Here are a couple of blogs on the atomic command http://developerblog.redhat.com/2015/04/21/introducing-the-atomic-command/ http://www.projectatomic.io/blog/2015/04/using-environment-substitution-with-the-atomic-command/ atomic command is available for both fedora and fedora atomic host. On 08/10/2015 08:43 AM, Daniel J Walsh wrote: > > On 08/10/2015 08:31 AM, Robert P. J. Day wrote: >> On Mon, 10 Aug 2015, Daniel J Walsh wrote: >> >>> On 08/10/2015 05:43 AM, Robert P. J. Day wrote: >>>> brief digression from my discussion of docker roadmap and stuff like >>>> that ... i'm using the sample Dockerfiles from the >>>> "fedora-dockerfiles" package to demonstrate various Dockerfile >>>> instructions in an upcoming course, and i ran across this: >>>> >>>> cockpit-ws/Dockerfile:LABEL INSTALL /usr/bin/docker run -ti --rm --privileged -v /:/host IMAGE /container/atomic-install >>>> cockpit-ws/Dockerfile:LABEL UNINSTALL /usr/bin/docker run -ti --rm --privileged -v /:/host IMAGE /cockpit/atomic-uninstall >>>> cockpit-ws/Dockerfile:LABEL RUN /usr/bin/docker run -d --privileged --pid=host -v /:/host IMAGE /container/atomic-run --local-ssh >>>> >>>> i have no idea what those lines mean, they don't even seem valid as >>>> the documentation suggests the proper form of a Dockerfile LABEL >>>> instruction requires an "=" sign. >>>> >>>> what does the above mean, if anything? >>>> >>>> rday >>>> >>> I think the = sign is optional. >> ah, "man Dockerfile" doesn't mention that -- bugzilla time? >> >>> Although I would prefer it in the form of >>> >>> LABEL INSTALL="/usr/bin/docker run -ti --rm --privileged -v /:/host IMAGE /container/atomic-install" >> as would i. by the way, i'm assuming there's nothing magical about >> the labels INSTALL, UNINSTALL or RUN, right? they're simply being >> added as metadata to the image as documentation that someone can dig >> out later with "docker inspect"? beyond that, they have no special >> power, is that correct? > The special power it the "atomic run|install|uninstall" command will > automatically use them > > atomic install cockpit-ws > > Does a > > docker pull cockpit-ws > > Then docker inspect to get the INSTALL label, > then it executes the INSTALL label substituting environment variables > like ${NAME} and ${IMAGE} > > Do a man atomic. > >>> And with the latest atomic we now support >>> >>> LABEL INSTALL="/usr/bin/docker run -ti --rm --privileged -v /:/host \${IMAGE} /container/atomic-install" >> just to clarify these two uses of IMAGE, the first one will simply >> keep the literal string "IMAGE", correct? while the second will use >> escaping so that the label saved will incorporate the literal string >> "$(IMAGE}" -- i'm assuming to show the reader that that is supposed to >> represent an image name? >> >> rday >> > No in either case IMAGE will be substituted with the image specified on the > atomic install command. > > -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
