argo rollout istio 实验
argo rollout istio 实验
准备环境
apiVersion: apps/v1
kind: Deployment
metadata:
name: rollouts-demo
spec:
replicas: 1
selector:
matchLabels:
app: rollouts-demo
template:
metadata:
labels:
app: rollouts-demo
istio-injection: enabled
spec:
containers:
- name: rollouts-demo
image: argoproj/rollouts-demo:blue
ports:
- name: http
containerPort: 8080
protocol: TCP
resources:
requests:
memory: 32Mi
cpu: 5m
---
apiVersion: v1
kind: Service
metadata:
name: rollouts-demo-canary
spec:
ports:
- port: 80
targetPort: http
protocol: TCP
name: http
selector:
app: rollouts-demo
# This selector will be updated with the pod-template-hash of the canary ReplicaSet. e.g.:
# rollouts-pod-template-hash: 7bf84f9696
---
apiVersion: v1
kind: Service
metadata:
name: rollouts-demo
spec:
ports:
- port: 80
targetPort: http
protocol: TCP
name: http
selector:
app: rollouts-demo
# This selector will be updated with the pod-template-hash of the stable ReplicaSet. e.g.:
# rollouts-pod-template-hash: 789746c88d
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: rollouts-demo
spec:
gateways:
- rollouts-demo-gateway
hosts:
- rollouts-demo.local
http:
- name: primary
route:
- destination:
host: rollouts-demo
weight: 100
- destination:
host: rollouts-demo-canary
weight: 0
kubectl -n test create -f docs/getting-started/istio/services.yaml
kubectl -n test create -f docs/getting-started/istio/deployments.yaml
kubectl -n test create -f docs/getting-started/istio/virtualsvc.yaml
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-7d6b9bd96b-bx58z 2/2 Running 0 39s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-7d6b9bd96b 1 1 1 39s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 39s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 32s app=rollouts-demo
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 35s app=rollouts-demo
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 25s
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
创建 rollout
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
name: rollouts-demo
spec:
replicas: 1
strategy:
canary:
canaryService: rollouts-demo-canary
stableService: rollouts-demo
trafficRouting:
istio:
virtualService:
name: rollouts-demo
routes:
- primary # At least one route is required
steps:
- setWeight: 5
- pause: { duration: 30s }
- setWeight: 20
- pause: { duration: 30s }
- setWeight: 80
- pause: { duration: 30s }
- setWeight: 100
workloadRef: # Reference an existing Deployment using workloadRef field
apiVersion: apps/v1
kind: Deployment
name: rollouts-demo
kubectl -n test create -f docs/getting-started/istio/rollout.yaml
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-5db7d7f9f7-lgp98 2/2 Running 0 36s
rollouts-demo-7d6b9bd96b-bx58z 2/2 Running 0 117s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 1 1 1 36s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-7d6b9bd96b 1 1 1 117s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 117s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 110s app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 113s app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 103s
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
Normal RolloutUpdated 4m43s rollouts-controller Rollout updated to revision 1
Normal NewReplicaSetCreated 4m43s rollouts-controller Created ReplicaSet rollouts-demo-5db7d7f9f7 (revision 1)
Normal ScalingReplicaSet 4m43s rollouts-controller Scaled up ReplicaSet rollouts-demo-5db7d7f9f7 (revision 1) from 0 to 1
Normal RolloutCompleted 4m43s rollouts-controller Rollout completed update to revision 1 (5db7d7f9f7): Initial deploy
Normal SwitchService 4m43s rollouts-controller Switched selector for service 'rollouts-demo' from '' to '5db7d7f9f7'
Normal SwitchService 4m15s rollouts-controller Switched selector for service 'rollouts-demo-canary' from '' to '5db7d7f9f7'
触发更新
kubectl -n test set image deployment rollouts-demo rollouts-demo=argoproj/rollouts-demo:yellow
Normal RolloutUpdated 12s rollouts-controller Rollout updated to revision 2
Normal NewReplicaSetCreated 12s rollouts-controller Created ReplicaSet rollouts-demo-6db9944f45 (revision 2)
Normal ScalingReplicaSet 12s rollouts-controller Scaled up ReplicaSet rollouts-demo-6db9944f45 (revision 2) from 0 to 1
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-5db7d7f9f7-lgp98 2/2 Running 0 8m19s
