Merge pull request #36596 from Intimaria/patch-1

use $HOSTNAME env variable instead of hostname command in new Oracle based mysql container

Author: k8s-ci-robot

content/en/examples/application/mysql/mysql-statefulset.yaml

@@ -24,7 +24,7 @@ spec:
         - |
           set -ex
           # Generate mysql server-id from pod ordinal index.
-          [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
+          [[ $HOSTNAME =~ -([0-9]+)$ ]] || exit 1
           ordinal=${BASH_REMATCH[1]}
           echo [mysqld] > /mnt/conf.d/server-id.cnf
           # Add an offset to avoid reserved server-id=0 value.