环境说明
用argo rollouts 金丝雀发布策略更新nginx服务。
发布过程结合Isito和analysis。
创建 ns argo-demo
# kubectl create ns argo-demo
namespace/argo-demo created
启用Istio自动注入功能
# kubectl label namespace argo-demo istio-injection=enabled
namespace/argo-demo labeled
nginx 环境部署
argo-rollouts-nginx-with-analysis.yaml
apiVersion: argoproj.io/v1alpha1
kind: AnalysisTemplate
metadata:
name: success-rate
spec:
args:
- name: service-name
metrics:
- name: success-rate
# NOTE: prometheus queries return results in the form of a vector.
# So it is common to access the index 0 of the returned array to obtain the value
successCondition: result[0] >= 0.95
interval: 20s
count: 3
failureLimit: 3
provider:
prometheus:
address: http://prometheus.istio-system.svc.wgs.local:9090
query: |
sum(irate(
istio_requests_total{reporter="source",destination_service=~"{{args.service-name}}",response_code!~"5.*"}[1m]
)) /
sum(irate(
istio_requests_total{reporter="source",destination_service=~"{{args.service-name}}"}[1m]
))
---
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
name: nginx-rollout-vsvc
spec:
#gateways:
#- istio-rollout-gateway
hosts:
- nginx
http:
- name: primary
route:
- destination:
host: nginx
subset: stable
weight: 100
- destination:
host: nginx
subset: canary
weight: 0
---
apiVersion: networking.istio.io/v1beta1
kind: DestinationRule
metadata:
name: nginx-rollout-destrule
spec:
host: nginx
subsets:
- name: canary
labels:
app: nginx
- name: stable
labels:
app: nginx
---
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
name: rollouts-nginx-with-analysis
annotations:
notifications.argoproj.io/subscribe.on-rollout-completed.email: [email protected]
spec:
replicas: 10
strategy:
canary:
trafficRouting:
istio:
virtualService:
name: nginx-rollout-vsvc
routes:
- primary
destinationRule:
name: nginx-rollout-destrule
canarySubsetName: canary
stableSubsetName: stable
steps:
- setWeight: 5
- pause: {duration: 2m}
- analysis:
templates:
- templateName: success-rate
args:
- name: service-name
value: nginx.argo-demo.svc.wgs.local
- setWeight: 10
- pause: {duration: 1m}
- setWeight: 30
- pause: {duration: 1m}
- setWeight: 60
- pause: {duration: 1m}
revisionHistoryLimit: 5
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.24-alpine
ports:
- name: http
containerPort: 80
protocol: TCP
resources:
requests:
memory: 32Mi
cpu: 50m
livenessProbe:
httpGet:
path: '/'
port: 80
scheme: HTTP
readinessProbe:
httpGet:
path: '/'
port: 80
scheme: HTTP
initialDelaySeconds: 5
---
apiVersion: v1
kind: Service
metadata:
name: nginx
spec:
ports:
- port: 80
targetPort: http
protocol: TCP
name: http
selector:
app: nginx
创建环境
# kubectl apply -f argo-rollouts-nginx-with-analysis.yaml -n argo-demo
analysistemplate.argoproj.io/success-rate created
virtualservice.networking.istio.io/nginx-vsvc created
destinationrule.networking.istio.io/nginx-rollout-destrule created
rollout.argoproj.io/rollouts-nginx-with-analysis created
service/spring-boot-helloworld created
查看部署结果
访问测试
创建客户端
# kubectl apply -f istio/samples/sleep/ -n argo-demo
serviceaccount/notsleep created
service/notsleep created
deployment.apps/notsleep created
serviceaccount/sleep created
service/sleep created
deployment.apps/sleep created
serviceaccount/sleep unchanged
service/sleep unchanged
deployment.apps/sleep configured
登录客户端
# kubectl exec -it sleep-7656cf8794-l4vgv -n argo-demo -- /bin/sh
/ $
访问nginx服务
/ $ while true;do curl nginx -I ; sleep 1;done
HTTP/1.1 200 OK
server: envoy
date: Fri, 15 Dec 2023 09:03:23 GMT
content-type: text/html
content-length: 615
last-modified: Tue, 11 Apr 2023 17:21:57 GMT
etag: "64359735-267"
accept-ranges: bytes
x-envoy-upstream-service-time: 6
更新nginx服务
# kubectl argo rollouts set image rollouts-nginx-with-analysis nginx=nginx:1.25-alpine -n argo-demo
rollout "rollouts-nginx-with-analysis" image updated
查看更新过程
查看流量比例动态调整
# kubectl get vs -n argo-demo -o yaml
apiVersion: v1
items:
- apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"networking.istio.io/v1beta1","kind":"VirtualService","metadata":{"annotations":{},"name":"nginx-rollout-vsvc","namespace":"argo-demo"},"spec":{"hosts":["nginx"],"http":[{"name":"primary","route":[{"destination":{"host":"nginx","subset":"stable"},"weight":100},{"destination":{"host":"nginx","subset":"canary"},"weight":0}]}]}}
creationTimestamp: "2023-12-15T08:37:29Z"
generation: 3
name: nginx-rollout-vsvc
namespace: argo-demo
resourceVersion: "8750553"
uid: 7a4eaf4d-0dfa-49a1-9344-fd71dcb664c2
spec:
hosts:
- nginx
http:
- name: primary
route:
- destination:
host: nginx
subset: stable
weight: 90
- destination:
host: nginx
subset: canary
weight: 10 # 动态调整
kind: List
metadata:
resourceVersion: ""