（四）k8s实战-服务发现
一、Service
1、配置文件
apiVersion: v1
kind: Service
metadata:
name: nginx-svc
labels:
app: nginx-svc
spec:
ports:
- name: http # service 端口配置的名称
protocol: TCP # 端口绑定的协议，支持 TCP、UDP、SCTP，默认为 TCP
port: 80 # service 自己的端口
targetPort: 9527 # 目标 pod 的端口
- name: https
port: 443
protocol: TCP
targetPort: 443
selector: # 选中当前 service 匹配哪些 pod，对哪些 pod 的东西流量进行代理
app: nginx
2、命令操作
# 创建 service
kubectl create -f nginx-svc.yaml
# 查看 service 信息，通过 service 的 cluster ip 进行访问
kubectl get svc
# 查看 pod 信息，通过 pod 的 ip 进行访问
kubectl get po -o wide
# 创建其他 pod 通过 service name 进行访问（推荐）
kubectl exec -it busybox -- sh
curl http://nginx-svc
# 默认在当前 namespace 中访问，如果需要跨 namespace 访问 pod，则在 service name 后面加上 . 即可
curl http://nginx-svc.default
3、代理 k8s 外部服务
实现方式：
- 编写 service 配置文件时，不指定 selector 属性
- 自己创建 endpoint
endpoint 配置文件：
apiVersion: v1
kind: Endpoints
metadata:
labels:
app: nginx # 与 service 一致
name: nginx-svc-external # 与 service 一致
namespace: default # 与 service 一致
subsets:
- addresses:
- ip: 120.78.159.117 # 目标 ip 地址
ports: # 与 service 一致
- name: web
port: 80
protocol: TCP
各环境访问名称统一
访问 k8s 集群外的其他服务
项目迁移
4、反向代理外部域名
apiVersion: v1
kind: Service
metadata:
labels:
app: nginx # 与 service 一致
name: nginx-svc-external # 与 service 一致
spec:
type: ExternalName
externalName: www.wolfcode.cn # 目标 域名
5、常用类型
ClusterIP
只能在集群内部使用，不配置类型的话默认就是 ClusterIP
ExternalName
返回定义的 CNAME 别名，可以配置为域名
NodePort
会在所有安装了 kube-proxy 的节点都绑定一个端口，此端口可以代理至对应的 Pod，集群外部可以使用任意节点 ip + NodePort 的端口号访问到集群中对应 Pod 中的服务。
当类型设置为 NodePort 后，可以在 ports 配置中增加 nodePort 配置指定端口，需要在下方的端口范围内，如果不指定会随机指定端口
端口范围：30000~32767
端口范围配置在 /usr/lib/systemd/system/kube-apiserver.service 文件中
LoadBalancer
使用云服务商（阿里云、腾讯云等）提供的负载均衡器服务
二、Ingress
1、安装 ingress-nginx
1、安装 Helm
# 下载Helm二进制文件
wget https://get.helm.sh/helm-v3.10.2-linux-arm64.tar.gz
# 解压
tar -zxvf helm-v3.10.2-linux-amd64.tar.gz
#在解压目录中找到helm程序，移动到需要的目录中
mv linux-amd64/helm /usr/local/bin/helm
# 测试是否安装成功
helm version
# 添加仓库
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
# 查看仓库列表
helm repo list
# 搜索 ingress-nginx
helm search repo ingress-nginx
2、下载安装包
helm pull ingress-nginx/ingress-nginx
3、配置参数
# 将下载好的安装包解压
tar xf ingress-nginx-xxx.tgz
# 解压后，进入解压完成的目录
cd ingress-nginx
# 修改 values.yaml
镜像地址：修改为国内镜像
registry: registry.cn-hangzhou.aliyuncs.com
image: arm64v8/google_containers/nginx-ingress-controller
registry: registry.cn-hangzhou.aliyuncs.com
image: arm64v8/google_containers/kube-webhook-certgen
tag: v1.5.0
hostNetwork: true
dnsPolicy: ClusterFirstWithHostNet
修改部署配置的 kind: DaemonSet
nodeSelector:
ingress: "true" # 增加选择器，如果 node 上有 ingress=true 就部署
将 admissionWebhooks.enabled 修改为 false
将 service 中的 type 由 LoadBalancer 修改为 ClusterIP，如果服务器是云平台才用 LoadBalancer
修改后的values.yaml
## nginx configuration
## Ref: https://github.com/kubernetes/ingress-nginx/blob/main/docs/user-guide/nginx-configuration/index.md
##
## Overrides for generated resource names
# See templates/_helpers.tpl
# nameOverride:
# fullnameOverride:
## Labels to apply to all resources
##
commonLabels: {}
# scmhash: abc123
# myLabel: aakkmd
controller:
name: controller
image:
