Ingress`の入り口には、このような負荷分散プロキシサーバとしてhaproxy、nginxのと同等の、実際には、クラスタ内の別のサービスへの外部要求を転送するには、クラスタへの外部アクセスをkuberenets、イングレスコントローラはにより、リスナーとして理解することができ、クラスタから実際にあります常にKUBE-apiserverを扱う、リアルタイム知覚バックエンドサービス、ポッドを変更し、これらの変更は、情報、イングレスコントローラを組み合わせイングレスの設定を取得するときに、サービスディスカバリの役割に、リバースプロキシ、ロードバランサを更新します。
Kubernetesでは、現在、以下のプログラムを提供しています:
NodePort
ロードバランサ
侵入を
進入-nginxのを使用して、ポッドサービスを作成し、デフォルトのファイルYAML
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml
vimのmandatory.yaml
apiVersion: v1
kind: Namespace
metadata:
name: ingress-nginx
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: default-http-backend
labels:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
namespace: ingress-nginx
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
template:
metadata:
labels:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
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: k8s.gcr.io/defaultbackend-amd64:1.5
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.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
spec:
ports:
- port: 80
targetPort: 8080
selector:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
---
kind: ConfigMap
apiVersion: v1
metadata:
name: nginx-configuration
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
kind: ConfigMap
apiVersion: v1
metadata:
name: tcp-services
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
kind: ConfigMap
apiVersion: v1
metadata:
name: udp-services
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: nginx-ingress-clusterrole
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
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
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: 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
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: 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
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: nginx-ingress-clusterrole
subjects:
- kind: ServiceAccount
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nginx-ingress-controller
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
template:
metadata:
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
annotations:
prometheus.io/port: "10254"
prometheus.io/scrape: "true"
spec:
serviceAccountName: nginx-ingress-serviceaccount
hostNetwork: true
nodeSelector:
app: ingress
containers:
- name: nginx-ingress-controller
image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.20.0
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
- --publish-service=$(POD_NAMESPACE)/ingress-nginx
- --annotations-prefix=nginx.ingress.kubernetes.io
securityContext:
capabilities:
drop:
- ALL
add:
- NET_BIND_SERVICE
# www-data -> 33
runAsUser: 33
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
---
ドリフトは、入口ノードとnode02に固定されています。
[root@master ingress-nginx]# kubectl get no
NAME STATUS ROLES AGE VERSION
master Ready master 9d v1.10.0
node02 Ready <none> 8d v1.10.0
ネットワークアクセスの効率を向上させるために、真:ノードマークlableラベルをnode02でするには、hostNetworkを設定
kubectl label node node02 app=ingress
YAMLファイル構成され、lableラベルも侵入を作成築くようになりました
kubectl apply -f mandatory.yaml
ビューポッドのステータス
[root@master ingress-nginx]# kubectl get pod -n ingress-nginx
NAME READY STATUS RESTARTS AGE
default-http-backend-66c4fbf5b4-vkrzq 1/1 Running 4 21h
nginx-ingress-controller-658cd45944-tqgvm 1/1 Running 1 21h
# default
如果外界访问的域名不存在的话,则默认转发到default-http-backend这个Service,其会直接返回404:
私は、入口・デモ・テストを作成し、最初のTomcatを作成します
---
# deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: tomcat-demo
spec:
selector:
matchLabels:
app: tomcat-demo
replicas: 1
template:
metadata:
labels:
app: tomcat-demo
spec:
containers:
- name: tomcat-demo
image: registry.cn-hangzhou.aliyuncs.com/liuyi01/tomcat:8.0.51-alpine
ports:
- containerPort: 8080
---
# service
apiVersion: v1
kind: Service
metadata:
name: tomcat-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8080
selector:
app: tomcat-demo
---
#ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: tomcat-demo
spec:
rules:
- host: ingress1.com
http:
paths:
- path: /
backend:
serviceName: tomcat-demo
servicePort: 8080
nginxのではサービス・テストを作成します
# deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: tomcat-demo
spec:
selector:
matchLabels:
app: tomcat-demo
replicas: 1
template:
metadata:
labels:
app: tomcat-demo
spec:
containers:
- name: tomcat-demo
image: registry.cn-hangzhou.aliyuncs.com/liuyi01/tomcat:8.0.51-alpine
ports:
- containerPort: 8080
---
# service
apiVersion: v1
kind: Service
metadata:
name: tomcat-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8080
selector:
app: tomcat-demo
---
#ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: tomcat-demo
spec:
rules:
- host: ingress2.com
http:
paths:
- path: /
backend:
serviceName: tomcat-demo
servicePort: 8080
nginxのとTomcatポッドサービスの作成
[root@master nginx-ingress]# kubectl apply -f .
# 查看pod情况,服务都起来了
[root@master nginx-ingress]# kubectl get pod
NAME READY STATUS RESTARTS AGE
load-generator-7bbbb4fdd4-l5vmz 1/1 Running 9 8d
myapp-deploy-6b9c9f847c-d6fsp 1/1 Running 0 2h
mynginx-85f8f5d89c-mhhzc 1/1 Running 0 2h
nginx-demo-6c5d64fd5f-xnscz 1/1 Running 0 1h
testservice-796fbc64bb-bczbs 1/1 Running 8 7d
tomcat-demo-686b48d96c-zxfpt 1/1 Running 0 2h
DNSの設定、我々はhostsファイルを使用して、現在のテスト環境が解析されます
192.168.14.32 ingress1.com
192.168.14.32 ingress2.com
別のドメイン名を訪問する次に、異なるサービスを受けます