Dmytro Titov's questions

I'm running a simple Kubernetes deployment descriptor with podman play kube and some of my services need env vars to be set. In Docker Compose/Swarm I could just place the names of env-vars to the file and they would be picked up from a host OS. Alternatively, I could use .env file with Docker Compose for this purpose. But none of these seem to work with podman. I know that Kubernetes offers ConfigMaps for this purpose, but it also doesn't seem to be implemented in podman play kube. So what's the way of propagating OS environment variables to the container in this case, because I don't really want to explicitly hardcode the values in the .yaml file?

We are running a stack of Docker Swarm services and, according to our Privacy Policy, we have to keep logs only for the last 6 months, but no older. I was trying to achieve it through different logging drivers, but all of them (AFAIK) work only with max file-size, but not with times/dates.

The one solution that I came up with: use json-file logging driver and then setup logrotate.d with rotate 180 and daily options.

The problem, however, is that json-file logging driver doesn't disable standard Docker logging (I mean docker logs -f ... or docker service logs -f ...) which uses some internal Docker storage for logs, as per documentation:

Only the json-file and journald drivers make the logs available directly from docker-compose up and docker-compose logs. Using any other driver does not print any logs.

In this case, the rotation will work for json-file logs, but the "internal" logs will be still kept longer.

So, I wonder, how can one achieve time-based Docker log rotation?

I have configured PuTTY for accessing my instances as described in the instruction. I have set the hostname as it's displayed in my instance dashboard - everything works great. But when I restart my instance, it's public IP address (as well as public DNS) is different (AFAIU they are being rearranged each time the instance restarts). So I have to reconfigure my connection in PuTTY. Is there any way to get some constant configuration that will work regardless changing IP address?

P.S.: I know that Elastic IP's are the solution, but I'm interested in some other options.