Add facility to configure log levels in kubernetes-etcd

Change-Id: Iefaa48b9eb3403cf6955374d5ea460f676e0806b

charts/etcd/templates/etc/_kubernetes-etcd.yaml.tpl

@@ -69,6 +69,8 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: status.podIP
+        - name: ETCD_LOG_PACKAGE_LEVELS
+          value: {{ default "" .Values.etcd.logging.log_level | include "helm-toolkit.utils.joinListWithComma" }}
         - name: ETCD_CLIENT_CERT_AUTH
           value: "true"
         - name: ETCD_PEER_CLIENT_CERT_AUTH

charts/etcd/values.yaml

@@ -41,7 +41,12 @@ etcd:
   host_etc_path: /etc/etcd-example
   host_data_path: /var/lib/etcd/example
   cleanup_data: true
-
+  logging:
+    # Set individual etcd subpackages to specific log levels.
+    # An example being etcdserver=WARNING,security=DEBUG
+    log_level:
+      - etcdserver=DEBUG
+      - security=DEBUG
 backup:
   host_backup_path: /var/backups/etcd
   backup_log_file: /var/log/etcd-backup.log