一、安装Ingress基础设置
1、生成7个yaml配置文件
这7个文件实际可以从官网下载并做少量修改，但是速度太慢了，我们直接手工建立吧
1、namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
name: ingress-nginx
2、configmap.yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: nginx-configuration
namespace: ingress-nginx
labels:
app: ingress-nginx
3、default-backend.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: default-http-backend
labels:
app: default-http-backend
namespace: ingress-nginx
spec:
replicas: 1
selector:
matchLabels:
app: default-http-backend
template:
metadata:
labels:
app: default-http-backend
spec:
terminationGracePeriodSeconds: 60
containers:
- name: default-http-backend
# Any image is permissible as long as:
# 1. It serves a 404 page at /
# 2. It serves 200 on a /healthz endpoint
image: gcr.io/google_containers/defaultbackend:1.4
livenessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 30
timeoutSeconds: 5
ports:
- containerPort: 8080
resources:
limits:
cpu: 10m
memory: 20Mi
requests:
cpu: 10m
memory: 20Mi
---
apiVersion: v1
kind: Service
metadata:
name: default-http-backend
namespace: ingress-nginx
labels:
app: default-http-backend
spec:
ports:
- port: 80
targetPort: 8080
selector:
app: default-http-backend
4、rbac.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: nginx-ingress-clusterrole
rules:
- apiGroups:
- ""
resources:
- configmaps
- endpoints
- nodes
- pods
- secrets
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- apiGroups:
- ""
resources:
- services
verbs:
- get
- list
- watch
- apiGroups:
- "extensions"
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- events
verbs:
- create
- patch
- apiGroups:
- "extensions"
resources:
- ingresses/status
verbs:
- update
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: Role
metadata:
name: nginx-ingress-role
namespace: ingress-nginx
rules:
- apiGroups:
- ""
resources:
- configmaps
- pods
- secrets
- namespaces
verbs:
- get
- apiGroups:
- ""
resources:
- configmaps
resourceNames:
# Defaults to "<election-id>-<ingress-class>"
# Here: "<ingress-controller-leader>-<nginx>"
# This has to be adapted if you change either parameter
# when launching the nginx-ingress-controller.
- "ingress-controller-leader-nginx"
verbs:
- get
- update
- apiGroups:
- ""
resources:
- configmaps
verbs:
- create
- apiGroups:
- ""
resources:
- endpoints
verbs:
- get
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: RoleBinding
metadata:
name: nginx-ingress-role-nisa-binding
namespace: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: nginx-ingress-role
subjects:
- kind: ServiceAccount
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: nginx-ingress-clusterrole-nisa-binding
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: nginx-ingress-clusterrole
subjects:
- kind: ServiceAccount
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
5、tcp-services-configmap.yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: tcp-services
namespace: ingress-nginx
6、udp-services-configmap.yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: udp-services
namespace: ingress-nginx
7、with-rbac.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-ingress-controller
namespace: ingress-nginx
spec:
replicas: 1
selector:
matchLabels:
app: ingress-nginx
template:
metadata:
labels:
app: ingress-nginx
annotations:
prometheus.io/port: '10254'
prometheus.io/scrape: 'true'
spec:
hostNetwork: true
serviceAccountName: nginx-ingress-serviceaccount
containers:
- name: nginx-ingress-controller
image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.11.0
args:
- /nginx-ingress-controller
- --default-backend-service=$(POD_NAMESPACE)/default-http-backend
- --configmap=$(POD_NAMESPACE)/nginx-configuration
- --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services
- --udp-services-configmap=$(POD_NAMESPACE)/udp-services
- --annotations-prefix=nginx.ingress.kubernetes.io
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
ports:
- name: http
containerPort: 80
- name: https
containerPort: 443
livenessProbe:
failureThreshold: 3
httpGet:
path: /healthz
port: 10254
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
readinessProbe:
failureThreshold: 3
httpGet:
path: /healthz
port: 10254
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
2、apply这7个yaml配置文件
注意namespace要先apply
[root@k8s-master03 ingresspaas]# kubectl apply -f namespace.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f configmap.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f default-backend.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f rbac.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f tcp-services-configmap.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f udp-services-configmap.yaml
[root@k8s-master03 ingresspaas]# kubectl apply -f with-rbac.yaml
注意：这些yaml文件中提到的一些镜像，国内目前无法下载, 及pull不下来， 比如我这里用到的
gcr.io/google_containers/defaultbackend:1.4 和 quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.11.0一些云盘上提供了这个下载后的tar包，下载下来后通过docker load < xx.tar 加载到各个work node节点
image.png
二、创建Deployment和Service
1、新建一个包含Deployment和Service的nginx-service.yaml文件：
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx
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
labels:
app: nginx
spec:
type: NodePort
ports:
- port: 80
targetPort: 80
nodePort: 30112
selector:
app: nginx
kubectl apply -f nginx-service.yaml
2、为service创建ingress规则
创建nginx-ingress.yaml:
---
# http
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: example-ingress
spec:
rules:
- host: example.carp.com
http:
paths:
- path: /
backend:
serviceName: nginx
servicePort: 80
---
# https
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: tls-example-ingress
spec:
tls:
- hosts:
- sslexample.carp.com
secretName: secret-tls
rules:
- host: sslexample.carp.com
http:
paths:
- path: /
backend:
serviceName: nginx
servicePort: 80
kubectl apply -f nginx-ingress.yaml
三、验证功能
[root@k8s-master03 ingresstest]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 7d7h
kubia-nodeport NodePort 10.106.151.227 <none> 80:30123/TCP 22h
nginx NodePort 10.110.64.111 <none> 80:30112/TCP 39m
[root@k8s-master03 ingresstest]# curl 10.110.64.111:80
......
<head>
<title>Welcome to nginx!</title>
......
[root@k8s-master03 ingresstest]# curl 192.168.108.88:30112
......
<head>
<title>Welcome to nginx!</title>
......
[root@k8s-master03 ingresstest]#
[root@k8s-master03 ingresstest]# ssh 192.168.100.48
......
<head>
<title>Welcome to nginx!</title>
<style>
......
[root@k8s-master ~]#
image.png
image.png
