September 2019 - Podman - Podman List Archives

GraphRoot
by Lou DeGenaro 03 Oct '19

03 Oct '19

I made a change to storage.conf as follows: graphroot = "/tmp/degenaro/.local/share/containers/storage" Yet, when I run podman info: GraphRoot: /tmp/podman/degenaro/.local/share/containers/storage Why does the string /podman still appear in GraphRoot? Thanks. Lou.

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Restart bash during a build
by bryan.hepworth＠gmail.com 03 Oct '19

03 Oct '19

Hi all One of the containers I'm trying to build has a component that requires restarting the current she'll to continue. I've seen other suggestions via Google but haven't had any success. Would be grateful if any one could comment. Thank you Bryan

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linking of containers
by Filak, Jakub 26 Sep '19

26 Sep '19

Greetings! Do you plan to add `--link` to`podman run`? Regards, Jakub

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Re: linking of containers
by Filak, Jakub 25 Sep '19

25 Sep '19

I probably misused podman. I do not use it for creating pods. I use podman as a substitute for Docker. I want to build a GitHub Pull Requst builder for ABAP projects. I want to start a fresh container for every build. Every new container gets its own IP - (not as Docker which starts with 172.17.0.2). My host is RHEL with not so recent Node which I need to run some ABAP transformations, thus I use another container with the most recent Node and Python. The tools container must know hostname or IP of the ABAP system container because ABAP systems are reachable only via TCP. (I cannot rely on the fact that IPs are assigned sequentially from 172.17.0.2 ...) I wanted to use `run --link` but it is not supported at all. I thought I can use `run --net` to share Network NS with the ABAP system but it seems that `--net` has different semantics than Docker's `--net`. Eventually I use IP=$(podman inspect --format {{ .NetworkSettings.IPAddress }} abap) and `podman run --add-host abap:$IP ...` It so not so convenient but it works for me. ________________________________ From: Matt Heon Sent: Monday, September 23, 2019 18:54 To: Filak, Jakub Cc: podman(a)lists.podman.io Subject: Re: [Podman] linking of containers On 2019-09-23 16:07, Filak, Jakub wrote: >Greetings! > >Do you plan to add `--link` to`podman run`? > > >Regards, >Jakub >_______________________________________________ >Podman mailing list -- podman(a)lists.podman.io >To unsubscribe send an email to podman-leave(a)lists.podman.io No, we don't presently have plans to add `--link` support. We prefer pods for allowing inter-container communication. If you have a use-case for which pods don't work, we'd be interested in hearing about it. Thanks, Matt Heon

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name resolution between containers
by Brent Baude 19 Sep '19

19 Sep '19

Folks, There is a proof of concept available now that can allow name resolution between containers on the same network. The enablement is done by a CNI plugin and dnsmasq. I have added a tutorial on how to try this out in https://github.com/containers/dnsname/pull/7 . You need to be using the latest upstream Podman code as well until 1.6 is officially released.

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proper way to detect running inside a container?
by Robert P. J. Day 15 Sep '19

15 Sep '19

dropped into existing project, where all Makefiles do the following test to see if they're running inside docker: ifneq ($(wildcard /.dockerenv),) i'm pretty sure that's just asking for trouble, and i've perused a github issue related to that: https://github.com/containers/libpod/issues/648 so what is the *proper* way to detect if one is running inside a container? the way that seems most reliable is to check /proc/1/sched. thoughts? rday

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Containerfile in addition to Dockerfiles for building container images
by Aric Renzo 13 Sep '19

13 Sep '19

Hello Everyone, I am fairly new the Podman community. My name is Aric Renzo and I am a DevOps engineer based on Charlotte NC. I have a passion for container technology and even wrote a book on the now semi-defunct Ansible Container project. I've been watching Podman, CRI-O, and Open Container Initiative projects for quite some time and I am quite impressed with Podman and Buildah providing a fantastic interface for launching Kubernetes style pods and managing them almost exactly like traditional Docker. The community has done an absolutely wonderful job in shifting the mindsets of developers and engineers away from "Docker containers" and "Docker images" towards a more general, platform agnostic, "containers" and "container images". Especially since Docker simply builds and runs OCI container images. I am writing this email in regards to an issue I opened up on the Buildah repo yesterday: https://github.com/containers/buildah/issues/1853 . Essentially, my idea is that if we keep using "Dockerfiles" and "docker-compose.yml" files to build and test images, it will continue to be an uphill battle to shift perception away from Docker being the be-all-end-all of containers. After all, why would someone want to use Podman to build their Dockerfiles, or CRI-O to run them when they can just keep using Docker instead? This is why I would suggest using a more vendor neutral, "Containerfile" and "container-compose.yml" vernacular instead. After all, Podman and even Docker do not build "Docker images". They build OCI container images. Hence, it does not make much sense to keep using "Dockerfile" or "docker-compose.yml" files. However, since I opened this issue, I have been thinking that while this would be a relatively easy code change to get Podman/Buildah to recognize the presence of "Containerfile" inside a repo and build it, this is far more of a cultural shift more than anything else. I think that if the community decides to go this direction, it would be helpful for Podman and other OCI projects to evangelize and promote a new standard for setting up the general instruction file to build and ship open container images. I am open to thoughts and feedback regarding this. I'm wondering if using a standard like this while great for Podman/Buildah to adopt is more of an open container initiative community discussion as well? I'm curious about what the Podman community thinks? Thank you for your time. I'm excited to meet and interact with everyone in the community. Thanks, -- *Aric A. Renzo*

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process change to releases and fedora packaging
by Brent Baude 12 Sep '19

12 Sep '19

Hi Folks, We wanted to make the wider podman audience aware of a small change we are making for podman releases starting with 1.6. Prior to each release, we will be tagging a release.rc1 (release candidate). The idea here is we want to allow for some of our sister teams to be able to test a release prior to cutting it. These release candidates will be automatically built in Fedora rawhide and the previous two Fedora versions (generally). However, no bodhi will be created for the rc's; they are reserved for actual releases. We are hoping this helps us improve our releases and make our process smoother. Brent

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podman equivalent for docker-compose?
by Robert P. J. Day 11 Sep '19

11 Sep '19

was extolling the virtues of podman to a colleague, who seemed interested but asked what the podman-based alternative was for "docker compose". rather than mislead her, i thought i would ask the experts. thoughts? rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ========================================================================

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Docker substitution and file permissions
by Josh Berkus 10 Sep '19

10 Sep '19

The following works in docker: docker run -p 4000:4000 -v $(pwd):/srv/jekyll:Z jekyll/jekyll:pages jekyll serve & ... but in podman: podman run -p 4000:4000 -v $(pwd):/srv/jekyll:Z jekyll/jekyll:pages jekyll serve & jekyll 3.8.5 | Error: Permission denied @ dir_s_mkdir - /srv/jekyll/_site pwd is a directory owned by me, and I'm running podman as me. What's missing here? -- -- Josh Berkus Kubernetes Community Red Hat OSAS

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