## Keep false as default for now!
chroot: false
registry: registry.cn-hangzhou.aliyuncs.com
image: google_containers/nginx-ingress-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: "v1.5.1"
#digest: sha256:e5c4824e7375fcf2a393e1c03c293b69759af37a9ca6abdb91b13d78a93da8bd
#digestChroot: sha256:e0d4121e3c5e39de9122e55e331a32d5ebf8d4d257227cb93ab54a1b912a7627
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 that 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/main/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 customize the pod hostname.
hostname: {}
# -- 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: ClusterFirstWithHostNet
# -- 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 Ingress-Nginx Controller in a configuration using the host network, the default --publish-service flag used in standard cloud setups does not apply
reportNodeInternalIp: false
# -- Process Ingress objects without ingressClass annotation/ingressClassName field
# Overrides value for --watch-ingress-without-class flag of the controller binary
# Defaults to false
watchIngressWithoutClass: false
# -- Process IngressClass per name (additionally as per spec.controller).
ingressClassByName: false
# -- This configuration enables Topology Aware Routing feature, used together with service annotation service.kubernetes.io/topology-aware-hints="auto"
# Defaults to false
enableTopologyAwareRouting: false
# -- This configuration defines if Ingress Controller should allow users to set
# their own *-snippet annotations, otherwise this is forbidden / dropped
# when users add those annotations.
# Global snippets in ConfigMap are still respected
allowSnippetAnnotations: true
# -- 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:
# -- Enable 'hostPort' or not
enabled: false
ports:
# -- 'hostPort' http port
http: 80
# -- 'hostPort' https port
https: 443
# -- Election ID to use for status update, by default it uses the controller name combined with a suffix of 'leader'
electionID: ""
## This section refers to the creation of the IngressClass resource
## IngressClass resources are supported since k8s >= 1.18 and required since k8s >= 1.19
ingressClassResource:
# -- Name of the ingressClass
name: nginx
# -- Is this ingressClass enabled or not
enabled: true
# -- Is this the default ingressClass for the cluster
default: false
# -- Controller-value of the controller that is processing this ingressClass
controllerValue: "k8s.io/ingress-nginx"
# -- 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: {}
# -- For backwards compatibility with ingress.class annotation, use ingressClass.
# Algorithm is as follows, first ingressClassName is considered, if not present, controller looks for ingress.class annotation
ingressClass: nginx
# -- 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:
# -- Enable 'publishService' or not
enabled: true
# -- Allows overriding of the publish service to bind to
# Must be /
pathOverride: ""
# Limit the scope of the controller to a specific namespace
scope:
# -- Enable 'scope' or not
enabled: false
# -- Namespace to limit the controller to; defaults to $(POD_NAMESPACE)
namespace: ""
# -- When scope.enabled == false, instead of watching all namespaces, we watching namespaces whose labels
# only match with namespaceSelector. Format like foo=bar. Defaults to empty, means watching all namespaces.
namespaceSelector: ""
# -- Allows customization of the configmap / nginx-configmap namespace; defaults to $(POD_NAMESPACE)
configMapNamespace: ""
tcp:
# -- Allows customization of the tcp-services-configmap; defaults to $(POD_NAMESPACE)
configMapNamespace: ""
# -- Annotations to be added to the tcp config configmap
annotations: {}
udp:
# -- Allows customization of the udp-services-configmap; defaults to $(POD_NAMESPACE)
configMapNamespace: ""
# -- 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 Ingress-Nginx Controller
# E.g. to specify the default SSL certificate you can use
extraArgs: {}
## extraArgs:
## default-ssl-certificate: "/"
# -- Additional environment variables to set
extraEnvs: []
# extraEnvs:
# - name: FOO
# valueFrom:
# secretKeyRef:
# key: FOO
# name: secret-resource
# -- Use a `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 and other resources that do not have option to specify labels
##
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 rules for server scheduling to nodes
## 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: topology.kubernetes.io/zone
# whenUnsatisfiable: DoNotSchedule
# labelSelector:
# matchLabels:
# app.kubernetes.io/instance: ingress-nginx-internal
# -- `terminationGracePeriodSeconds` to avoid killing pods before we are ready
## wait up to five minutes for the drain of connections
##
terminationGracePeriodSeconds: 300
# -- Node labels for controller pod assignment
## Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/
##
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"
# -- Address to bind the health check endpoint.
# It is better to set this option to the internal node address
# if the Ingress-Nginx Controller is running in the `hostNetwork: true` mode.
healthCheckHost: ""
# -- Annotations to be added to controller pods
##
podAnnotations: {}
replicaCount: 1
# -- Minimum available pods set in PodDisruptionBudget.
# Define either 'minAvailable' or 'maxUnavailable', never both.
minAvailable: 1
# -- Maximum unavalaile pods set in PodDisruptionBudget. If set, 'minAvailable' is ignored.
# maxUnavailable: 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
annotations: {}
minReplicas: 1
maxReplicas: 11
targetCPUUtilizationPercentage: 50
targetMemoryUtilizationPercentage: 50
behavior: {}
# scaleDown:
# stabilizationWindowSeconds: 300
# policies:
# - type: Pods
# value: 1
# periodSeconds: 180
# scaleUp:
# stabilizationWindowSeconds: 300
# policies:
# - type: Pods
# value: 2
# periodSeconds: 60
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
# fallback:
# failureThreshold: 3
# replicas: 11
restoreToOriginalReplicaCount: false
scaledObject:
annotations: {}
# Custom annotations for ScaledObject resource
# annotations:
# key: value
triggers: []
# - type: prometheus
# metadata:
# serverAddress: http://: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
# -- If enabled is adding an appProtocol option for Kubernetes service. An appProtocol field replacing annotations that were
# using for setting a backend protocol. Here is an example for AWS: service.beta.kubernetes.io/aws-load-balancer-backend-protocol: http
# It allows choosing the protocol for each backend specified in the Kubernetes service.
# See the following GitHub issue for more details about the purpose: https://github.com/kubernetes/kubernetes/issues/40244
# Will be ignored for Kubernetes versions older than 1.20
##
appProtocol: true
annotations: {}
labels: {}
# clusterIP: ""
# -- List of IP addresses at which the controller services are available
## Ref: https://kubernetes.io/docs/concepts/services-networking/service/#external-ips
##
externalIPs: []
# -- Used by cloud providers to connect the resulting `LoadBalancer` to a pre-existing static IP according to https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer
loadBalancerIP: ""
loadBalancerSourceRanges: []
# -- Used by cloud providers to select a load balancer implementation other than the cloud provider default. https://kubernetes.io/docs/concepts/services-networking/service/#load-balancer-class
loadBalancerClass: ""
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
# -- Represents the dual-stack-ness requested or required by this Service. Possible values are
# SingleStack, PreferDualStack or RequireDualStack.
# The ipFamilies and clusterIPs fields depend on the value of this field.
## Ref: https://kubernetes.io/docs/concepts/services-networking/dual-stack/
ipFamilyPolicy: "SingleStack"
# -- List of IP families (e.g. IPv4, IPv6) assigned to the service. This field is usually assigned automatically
# based on cluster configuration and the ipFamilyPolicy field.
## Ref: https://kubernetes.io/docs/concepts/services-networking/dual-stack/
ipFamilies:
- IPv4
ports:
http: 80
https: 443
targetPorts:
http: http
https: https
type: ClusterIP
## type: NodePort
## nodePorts:
## http: 32080
## https: 32443
## tcp:
## 8080: 32808
nodePorts:
http: ""
https: ""
tcp: {}
udp: {}
external:
enabled: true
internal:
# -- Enables an additional internal load balancer (besides the external one).
enabled: false
# -- Annotations are mandatory for the load balancer to come up. Varies with the cloud service.
annotations: {}
# -- Used by cloud providers to connect the resulting internal LoadBalancer to a pre-existing static IP. Make sure to add to the service the needed annotation to specify the subnet which the static IP belongs to. For instance, `networking.gke.io/internal-load-balancer-subnet` for GCP and `service.beta.kubernetes.io/aws-load-balancer-subnets` for AWS.
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: ""
# -- Custom port mapping for internal service
ports: {}
# http: 80
# https: 443
# -- Custom target port mapping for internal service
targetPorts: {}
# http: http
# https: https
# shareProcessNamespace enables process namespace sharing within the pod.
# This can be used for example to signal log rotation using `kill -USR1` from a sidecar.
shareProcessNamespace: false
# -- Additional containers to be added to the controller pod.
# See https://github.com/lemonldap-ng-controller/lemonldap-ng-controller as example.
extraContainers: []
# - 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
# -- Additional volumeMounts to the controller main container.
extraVolumeMounts: []
# - name: copy-portal-skins
# mountPath: /var/lib/lemonldap-ng/portal/skins
# -- Additional volumes to the controller pod.
extraVolumes: []
# - name: copy-portal-skins
# emptyDir: {}
# -- Containers, which are run before the app containers are started.
extraInitContainers: []
# - name: init-myservice
# image: busybox
# command: ['sh', '-c', 'until nslookup myservice; do echo waiting for myservice; sleep 2; done;']
# -- Modules, which are mounted into the core nginx image. See values.yaml for a sample to add opentelemetry module
extraModules: []
# - name: mytestmodule
# image: registry.k8s.io/ingress-nginx/mytestmodule
# containerSecurityContext:
# allowPrivilegeEscalation: false
#
# The image must contain a `/usr/local/bin/init_module.sh` executable, which
# will be executed as initContainers, to move its config files within the
# mounted volume.
opentelemetry:
enabled: false
image: registry.k8s.io/ingress-nginx/opentelemetry:v20230527@sha256:fd7ec835f31b7b37187238eb4fdad4438806e69f413a203796263131f4f02ed0
containerSecurityContext:
allowPrivilegeEscalation: false
admissionWebhooks:
annotations: {}
# ignore-check.kube-linter.io/no-read-only-rootfs: "This deployment needs write access to root filesystem".
## Additional annotations to the admission webhooks.
## These annotations will be added to the ValidatingWebhookConfiguration and
## the Jobs Spec of the admission webhooks.
enabled: false
# -- Additional environment variables to set
extraEnvs: []
# extraEnvs:
# - name: FOO
# valueFrom:
# secretKeyRef:
# key: FOO
# name: secret-resource
# -- Admission Webhook failure policy to use
failurePolicy: Fail
# timeoutSeconds: 10
port: 8443
certificate: "/usr/local/certificates/cert"
key: "/usr/local/certificates/key"
namespaceSelector: {}
objectSelector: {}
# -- Labels to be added to admission webhooks
labels: {}
# -- Use an existing PSP instead of creating one
existingPsp: ""
networkPolicyEnabled: false
service:
annotations: {}
# clusterIP: ""
externalIPs: []
# loadBalancerIP: ""
loadBalancerSourceRanges: []
servicePort: 443
type: ClusterIP
createSecretJob:
securityContext:
allowPrivilegeEscalation: false
resources: {}
# limits:
# cpu: 10m
# memory: 20Mi
# requests:
# cpu: 10m
# memory: 20Mi
patchWebhookJob:
securityContext:
allowPrivilegeEscalation: false
resources: {}
patch:
enabled: true
image:
registry: registry.cn-hangzhou.aliyuncs.com
image: google_containers/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
#digest: sha256:543c40fd093964bc9ab509d3e791f9989963021f1e9e4c9c7b6700b02bfb227b
pullPolicy: IfNotPresent
# -- Provide a priority class name to the webhook patching job
##
priorityClassName: ""
podAnnotations: {}
nodeSelector:
kubernetes.io/os: linux
tolerations: []
# -- Labels to be added to patch job resources
labels: {}
securityContext:
runAsNonRoot: true
runAsUser: 2000
fsGroup: 2000
# Use certmanager to generate webhook certs
certManager:
enabled: false
# self-signed root certificate
rootCert:
# default to be 5y
duration: ""
admissionCert:
# default to be 1y
duration: ""
# issuerRef:
# name: "issuer"
# kind: "ClusterIssuer"
metrics:
port: 10254
portName: metrics
# if this port is changed, change healthz-port: in extraArgs: accordingly
enabled: false
service:
annotations: {}
# prometheus.io/scrape: "true"
# prometheus.io/port: "10254"
# -- Labels to be added to the metrics service resource
labels: {}
# clusterIP: ""
# -- List of IP addresses at which the stats-exporter service is available
## Ref: https://kubernetes.io/docs/concepts/services-networking/service/#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: []
relabelings: []
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: registry.k8s.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
# -- 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: {}
# -- Security Context policies for controller pods
# See https://kubernetes.io/docs/tasks/administer-cluster/sysctl-cluster/ for
# notes on enabling and using sysctls
##
podSecurityContext: {}
# -- Security Context policies for controller main container.
# See https://kubernetes.io/docs/tasks/administer-cluster/sysctl-cluster/ for
# notes on enabling and using sysctls
##
containerSecurityContext: {}
# -- Labels to add to the pod container metadata
podLabels: {}
# key: value
# -- Node labels for default backend pod assignment
## Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/
##
nodeSelector:
kubernetes.io/os: linux
# -- 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/concepts/services-networking/service/#external-ips
##
externalIPs: []
# loadBalancerIP: ""
loadBalancerSourceRanges: []
servicePort: 80
type: ClusterIP
priorityClassName: ""
# -- Labels to be added to the default backend resources
labels: {}
## Enable RBAC as per https://github.com/kubernetes/ingress-nginx/blob/main/docs/deploy/rbac.md and https://github.com/kubernetes/ingress-nginx/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
# -- Annotations for the controller service account
annotations: {}
# -- 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/ingress-nginx/blob/main/docs/user-guide/exposing-tcp-udp-services.md
##
tcp: {}
# 8080: "default/example-tcp-svc:9000"
# -- UDP service key-value pairs
## Ref: https://github.com/kubernetes/ingress-nginx/blob/main/docs/user-guide/exposing-tcp-udp-services.md
##
udp: {}
# 53: "kube-system/kube-dns:53"
# -- Prefix for TCP and UDP ports names in ingress controller service
## Some cloud providers, like Yandex Cloud may have a requirements for a port name regex to support cloud load balancer integration
portNamePrefix: ""
# -- (string) A base64-encoded Diffie-Hellman parameter.
# This can be generated with: `openssl dhparam 4096 2> /dev/null | base64`
## Ref: https://github.com/kubernetes/ingress-nginx/tree/main/docs/examples/customization/ssl-dh-param
dhParam: ""
4、创建 Namespace
为 ingress 专门创建一个 namespace
kubectl create ns ingress-nginx
5、安装 ingress
为需要部署 ingress 的节点上加标签
kubectl label node k8s-node1 ingress=true
安装 ingress-nginx
helm install ingress-nginx -n ingress-nginx .
