podman | Podman : A tool for managing OCI containers and pods | Continuous Deployment library

I am trying to run the Elasticsearch image on my Mac m1 laptop using podman. It will fail with the message:

ERROR: [1] bootstrap checks failed. You must address the points described in the following [1] lines before starting Elasticsearch. bootstrap check failure [1] of [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

I can solve this temporarily by using ssh to enter the podman machine vm and setting vm.max_map_count with

sudo sysctl -w vm.max_map_count=262144

However, if I stop and restart the podman machine vm, the setting is back to the default 65530.

Is there a way to permanently set vm.max_map_count for the podman machine vm?

Is it possible to use Testcontainers with Podman in Java tests? As of March 2022 Testcontainers library doesn't detect an installed Podman as a valid Docker environment.

Can Podman be a Docker replacement on both MacOS with Apple silicon (local development environment) and Linux x86_64 (CI/CD environment)?

I'm trying to use Podman to build an image of a Spring Boot project in IntelliJ. Jetbrain's guide suggests to "Select TCP socket and specify the Podman API service URL in Engine API URL" within Build,Execution,Deployment > Docker (see https://www.jetbrains.com/help/idea/podman.html).

However, when giving the TCP socket found on Podman's documentation (see https://docs.podman.io/en/latest/markdown/podman-system-service.1.html), IntelliJ says it cannot connect.

Finally, when here is the error that appears in terminal:

I am deploying several Pods using podman-compose. To do so, each pod has its own definition in a podman-compose.yaml file that I execute in rootless mode (so all containers in a Pod coexist in the same host/IP). However, I would like to make able a container in a Pod to reach a service exposed by a container in another pod.

I know Kubernetes has the Service object that let pods communicate between them. But I don't want to use K8S...

So my question is: Is there any 'equivalent' or workaround I could use to reach such a communication between pods? Not only in the Podman ecosystem, but in the Linux's one.

Ideally, I would like to use a DNS that lets containers resolve the IP of other containers in other pods. Should I use my machine (where all pods are running) DNS to proxy requests between pods? And more importantly, is this a good practice?

Sorry if the answer is pretty obvios, I am new in the IT world.

Anyway, thank you all in advance!

What I am trying is to create a container isolated otherwise but having a port open for access from outside. I'd like to keep it so that container can't access internet.

I have internal network and container that has a single port open for accessing the service.

example docker-compose.yml:

Ii'm having a hard time figuring out how to proxypass into a nodejs container from a nginx container.

seems to me that http://localhost:3000 would fall inside the nginx container...so I thought this setup would make sense:

nginx container:

I have podman installed on a CentOS 8 machine. I want to switch to Docker so need to remove podman first because it conflicts with Docker. However, when I try to remove it I get this:

I'd like to build a container using Podman which would contains the following:

• a Python application
• the Python modules I developed but which are not stored at the same place than the Python application
• the Python environment (made with miniconda/mambaforge)
• a mounted folder for input data
• a mounted folder for output data

To do that, I've added a Dockerfile in my home directory. I had to put the Dockerfile at a such high path level because it seems that it needs to be above any folder I want to add in the container. Indeed, I've tried to add folders using rising path with "../../some/path/" but it doesn't work. Then, a first question is: Is there a solution to add folders which are not below (in path) the Dockerfile?

Below is the content of the Dockerfile: