步驟一:確認兩個叢集的互訪聯通性
預設情況下,同一個VPC下的兩個叢集,如果使用了企業安全性群組,預設能夠互相訪問。如果使用普通安全性群組或者兩個安全性群組訪問不通,則需要為彼此添加安全性群組訪問規則。具體操作,請參見添加安全性群組規則。
步驟二:添加叢集到ASM執行個體並建立Serverless入口網關
將兩個叢集添加到ASM執行個體後,建立一個Serverless入口網關。
將兩個叢集添加到ASM執行個體。具體操作,請參見添加叢集到ASM執行個體。
使用以下YAML,建立一個Serverless入口網關。具體操作,請參見建立入口網關服務。
展開查看Serverless入口網關YAML
apiVersion: istio.alibabacloud.com/v1beta1
kind: IstioGateway
metadata:
annotations:
asm.alibabacloud.com/managed-by-asm: 'true'
name: ingressgateway
namespace: istio-system
spec:
gatewayType: ingress
dnsPolicy: ClusterFirst
externalTrafficPolicy: Local
hostNetwork: false
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
- name: https
port: 443
protocol: TCP
targetPort: 443
replicaCount: 1
resources:
limits:
cpu: '2'
memory: 2G
requests:
cpu: 200m
memory: 256Mi
rollingMaxSurge: 100%
rollingMaxUnavailable: 25%
runAsRoot: true
serviceType: LoadBalancer
步驟三:部署Bookinfo應用
為了示範ASM跨叢集的應用部署能力,Bookinfo應用的不同微服務分別部署在兩個叢集上。
使用以下內容,在m1c2叢集中建立bookinfo-m1c2.yaml。
說明 review-v3 deployment對應的功能是書評中顯示紅色星。
展開查看Bookinfo應用YAML
# Details service
apiVersion: v1
kind: Service
metadata:
name: details
labels:
app: details
service: details
spec:
ports:
- port: 9080
name: http
selector:
app: details
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: bookinfo-details
labels:
account: details
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: details-v1
labels:
app: details
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: details
version: v1
template:
metadata:
labels:
app: details
version: v1
spec:
serviceAccountName: bookinfo-details
containers:
- name: details
image: docker.io/istio/examples-bookinfo-details-v1:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
# Ratings service
apiVersion: v1
kind: Service
metadata:
name: ratings
labels:
app: ratings
service: ratings
spec:
ports:
- port: 9080
name: http
selector:
app: ratings
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: bookinfo-ratings
labels:
account: ratings
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: ratings-v1
labels:
app: ratings
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: ratings
version: v1
template:
metadata:
labels:
app: ratings
version: v1
spec:
serviceAccountName: bookinfo-ratings
containers:
- name: ratings
image: docker.io/istio/examples-bookinfo-ratings-v1:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
# Reviews service
apiVersion: v1
kind: Service
metadata:
name: reviews
labels:
app: reviews
service: reviews
spec:
ports:
- port: 9080
name: http
selector:
app: reviews
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: bookinfo-reviews
labels:
account: reviews
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: reviews-v1
labels:
app: reviews
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: reviews
version: v1
template:
metadata:
labels:
app: reviews
version: v1
spec:
serviceAccountName: bookinfo-reviews
containers:
- name: reviews
image: docker.io/istio/examples-bookinfo-reviews-v1:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: reviews-v2
labels:
app: reviews
version: v2
spec:
replicas: 1
selector:
matchLabels:
app: reviews
version: v2
template:
metadata:
labels:
app: reviews
version: v2
spec:
serviceAccountName: bookinfo-reviews
containers:
- name: reviews
image: docker.io/istio/examples-bookinfo-reviews-v2:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
# Productpage services
apiVersion: v1
kind: Service
metadata:
name: productpage
labels:
app: productpage
service: productpage
spec:
ports:
- port: 9080
name: http
selector:
app: productpage
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: bookinfo-productpage
labels:
account: productpage
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: productpage-v1
labels:
app: productpage
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: productpage
version: v1
template:
metadata:
labels:
app: productpage
version: v1
spec:
serviceAccountName: bookinfo-productpage
containers:
- name: productpage
image: docker.io/istio/examples-bookinfo-productpage-v1:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
執行以下命令,在m1c2叢集中部署不包含review-v3 deployment的Bookinfo應用。
kubectl apply -f bookinfo-m1c2.yaml
使用以下內容,在m1c1叢集中建立bookinfo-m1c1.yaml。
展開查看YAML內容
# Reviews service
apiVersion: v1
kind: Service
metadata:
name: reviews
labels:
app: reviews
service: reviews
spec:
ports:
- port: 9080
name: http
selector:
app: reviews
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: bookinfo-reviews
labels:
account: reviews
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: reviews-v3
labels:
app: reviews
version: v3
spec:
replicas: 1
selector:
matchLabels:
app: reviews
version: v3
template:
metadata:
labels:
app: reviews
version: v3
spec:
serviceAccountName: bookinfo-reviews
containers:
- name: reviews
image: docker.io/istio/examples-bookinfo-reviews-v3:1.15.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9080
---
# Ratings service
apiVersion: v1
kind: Service
metadata:
name: ratings
labels:
app: ratings
service: ratings
spec:
ports:
- port: 9080
name: http
selector:
app: ratings
執行以下命令,在m1c1叢集中部署review-v3和ratting service。
kubectl apply -f bookinfo-m1c1.yaml
步驟四:添加虛擬服務和網關規則
在ASM執行個體的default命名空間下,建立一個名為bookinfo的虛擬服務。具體操作,請參見管理虛擬服務。
展開查看虛擬服務YAML
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: bookinfo
spec:
hosts:
- "*"
gateways:
- bookinfo-gateway
http:
- match:
- uri:
exact: /productpage
- uri:
prefix: /static
- uri:
exact: /login
- uri:
exact: /logout
- uri:
prefix: /api/v1/products
route:
- destination:
host: productpage
port:
number: 9080
在ASM執行個體的default命名空間下,建立一個名為bookinfo-gateway的網關規則。具體操作,請參見管理網關規則。
展開查看網關規則YAML
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: bookinfo-gateway
spec:
selector:
istio: ingressgateway # use istio default controller
servers:
- port:
number: 80
name: http
protocol: HTTP
hosts:
- "*"
在瀏覽器地址欄,輸入http://{Serverless入口網關的IP地址}/productpage
,並多次重新整理頁面。
可以看到頁面出現reviews的3個版本,且比例接近1:1:1。雖然review-v3和其他服務不在同一個叢集中,也可以正常顯示。
(可選)步驟五:指定reviews總是使用v3版本
通過定義目標規則和虛擬服務,可以定義Bookinfo應用的微服務部署策略。本例中將指定Bookinfo總是使用review v3版本。
在ASM執行個體的default命名空間下,建立一個名為reviews的目標規則。具體操作,請參見管理虛擬服務。
展開查看目標規則YAML
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: reviews
spec:
host: reviews
subsets:
- name: v1
labels:
version: v1
- name: v2
labels:
version: v2
- name: v3
labels:
version: v3
在ASM執行個體的default命名空間下,建立一個名為reviews的虛擬服務。具體操作,請參見管理虛擬服務。
展開查看虛擬服務YAML
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
spec:
hosts:
- reviews
http:
- route:
- destination:
host: reviews
subset: v3
在瀏覽器地址欄,輸入http://{Serverless入口網關的IP地址}/productpage
,並多次重新整理頁面。
可以看到reviews始終使用v3版本,即書評中為紅色星。