pods
  ## See https://kubernetes.io/docs/tasks/administer-cluster/sysctl-cluster/ for
  ## notes on enabling and using sysctls
  ##
  podSecurityContext: {}

  # 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

  extraVolumeMounts: []
  ## Additional volumeMounts to the default backend container.
  #  - name: copy-portal-skins
  #   mountPath: /var/lib/lemonldap-ng/portal/skins

  extraVolumes: []
  ## Additional volumes to the default backend pod.
  #  - name: copy-portal-skins
  #    emptyDir: {}

  autoscaling:
    annotations: {}
    enabled: false
    minReplicas: 1
    maxReplicas: 2
    targetCPUUtilizationPercentage: 50
    targetMemoryUtilizationPercentage: 50

  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
  scope: false

# If true, create & use Pod Security Policy resources
# https://kubernetes.io/docs/concepts/policy/pod-security-policy/
podSecurityPolicy:
  enabled: false

serviceAccount:
  create: true
  name: ""
  automountServiceAccountToken: true

## 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"

# A base64ed Diffie-Hellman parameter
# This can be generated with: openssl dhparam 4096 2> /dev/null | base64
# Ref: https://github.com/krmichel/ingress-nginx/blob/master/docs/examples/customization/ssl-dh-param
dhParam:
#_________________________________________________________________________________________#


5.1 找到:
 ingressClass: ingress-nginx
 改为:
 ingressClass: nginx

#修改完毕 


#安装helm[这是将ingress安装到了k8s-master03节点]
kubectl create ns ingress-nginx       
kubectl label node k8s-master03 ingress=ture
helm install ingress-nginx -n ingress-nginx . 


#检查
[root@k8s-master01 ingress-nginx]# kubectl get pod -n ingress-nginx
NAME                             READY   STATUS    RESTARTS   AGE
ingress-nginx-controller-ptxz6   1/1     Running   0          31s
ingress-nginx-controller-vwd4g   1/1     Running   0          31s


[root@k8s-master01 ingress-nginx]# kubectl get pod -n ingress-nginx -o wide
NAME                          READY    STATUS    RESTARTS   AGE   IP             NODE       NOMINATED    READINESS
ingress-nginx-controller-ptxz6   1/1   Running   0          22m   192.168.3.84   k8s-node01   <none> 
ingress-nginx-controller-vwd4g   1/1   Running   0          22m   192.168.3.85   k8s-node02   <none> 


#安装报错:
Error: rendered manifests contain a resource that already exists. Unable to continue with install: ClusterRole "ingress-nginx" in namespace "" exists and cannot be imported into the current release: invalid ownership metadata; annotation validation error: key "meta.helm.sh/release-namespace" must equal "ingress": current value is "ingress-nginx"

可以先删除 ingress-nginx  在创建 重新安装执行上面的 安装helm 步骤  



#正确的安装结果:
NAME: ingress-nginx
LAST DEPLOYED: Thu Jul 22 11:40:06 2021
NAMESPACE: ingress-nginx
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
The ingress-nginx controller has been installed.
It may take a few minutes for the LoadBalancer IP to be available.
You can watch the status by running ‘kubectl --namespace ingress-nginx get services -o wide -w ingress-nginx-controller‘

An example Ingress that makes use of the controller:

  apiVersion: networking.k8s.io/v1beta1     # 建议networking.k8s.io/v1
  kind: Ingress 
  metadata:
    annotations:
      kubernetes.io/ingress.class: "nginx" #声明用什么进行解析,这里是通过nginx解析。这个在values.yaml配置
    name: example
    namespace: foo
  spec:
    rules:
      - host: www.example.com
        http:
          paths:
            - backend:
                serviceName: exampleService
                servicePort: 80
              path: /
    # This section is only required if TLS is to be enabled for the Ingress
    tls:
        - hosts:
            - www.example.com
          secretName: example-tls

If TLS is enabled for the Ingress, a Secret containing the certificate and key must also be provided:

  apiVersion: v1
  kind: Secret
  metadata:
    name: example-tls
    namespace: foo
  data:
    tls.crt: <base64 encoded cert>
    tls.key: <base64 encoded key>
  type: kubernetes.io/tls

使用ingress 部署一个nginx站点

# 1.创建nginx pod 名称: nginx-nodeport.yaml
cat nginx-nodeport.yaml 

apiVersion: v1
kind: Service
metadata:
  name: ingress-nginx
  namespace: ingress-nginx
  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
    - name: https
      port: 443
      targetPort: 443
      protocol: TCP
  selector:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx


# 2.创建nginx svc和deploy   
# cat nginx-nodeport-service.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
 name: nginx-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-app-svc
spec:
  type: ClusterIP
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80
  selector:
    app: nginx




# 3.创建nginx ingress

cat ingress-app.yaml
 
# 内容
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: nginx-app-ingress
spec:
  rules:
  - host: www.chenleilei.net
    http:
      paths:
      - path: /
        backend:
          serviceName: nginx-app-svc
          servicePort: 80




## 在已安装的ingress服务器上发布ingress网站
kubectl create -f nginx-nodeport.yaml 
kubectl create -f nginx-nodeport-service.yaml
kubectl create -f ingress-app.yaml



## 删除ingress网站:
kubectl delete -f nginx-nodeport.yaml 
kubectl delete -f nginx-nodeport-service.yaml
kubectl delete -f ingress-app.yaml

kubernetes ingress部署

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原文地址:https://www.cnblogs.com/superlinux/p/15048907.html

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