helm.yaml: update ci

- use ubuntu 20.04
- set nf_conntrack_max to avoid CrashLoopBackOff for kube proxy (see
kubernetes-sigs/kind#2240 (comment))
- print cluster info as soon as KinD is up
- use kind-action v1.4.0
- bump KinD to v0.10.0

Signed-off-by: Mattia Mazzucato <matt.mazzucato@gmail.com>

.github/workflows/helm.yaml

@@ -23,7 +23,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v2
     - name: Fetch history
@@ -44,9 +44,14 @@ jobs:
         if [[ -n "$changed" ]]; then
           echo "::set-output name=changed::true"
         fi
-    - uses: container-tools/kind-action@v1
+    - name: Set nf_conntrack_max value
+      # This step is required to avoid CrashLoopBackOff for kube-proxy
+      # see https://github.com/kubernetes-sigs/kind/issues/2240#issuecomment-838510890
+      run: |
+        sudo sysctl net/netfilter/nf_conntrack_max=131072
+    - uses: container-tools/kind-action@v1.4.0
       with:
-        version: "v0.8.1"
+        version: "v0.10.0"
         node_image: "kindest/node:v1.18.2@sha256:7b27a6d0f2517ff88ba444025beae41491b016bc6af573ba467b70c5e8e0d85f"
     - name: Build test image
       run: |
@@ -61,6 +66,9 @@ jobs:
       run: |
         kubectl cluster-info
         kubectl get pods -n kube-system
+    - name: Dump cluster info
+      run: |
+        kubectl cluster-info dump
     - name: Install cert-manager chart as dependency
       run: |
         kubectl create namespace cert-manager