I need to create and mantain some global variables accessible for applications running in all namespaces, because some tools/apps are standard in my dev cluster.

For example:

• APM ENDPOINT
• APM User/pass
• RabbitMQ endpoint
• MongoDB endpoint

For any reason, when i change/migrate any global variable, i want to change one time for all running applications in cluster (just needed restart pod), and if a create an "global" configmap and read in envFrom, i need to change/update the configmap in all namespaces.

Someone have an idea to do this? I thinked to use Hashicorp vault with specific role for global environments, but i need to adapt all applications to use Vault, and maybe have better idea.

Thanks

CodePudding user response：

There is no in-built solution in Kubernetes for it except for creating a ConfigMap, and use envFrom to define all of the ConfigMap's data as Pod environment variables, which will indeed require to update them separately for each namespace. So using HashiCorp Vault is a better solution here; one more option here can be trying to customize env with Kubernetes addons like this.