rollouts-demo-6db9944f45-thtrj 2/2 Running 0 32s
rollouts-demo-7d6b9bd96b-bx58z 0/2 Terminating 0 9m40s
rollouts-demo-84bb999df4-5tbfq 2/2 Running 0 32s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 1 1 1 8m20s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 1 1 1 33s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-7d6b9bd96b 0 0 0 9m41s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-84bb999df4 1 1 1 33s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 9m41s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 9m34s app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 9m37s app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 9m27s
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
Normal RolloutUpdated 84s rollouts-controller Rollout updated to revision 2
Normal NewReplicaSetCreated 84s rollouts-controller Created ReplicaSet rollouts-demo-6db9944f45 (revision 2)
Normal ScalingReplicaSet 84s rollouts-controller Scaled up ReplicaSet rollouts-demo-6db9944f45 (revision 2) from 0 to 1
Normal SwitchService 55s rollouts-controller Switched selector for service 'rollouts-demo-canary' from '5db7d7f9f7' to '6db9944f45'
Normal UpdatedVirtualService 49s rollouts-controller VirtualService `rollouts-demo` set to desiredWeight '5'
Normal RolloutStepCompleted 49s rollouts-controller Rollout step 1/2 completed (setWeight: 5)
Normal RolloutPaused 49s rollouts-controller Rollout is paused (CanaryPauseStep)
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-5db7d7f9f7-lgp98 2/2 Running 0 8m47s
rollouts-demo-6db9944f45-thtrj 2/2 Running 0 60s
rollouts-demo-84bb999df4-5tbfq 2/2 Running 0 60s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 1 1 1 8m48s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 1 1 1 61s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-7d6b9bd96b 0 0 0 10m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-84bb999df4 1 1 1 61s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 10m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 10m app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 10m app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 9m55s
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 95
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 5
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
Normal UpdatedVirtualService 4s rollouts-controller VirtualService `rollouts-demo` set to desiredWeight '20'
Normal RolloutStepCompleted 4s rollouts-controller Rollout step 3/7 completed (setWeight: 20)
...
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 80
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 20
}
]
}
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 20
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 80
}
]
}
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-5db7d7f9f7-lgp98 2/2 Running 0 30m
rollouts-demo-6db9944f45-thtrj 2/2 Running 0 22m
rollouts-demo-84bb999df4-5tbfq 2/2 Running 0 22m
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 1 1 1 30m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 1 1 1 22m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-7d6b9bd96b 0 0 0 31m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-84bb999df4 1 1 1 22m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 31m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 31m app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 31m app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 31m
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
Normal RolloutStepCompleted 2m9s rollouts-controller Rollout step 7/7 completed (setWeight: 100)
Normal ScalingReplicaSet 99s rollouts-controller Scaled down ReplicaSet rollouts-demo-5db7d7f9f7 (revision 1) from 1 to 0
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 0 0 0 32m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 1 1 1 24m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-7d6b9bd96b 0 0 0 33m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-84bb999df4 1 1 1 24m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
再次触发更新
kubectl -n test set image deployment rollouts-demo rollouts-demo=argoproj/rollouts-demo:red
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-6db9944f45-mvvrn 2/2 Running 0 5m22s
