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Restrict operator to single watched namespace via env var

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This commit is contained in:
Sergey Dudoladov
2018-02-07 16:44:49 +01:00
parent f194a2ae5a
commit 74fa7b9492
5 changed files with 30 additions and 14 deletions
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pkg/controller/controller.go
+25 -9
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@@ -97,18 +97,34 @@ func (c *Controller) initOperatorConfig() {
c.logger.Infoln("no ConfigMap specified. Loading default values")
}
// env var takes priority over the same param from the operator ConfigMap
watchedNamespace := os.Getenv("WATCHED_NAMESPACE")
if watchedNamespace != "" {
c.logger.Infof("Watch the %q namespace specified in the env variable WATCHED_NAMESPACE\n", watchedNamespace)
configMapData["watched_namespace"] = watchedNamespace
// by default, the operator listens to all namespaces
// by setting the env variable, one can restrict the operator to a single namespace
watchedNamespace, isPresentInEnv := os.LookupEnv("WATCHED_NAMESPACE")
if isPresentInEnv {
// special case: v1.NamespaceAll currently also evaluates to the empty string
// so when the env var is set to the empty string, use the default ns
// since the meaning of this env var is only one namespace
if watchedNamespace == "" {
c.logger.Infof("The WATCHED_NAMESPACE env var evaluates to the empty string, falling back to watching the 'default' namespace.\n", watchedNamespace)
configMapData["watched_namespace"] = v1.NamespaceDefault
} else {
c.logger.Infof("Watch the %q namespace specified in the env variable WATCHED_NAMESPACE\n", watchedNamespace)
configMapData["watched_namespace"] = watchedNamespace
}
} else {
c.logger.Infof("Watch all namespaces. Set the WATCHED_NAMESPACE env var to restrict to a single namespace.\n", watchedNamespace)
configMapData["watched_namespace"] = v1.NamespaceAll
}
if configMapData["watched_namespace"] == "" {
c.logger.Infoln("No namespace to watch specified. Fall back to watching the 'default' namespace.")
configMapData["watched_namespace"] = v1.NamespaceDefault
}
/*
// env var takes priority over the same param from the operator ConfigMap
if configMapData["watched_namespace"] == "" {
c.logger.Infoln("No namespace to watch specified. Fall back to watching the 'default' namespace.")
configMapData["watched_namespace"] = v1.NamespaceDefault
}
*/
if c.config.NoDatabaseAccess {
configMapData["enable_database_access"] = "false"
}