[HOPSWORKS-2800] Add utility function to check if a service is ready (#…

…30)

files/default/domain_utils.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+_is_service_ready () {
+    SERVICE=$1
+    DOMAIN_NAME=$2
+    MAX_ATTEMPTS=10
+    if [ $# -eq 3 ]
+    then
+	MAX_ATTEMPTS=$3
+    fi
+    echo "Checking readiness of $SERVICE <$DOMAIN_NAME>"
+    attempt=0
+    while ! host $DOMAIN_NAME
+    do
+        ((attempt+=1))
+        if [ $attempt -gt $MAX_ATTEMPTS ]
+        then
+            ! break
+        fi
+        if systemctl list-units --full -all | grep -Fq $SERVICE
+        then
+            if systemctl is-active --quiet $SERVICE
+            then
+                sleep 5
+            else
+                ! break
+            fi
+        else
+            sleep 5
+        fi;
+    done
+}

recipes/default.rb

@@ -206,4 +206,11 @@
     owner node['consul']['user']
     group node['consul']['group']
     mode 0755
+end
+
+cookbook_file "#{node['consul']['bin_dir']}/domain_utils.sh" do
+    source "domain_utils.sh"
+    owner node['consul']['user']
+    group node['consul']['group']
+    mode '0755'
 end