rollouts-demo-7fd6cdb9f8-x66cs 1/2 Running 0 19s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 0 0 0 6m13s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 1 1 1 5m22s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-6fbb665b49 0 0 0 19s rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo,pod-template-hash=6fbb665b49
rollouts-demo-7d6b9bd96b 0 0 0 3d rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-7fd6cdb9f8 1 1 0 19s rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo,rollouts-pod-template-hash=7fd6cdb9f8
rollouts-demo-84bb999df4 0 0 0 5m22s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 0/0 0 0 3d rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 3d app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 3d app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 3d
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 95
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 5
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
更新完成后
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-7fd6cdb9f8-x66cs 2/2 Running 0 2m44s
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-5db7d7f9f7 0 0 0 8m38s rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,rollouts-pod-template-hash=5db7d7f9f7
rollouts-demo-6db9944f45 0 0 0 7m47s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,rollouts-pod-template-hash=6db9944f45
rollouts-demo-6fbb665b49 0 0 0 2m44s rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo,pod-template-hash=6fbb665b49
rollouts-demo-7d6b9bd96b 0 0 0 3d rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-7fd6cdb9f8 1 1 1 2m44s rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo,rollouts-pod-template-hash=7fd6cdb9f8
rollouts-demo-84bb999df4 0 0 0 7m47s rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 0/0 0 0 3d rollouts-demo argoproj/rollouts-demo:red app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 3d app=rollouts-demo,rollouts-pod-template-hash=7fd6cdb9f8
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 3d app=rollouts-demo,rollouts-pod-template-hash=7fd6cdb9f8
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 3d
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
删除 rollout
kubectl -n test delete rollouts.argoproj.io rollouts-demo
+ kubectl -n test get po
NAME READY STATUS RESTARTS AGE
rollouts-demo-6db9944f45-thtrj 2/2 Terminating 0 27m
rollouts-demo-84bb999df4-5tbfq 2/2 Running 0 27m
+ kubectl -n test get -owide replicasets.apps
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rollouts-demo-7d6b9bd96b 0 0 0 36m rollouts-demo argoproj/rollouts-demo:blue app=rollouts-demo,pod-template-hash=7d6b9bd96b
rollouts-demo-84bb999df4 1 1 1 27m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo,pod-template-hash=84bb999df4
+ kubectl -n test get -owide deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
rollouts-demo 1/1 1 1 36m rollouts-demo argoproj/rollouts-demo:yellow app=rollouts-demo
+ kubectl -n test get -owide svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
rollouts-demo ClusterIP 10.100.190.127 <none> 80/TCP 36m app=rollouts-demo
rollouts-demo-canary ClusterIP 10.111.4.13 <none> 80/TCP 36m app=rollouts-demo
+ kubectl -n test get -owide virtualservices.networking.istio.io
NAME GATEWAYS HOSTS AGE
rollouts-demo [rollouts-demo-gateway] [rollouts-demo.local] 36m
+ kubectl -n test get virtualservices.networking.istio.io rollouts-demo -ojson
+ jq .spec.http[0]
{
"name": "primary",
"route": [
{
"destination": {
"host": "rollouts-demo"
},
"weight": 100
},
{
"destination": {
"host": "rollouts-demo-canary"
},
"weight": 0
}
]
}
+ kubectl -n test get -owide destinationrules.networking.istio.io
No resources found in test namespace.
总结
- 创建 rollout 后
- 将创建与当前 deployment 相同的 rs
- 并将当前 service 以及 canary service 流量全部切换（修改 service label）至 rs。
此时的原 deployment 所有副本均不接受流量了。
- 触发更新（更改原 deployment spec）
- 将创建新版本 rs v2
- 将 canary service 流量切换至 rs v2。(更改 service label)
- 逐步增加流向 canary service 的流量。（更改 virtualservice）
- 流量全部切换至 canary service 后(100%)
在 argo rollout 的过程中，原来的 deployment 也在进行版本切换，但只是没有实际承载流量。
- 完成更新
- 将原 service 指向新版本 rs(pod),此时 virtual service 中其流量比例为 0。(更改 service label)
- 将 service 流量比例调至 100%，canary service 降低至 0
- 删除 rollout
- 恢复原 service label，将流量指向原来的 deployment pods。
- 删除 rs v2
由于恢复了 service label，流量得以指向了与 argo 同时更新的新版本 deployment 的 pod，所以不会中断