查看是否安装到k8s-node1
kubectl get po -n ingress-nginx -o wide
2、基本使用
1、创建一个 ingress
apiVersion: networking.k8s.io/v1
kind: Ingress # 资源类型为 Ingress
metadata:
name: wolfcode-nginx-ingress
annotations:
kubernetes.io/ingress.class: "nginx"
nginx.ingress.kubernetes.io/rewrite-target: / #将 /api 替换为 /
spec:
rules: # ingress 规则配置，可以配置多个
- host: k8s.wolfcode.cn # 域名配置，可以使用通配符 *
http:
paths: # 相当于 nginx 的 location 配置，可以配置多个
- pathType: Prefix # 路径类型，1)ImplementationSpecific:按照路径类型进行匹配,需要指定 IngressClass，具体匹配规则以 IngressClass 中的规则为准。2)Exact：精确匹配，URL需要与path完全匹配上，且区分大小写的。3)Prefix：以 / 作为分隔符来进行前缀匹配
backend:
service:
name: nginx-svc # 代理到哪个 service
port:
number: 80 # service 的端口
path: /api # 等价于 nginx 中的 location 的路径前缀匹配
测试：
本机hosts添加域名:
192.168.100.101 k8s.wolfcode.cn
浏览器输入http://k8s.wolfcode.cn/api
查看请求是否到达nginx-svc的某一个po
kubectl logs -f
2、多域名配置
apiVersion: networking.k8s.io/v1
kind: Ingress # 资源类型为 Ingress
metadata:
name: wolfcode-nginx-ingress
annotations:
kubernetes.io/ingress.class: "nginx"
nginx.ingress.kubernetes.io/rewrite-target: /
spec:
rules: # ingress 规则配置，可以配置多个
- host: k8s.wolfcode.cn # 域名配置，可以使用通配符 *
http:
paths: # 相当于 nginx 的 location 配置，可以配置多个
- pathType: Prefix # 路径类型，按照路径类型进行匹配 ImplementationSpecific 需要指定 IngressClass，具体匹配规则以 IngressClass 中的规则为准。Exact：精确匹配，URL需要与path完全匹配上，且区分大小写的。Prefix：以 / 作为分隔符来进行前缀匹配
backend:
service:
name: nginx-svc # 代理到哪个 service
port:
number: 80 # service 的端口
path: /api # 等价于 nginx 中的 location 的路径前缀匹配
- pathType: Exec # 路径类型，按照路径类型进行匹配 ImplementationSpecific 需要指定 IngressClass，具体匹配规则以 IngressClass 中的规则为准。Exact：精确匹配>，URL需要与path完全匹配上，且区分大小写的。Prefix：以 / 作为分隔符来进行前缀匹配
backend:
service:
name: nginx-svc # 代理到哪个 service
port:
number: 80 # service 的端口
path: /
- host: api.wolfcode.cn # 域名配置，可以使用通配符 *
http:
paths: # 相当于 nginx 的 location 配置，可以配置多个
- pathType: Prefix # 路径类型，按照路径类型进行匹配 ImplementationSpecific 需要指定 IngressClass，具体匹配规则以 IngressClass 中的规则为准。Exact：精确匹配>，URL需要与path完全匹配上，且区分大小写的。Prefix：以 / 作为分隔符来进行前缀匹配
backend:
service:
name: nginx-svc # 代理到哪个 service
port:
number: 80 # service 的端口
path: /