Remove awk dependency in auto-setup.sh (#2068)

* Remove awk dependency in auto-setup.sh

* Remove read dependency in auto-setup.sh

* Fix spacing

docker/auto-setup.sh

@@ -98,20 +98,18 @@ wait_for_cassandra() {
 }
 
 wait_for_mysql() {
-    SERVER=$(echo "${MYSQL_SEEDS}" | awk -F ',' '{print $1}')
-    until nc -z "${SERVER}" "${DB_PORT}"; do
+    until nc -z "${MYSQL_SEEDS%%,*}" "${DB_PORT}"; do
         echo 'Waiting for MySQL to start up.'
-      sleep 1
+        sleep 1
     done
 
     echo 'MySQL started.'
 }
 
 wait_for_postgres() {
-    SERVER=$(echo "${POSTGRES_SEEDS}" | awk -F ',' '{print $1}')
-    until nc -z "${SERVER}" "${DB_PORT}"; do
-      echo 'Waiting for PostgreSQL to startup.'
-      sleep 1
+    until nc -z "${POSTGRES_SEEDS%%,*}" "${DB_PORT}"; do
+        echo 'Waiting for PostgreSQL to startup.'
+        sleep 1
     done
 
     echo 'PostgreSQL started.'
@@ -218,10 +216,9 @@ validate_es_env() {
 wait_for_es() {
     SECONDS=0
 
-    ES_SERVER=$(echo "${ES_SEEDS}" | awk -F ',' '{print $1}')
-    URL="${ES_SCHEME}://${ES_SERVER}:${ES_PORT}"
+    ES_SERVER="${ES_SCHEME}://${ES_SEEDS%%,*}:${ES_PORT}"
 
-    until curl --silent --fail --user "${ES_USER}":"${ES_PWD}" "${URL}" > /dev/null 2>&1; do
+    until curl --silent --fail --user "${ES_USER}":"${ES_PWD}" "${ES_SERVER}" > /dev/null 2>&1; do
         DURATION=${SECONDS}
 
         if [ "${ES_SCHEMA_SETUP_TIMEOUT_IN_SECONDS}" -gt 0 ] && [ ${DURATION} -ge "${ES_SCHEMA_SETUP_TIMEOUT_IN_SECONDS}" ]; then
@@ -237,8 +234,7 @@ wait_for_es() {
 }
 
 setup_es_index() {
-    IFS=',' read -ra ES_SERVERS <<< "${ES_SEEDS}"
-    ES_SERVER="${ES_SCHEME}://${ES_SERVERS[0]}:${ES_PORT}"
+    ES_SERVER="${ES_SCHEME}://${ES_SEEDS%%,*}:${ES_PORT}"
 # @@@SNIPSTART setup-es-template-commands
     # ES_SERVER is the URL of Elasticsearch server i.e. "http://localhost:9200".
     SETTINGS_URL="${ES_SERVER}/_cluster/settings"