

How do you notify yourself about the status of a container?
I usually notice if a container or application is down because that usually results in something in my house not working. Sounds stupid, but I’m not hosting a hyper available cluster at home.
Is there a “quick” way to know if a container has healthcheck as a feature.
Check the documentation
Does healthcheck feature simply depend on the developer of each app, or the person building the container?
If the developer adds a healthcheck feature, you should use that. If there is none, you can always build one yourself. If it’s a web app, a simple HTTP request does the trick, just validate the returned HTML - if the status code is 200 and the output contains a certain string, it seems to be up. If it’s not a web app, like a database, a simple SELECT 1 on the database could tell you if it’s reachable or not.
Is it better to simply monitor the http(s) request to each service? (I believe this in my case would make Caddy a single point of failure for this kind of monitor).
If you only run a bunch of web services that you use on demand, monitoring the HTTP requests to each service is more than enough. Caddy being a single point of failure is not a problem because your caddy being dead still results in the service being unusable. And you will immediately know if caddy died or the service behind it because the error message looks different. If the upstream is dead, caddy returns a 502, if caddy is dead, you’ll get a “Connection timed out”




Terraform and Puppet. Not very simple to get into, but extremely powerful and reliable.