kubeval tweaks (#36)

* kubeval changes

CHANGELOG.md

@@ -1,3 +1,13 @@
+# Version 5.0.0
+
+Docker Image: quay.io/lifechurch/k8s-deploy-helper:5.0.0
+
+## Feature
+
+* DEPLOY: KDH will determine the Kubernetes version you are deploying against and run kubeval manifests specifically against that version.
+
+* DEPLOY: You can now set KDH_SKIP_KUBEVAL variable to true in order to skip kubeval runs.
+
 # Version 4.0.3
 
 Docker Image: quay.io/lifechurch/k8s-deploy-helper:4.0.3

README.md

@@ -169,6 +169,11 @@ kubernetes
 ## Debugging
 Starting in 3.0, k8s-deploy-helper renders all templates before trying to apply them. All rendered manifests are displayed in the runner for easy debugging. The rendered templates are put in ```/tmp/kubernetes``` if you want to grab them using GitLab artifacts for some reason. In addition, we now use kubeval.
 
+## kubeval
+KDH will try to figure out the version of Kubernetes you are deploying to, and then target kubeval specificaly for that version.
+
+Optionally, you can set the KDH_SKIP_KUBEVAL variable to true in order to skip the use of kubeval.
+
 ## Canary Deploys
 As of 3.0, k8s-deploy-helper will automatically support canary deployments via rewriting your deployment manifests. To use this functionality, you just need to be in a GitLab CI stage named canary, and k8s-deploy-helper will search for manifests where the ```track``` label is set to ```stable```.
 

deploy

@@ -37,6 +37,9 @@ kubectl create secret -n $KUBE_NAMESPACE \
   -o yaml --dry-run | kubectl apply -n $KUBE_NAMESPACE -f -
 echo "Registry secret created"
 
+echo "Getting your Kubernetes version for kubeval purposes"
+kube_version=$(kubectl version --short=true | grep Server | awk '{print $3}' | cut -d'-' -f1 | cut -d'v' -f2)
+
 echo
 export SECRET_KDH_DUMMY="useless"
 echo "Creating secrets from GitLab variables"
@@ -119,15 +122,17 @@ if [ -d "$CI_PROJECT_DIR/kubernetes" ]; then
   echo "Evaluating rendered manifests."
   # Dump the templated manifests to the log for easier debugging and run kubeval against each
   for filename in /tmp/kubernetes/*.yaml; do
-    echo "Checking for non-K8s native manifests"
+    echo "Checking for GKE native manifests"
     if grep -q 'apiVersion: cloud.google.com' $filename; then
-        echo "Found non-native K8s manifest - skipping - $filename"
+        echo "Found GKE K8s manifest - skipping - $filename"
     else
-        echo "Running kubeval against $filename"
         echo
         cat "$filename"
         echo
-        kubeval $filename
+        if [ "x$KDH_SKIP_KUBEVAL" != "xtrue" ]; then
+          echo "Running kubeval against $filename"
+          kubeval -v $kube_version $filename
+        fi       
     fi
   done
   echo "Evaluation finished."