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feat: new example: subset-level traffic splitting (idan-codefresh#14)
Signed-off-by: Hui Kang <[email protected]>
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‎README.md

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@@ -16,6 +16,8 @@ The following examples are provided:
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| [Canary Analysis](examples/analysis) | Rollout which performs canary analysis as part of the update. Uses the prometheus metric provider. |
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| [Experiment](examples/experiment) | Experiment which performs an A/B test. Performs analysis against the A and B using the job metric provider |
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| [Preview Stack Testing](examples/preview-testing) | Rollout which launches an experiment that tests a preview stack (which receives no production traffic) |
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| [Canary with istio (1)](examples/istio) | Rollout which uses host-level traffic splitting during update |
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| [Canary with istio (2)](examples/istio-subset) | Rollout which uses subset-level traffic splitting during update |
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Before running an example:
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‎examples/istio-subset/analysis.yaml

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apiVersion: argoproj.io/v1alpha1
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kind: AnalysisTemplate
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metadata:
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name: istio-success-rate
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spec:
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# this analysis template requires a service name and namespace to be supplied to the query
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args:
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- name: service
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- name: namespace
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metrics:
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- name: success-rate
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initialDelay: 60s
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interval: 20s
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successCondition: result[0] > 0.90
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provider:
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prometheus:
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address: http://prometheus.istio-system:9090
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query: >+
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sum(irate(istio_requests_total{
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reporter="source",
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destination_service=~"{{args.service}}.{{args.namespace}}.svc.cluster.local",
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response_code!~"5.*"}[40s])
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)
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/
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sum(irate(istio_requests_total{
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reporter="source",
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destination_service=~"{{args.service}}.{{args.namespace}}.svc.cluster.local"}[40s])
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)

‎examples/istio-subset/destinationrule.yaml

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apiVersion: networking.istio.io/v1alpha3
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kind: DestinationRule
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metadata:
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name: rollout-destrule
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spec:
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host: istio-rollout
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subsets:
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- name: canary # referenced in canary.trafficRouting.istio.destinationRule.canarySubsetName
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labels: # labels will be injected with canary rollouts-pod-template-hash value
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app: istio-rollout
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- name: stable # referenced in canary.trafficRouting.istio.destinationRule.stableSubsetName
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labels: # labels will be injected with canary rollouts-pod-template-hash value
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app: istio-rollout

‎examples/istio-subset/gateway.yaml

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apiVersion: networking.istio.io/v1alpha3
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kind: Gateway
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metadata:
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name: istio-rollout-gateway
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spec:
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selector:
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istio: ingressgateway
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servers:
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- port:
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number: 80
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name: http
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protocol: HTTP
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hosts:
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- "*"

‎examples/istio-subset/kustomization.yaml

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apiVersion: kustomize.config.k8s.io/v1beta1
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kind: Kustomization
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resources:
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- namespace.yaml
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- analysis.yaml
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- gateway.yaml
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- services.yaml
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- virtualservice.yaml
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- rollout.yaml
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- destinationrule.yaml
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namespace: rollouts-demo-istio

‎examples/istio-subset/namespace.yaml

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apiVersion: v1
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kind: Namespace
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metadata:
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labels:
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istio-injection: enabled
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name: rollouts-demo-istio

‎examples/istio-subset/rollout.yaml

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apiVersion: argoproj.io/v1alpha1
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kind: Rollout
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metadata:
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name: istio-rollout
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spec:
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revisionHistoryLimit: 2
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selector:
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matchLabels:
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app: istio-rollout
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template:
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metadata:
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annotations:
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sidecar.istio.io/inject: "true"
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labels:
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app: istio-rollout
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spec:
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containers:
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- name: istio-rollout
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image: argoproj/rollouts-demo:blue
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ports:
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- name: http
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containerPort: 8080
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protocol: TCP
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resources:
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requests:
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memory: 32Mi
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cpu: 5m
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strategy:
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canary:
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analysis will be performed in background, while rollout is progressing through its steps
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analysis:
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startingStep: 1 # index of step list, of when to start this analysis
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templates:
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- templateName: istio-success-rate
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args: # arguments allow AnalysisTemplates to be re-used
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- name: service
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value: canary
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- name: namespace
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valueFrom:
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fieldRef:
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fieldPath: metadata.namespace
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trafficRouting:
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istio:
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virtualService:
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name: istio-rollout-vsvc
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routes:
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- primary
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destinationRule:
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name: rollout-destrule # required
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canarySubsetName: canary # required
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stableSubsetName: stable # required
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steps:
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- setWeight: 10
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- pause: {} # pause indefinitely
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- setWeight: 20
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- pause: {duration: 20s}
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- setWeight: 30
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- pause: {duration: 20s}
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- setWeight: 40
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- pause: {duration: 20s}
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- setWeight: 50
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- pause: {duration: 20s}
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- setWeight: 60
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- pause: {duration: 20s}
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- setWeight: 70
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- pause: {duration: 20s}
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- setWeight: 80
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- pause: {duration: 20s}
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- setWeight: 90
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- pause: {duration: 20s}

‎examples/istio-subset/services.yaml

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apiVersion: v1
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kind: Service
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metadata:
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name: istio-rollout
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spec:
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ports:
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- port: 80
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targetPort: http
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protocol: TCP
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name: http
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selector:
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app: istio-rollout

‎examples/istio-subset/virtualservice.yaml

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apiVersion: networking.istio.io/v1alpha3
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kind: VirtualService
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metadata:
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name: istio-rollout-vsvc
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spec:
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gateways:
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- istio-rollout-gateway
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hosts:
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- istio-rollout.apps.argoproj.io
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- istio-rollout.local
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http:
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- name: primary
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route:
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- destination:
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host: istio-rollout
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subset: stable # referenced in canary.trafficRouting.istio.destinationRule.stableSubsetName
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weight: 100
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- destination:
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host: istio-rollout
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subset: canary # referenced in canary.trafficRouting.istio.destinationRule.canarySubsetName
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weight: 0

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