respond to code review

run_locally.sh

@@ -1,38 +1,44 @@
 #!/bin/bash
 
+# unofficial bash strict mode w/o the -e option
+# -e breaks "eval $cmd" in the retry function
 set -uo pipefail
 IFS=$'\n\t'
 
-# timeouts after 3 minutes
-function retry(){
+function retry(){ # timeouts after 1 minutes
     cmd="$1"
     retryMsg="$2"
-    for i in {1..90}; do
+    for i in {1..20}; do
 	eval "$cmd"
 	if [ $? -eq 0 ]; then
-         return 0
+            return 0
         fi
 	echo "$retryMsg"
-        sleep 2
+        sleep 3
     done
 
     return 1
 }
 
-
 echo "==== CLEAN UP PREVIOUS RUN ==== "
 
 status=$(minikube status --format "{{.MinikubeStatus}}")
-if [ "$status" = "Running" ]; then 
+if [ "$status" = "Running" ] || [ "$status" = "Stopped" ]; then
+    echo "Delete the existing local cluster so that we can cleanly apply resources from scratch..."
     minikube delete
 fi
 
 # the kubectl process does the port-forwarding between operator and local ports
-# we restart the process to be able to bind to the same port again (see end of script)
-echo "Kill kubectl process to re-init port-forwarding for minikube"
-kubepid=$(pidof "kubectl")
-if [ $? -eq 0 ]; then
-    kill "$kubepid"
+# we restart the process to bind to the same port again (see end of script)
+if [ -e /tmp/kubectl-port-forward.pid ]; then
+    
+    pid=$(cat /tmp/kubectl-port-forward.pid)
+    # the process will die if a minikube is stopped manually between two invocations of the script
+    if ps --pid "$pid" > /dev/null; then
+	echo "Kill the kubectl process responsible for port forwarding for minikube so that we can re-use the same ports for forwarding later..."
+	kill "$pid"
+    fi
+    rm /tmp/kubectl-port-forward.pid
 fi
 
 
@@ -48,11 +54,11 @@ echo "==== START OPERATOR ==== "
 # the order of files is significant
 for file  in "configmap.yaml" "serviceaccount.yaml" "postgres-operator.yaml"
 do
-   retry "kubectl  create -f manifests/\"$file\"" "attempt to create $file resource" 
+    retry "kubectl  create -f manifests/\"$file\"" "attempt to create $file resource"
 done
 
-msg="Wait for the postgresql custom resource definition to register."
-cmd="kubectl get crd | grep 'postgresqls.acid.zalan.do' &> /dev/null"
+msg="Wait for the postgresql custom resource definition to register..."
+cmd="kubectl get crd | grep --quiet 'postgresqls.acid.zalan.do'"
 retry "$cmd" "$msg "
 
 kubectl create -f manifests/complete-postgres-manifest.yaml
@@ -62,22 +68,18 @@ operatorPort="8080"
 echo "==== FORWARD OPERATOR PORT $operatorPort TO LOCAL PORT $localPort  ===="
 operatorPod=$(kubectl get pod -l name=postgres-operator -o jsonpath={.items..metadata.name})
 # runs in the background to keep current terminal responsive
-# 1> redirects stdout to remove the info message about forwarded ports; the message sometimes garbles the cli prompt
-kubectl port-forward "$operatorPod" "$localPort":"$operatorPort" 1> /dev/null &
-
+# stdout redirect removes the info message about forwarded ports; the message sometimes garbles the cli prompt
+kubectl port-forward "$operatorPod" "$localPort":"$operatorPort" &> /dev/null &
+pgrep --newest "kubectl" > /tmp/kubectl-port-forward.pid
 
 echo "==== RUN HEALTH CHECK ==== "
-checkCmd="curl -L http://127.0.0.1:$localPort/clusters &> /dev/null"
+checkCmd="curl --location --silent http://127.0.0.1:$localPort/clusters &> /dev/null"
+echo "Command for checking: $checkCmd"
 checkMsg="Wait for port forwarding to take effect"
-retry "$checkCmd"  "$checkMsg"
 
-if [ $? -eq 0 ]; then
+if  retry "$checkCmd" "$checkMsg" ; then
     echo "==== SUCCESS: OPERATOR IS RUNNING ==== "
 else
-    echo "Operator did not start or port forwarding did not work"
+    echo "==== FAILURE: OPERATOR DID NOT START OR PORT FORWARDING DID NOT WORK"
     exit 1
 fi
-
-
-
-