Add YTT template value for setting log level

This is helpful for us, amongst other users, because we want to enable "debug"
logging whenever we deploy components for testing.

See a5643e3 for addition of log level.

Signed-off-by: Andrew Keesler <akeesler@vmware.com>

deploy/concierge/deployment.yaml

@@ -3,7 +3,7 @@
 
 #@ load("@ytt:data", "data")
 #@ load("@ytt:json", "json")
-#@ load("helpers.lib.yaml", "defaultLabel", "labels", "namespace", "defaultResourceName", "defaultResourceNameWithSuffix")
+#@ load("helpers.lib.yaml", "defaultLabel", "labels", "namespace", "defaultResourceName", "defaultResourceNameWithSuffix", "getAndValidateLogLevel")
 
 #@ if not data.values.into_namespace:
 ---
@@ -57,6 +57,9 @@ data:
       imagePullSecrets:
         - image-pull-secret
       (@ end @)
+    (@ if data.values.log_level: @)
+    logLevel: (@= getAndValidateLogLevel() @)
+    (@ end @)
 ---
 #@ if data.values.image_pull_dockerconfigjson and data.values.image_pull_dockerconfigjson != "":
 apiVersion: v1

deploy/concierge/helpers.lib.yaml

@@ -28,3 +28,11 @@ app: #@ data.values.app_name
 _: #@ template.replace(defaultLabel())
 _: #@ template.replace(data.values.custom_labels)
 #@ end
+
+#@ def getAndValidateLogLevel():
+#@   log_level = data.values.log_level
+#@   if log_level != "info" and log_level != "debug" and log_level != "trace" and log_level != "all":
+#@     fail("log_level '" + log_level + "' is invalid")
+#@   end
+#@   return log_level
+#@ end

deploy/concierge/values.yaml

@@ -50,3 +50,7 @@ discovery_url: #! e.g., https://example.com
 #! about every 25 days.
 api_serving_certificate_duration_seconds: 2592000
 api_serving_certificate_renew_before_seconds: 2160000
+
+#! Specify the verbosity of logging: info ("nice to know" information), debug (developer
+#! information), trace (timing information), all (kitchen sink).
+log_level: #! By default, when this value is left unset, only warnings and errors are printed. There is no way to suppress warning and error logs.

deploy/supervisor/deployment.yaml

@@ -3,7 +3,7 @@
 
 #@ load("@ytt:data", "data")
 #@ load("@ytt:json", "json")
-#@ load("helpers.lib.yaml", "defaultLabel", "labels", "namespace", "defaultResourceName", "defaultResourceNameWithSuffix")
+#@ load("helpers.lib.yaml", "defaultLabel", "labels", "namespace", "defaultResourceName", "defaultResourceNameWithSuffix", "getAndValidateLogLevel")
 
 #@ if not data.values.into_namespace:
 ---
@@ -33,6 +33,9 @@ data:
     names:
       defaultTLSCertificateSecret: (@= defaultResourceNameWithSuffix("default-tls-certificate") @)
     labels: (@= json.encode(labels()).rstrip() @)
+    (@ if data.values.log_level: @)
+    logLevel: (@= getAndValidateLogLevel() @)
+    (@ end @)
 ---
 #@ if data.values.image_pull_dockerconfigjson and data.values.image_pull_dockerconfigjson != "":
 apiVersion: v1

deploy/supervisor/helpers.lib.yaml

@@ -28,3 +28,11 @@ app: #@ data.values.app_name
 _: #@ template.replace(defaultLabel())
 _: #@ template.replace(data.values.custom_labels)
 #@ end
+
+#@ def getAndValidateLogLevel():
+#@   log_level = data.values.log_level
+#@   if log_level != "info" and log_level != "debug" and log_level != "trace" and log_level != "all":
+#@     fail("log_level '" + log_level + "' is invalid")
+#@   end
+#@   return log_level
+#@ end

deploy/supervisor/values.yaml

@@ -52,3 +52,7 @@ service_https_clusterip_port: #! when specified, creates a ClusterIP Service wit
 #! Ignored unless service_http_loadbalancer_port and/or service_https_loadbalancer_port are provided.
 #! Optional.
 service_loadbalancer_ip: #! e.g. 1.2.3.4
+
+#! Specify the verbosity of logging: info ("nice to know" information), debug (developer
+#! information), trace (timing information), all (kitchen sink).
+log_level: #! By default, when this value is left unset, only warnings and errors are printed. There is no way to suppress warning and error logs.