Merge pull request #521 from rabbitmq/pr-1.19

Include k8s 1.20 in PR system tests

Author: ChunyiLyu

.github/workflows/pr.yml

@@ -33,7 +33,7 @@ jobs:
         export GOPATH=$HOME/go
         export PATH=$PATH:$GOPATH/bin
         make install-tools
-        kind create cluster --image kindest/node:v1.19.1
+        kind create cluster --image kindest/node:v1.20.0
         kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/latest/download/cert-manager.crds.yaml
         # Create CRD PodMonitor without running Prometheus operator
         curl https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/master/bundle.yaml | sed "s/replicas: 1$/replicas: 0/" | kubectl apply -f -
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        k8s: [v1.17.11, v1.18.8, v1.19.1]
+        k8s: [v1.17.11, v1.18.8, v1.19.4, v1.20.0]
     steps:
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
@@ -75,7 +75,7 @@ jobs:
       uses: actions/checkout@v2
     - name: kubectl rabbitmq tests
       env:
-        K8S_VERSION: v1.19.1
+        K8S_VERSION: v1.20.0
       run: |
         export GOPATH=$HOME/go
         export PATH=$PATH:$GOPATH/bin