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2016-11-10container: Pass a list of <file-system> objects as things to mount.Ludovic Courtès
* gnu/build/linux-container.scm (mount-file-systems): 'mounts' is now a list of <file-system> objects instead of a list of lists ("specs"). Add call to 'file-system->spec' as the argument to 'mount-file-system'. (run-container, call-with-container): Adjust docstring accordingly. * gnu/system/file-systems.scm (spec->file-system): New procedure. * gnu/system/linux-container.scm (container-script)[script]: Call 'spec->file-system' inside gexp. * guix/scripts/environment.scm (launch-environment/container): Remove call to 'file-system->spec'. * tests/containers.scm ("call-with-container, mnt namespace") ("call-with-container, mnt namespace, wrong bind mount"): Pass a list of <file-system> objects.
2016-10-19container: Allow 'container-excursion' to the same namespaces.Ludovic Courtès
Before that, 'container-excursion' would call 'setns' even when the target namespace is the one the caller is already in, which would fail. * gnu/build/linux-container.scm (container-excursion): Introduce 'source' and 'target'. Compare the result of 'readlink' on these instead of comparing file descriptors to decide whether to call 'setns'. * tests/containers.scm ("container-excursion, same namespace"): New test.
2016-05-31container: Gracefully report mount errors in the child process.Ludovic Courtès
Fixes <http://bugs.gnu.org/23306>. * gnu/build/linux-container.scm (run-container): Use 'socketpair' instead of 'pipe'. Rename 'in' to 'child' and 'out' to 'parent'. Send a 'ready message or an exception argument list from the child to the parent; adjust the parent accordingly. * tests/containers.scm ("call-with-container, mnt namespace, wrong bind mount"): New test. * tests/guix-environment-container.sh: Add test with --expose=/does-not-exist.
2016-05-31container: Gracefully handle failure to set up user namespaces.Ludovic Courtès
* gnu/build/linux-container.scm (run-container): Exit when the parent process doesn't say 'ready.
2016-01-23build: container: Make 'unprivileged-user-namespace-supported?' more robust.Mark H Weaver
* gnu/build/linux-container.scm (unprivileged-user-namespace-supported?): Only read and check the first character, to cope with a possible newline in the (pseudo-)file.
2015-11-03build: container: Add feature test predicates.David Thompson
* gnu/build/linux-container.scm (user-namespace-supported?, unprivileged-user-namespace-supported?, setgroups-supported?): New procedures. * tests/container.scm: Use predicates. * tests/syscalls.scm: Likewise.
2015-10-28container: Remove unnecessary CLONE_CHILD_* flags.Ludovic Courtès
* gnu/build/linux-container.scm (namespaces->bit-mask): Remove CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID, which are unneeded. Discussed at <http://bugs.gnu.org/21694>.
2015-10-10build: container: Fix call-with-clean-exit.David Thompson
Before, call-with-clean-exit would *always* return an exit code of 1. * gnu/build/linux-container.scm (call-with-clean-exit): Exit with status code of 0 if thunk does not throw an exception. * tests/containers.scm: Add test.
2015-09-07build: container: Use the same clone flags as fork(3).David Thompson
The intent is to make 'clone' behave a lot more like 'primitive-fork', which calls clone(2) with SIGCHLD, CLONE_CHILD_CLEARTID, and CLONE_CHILD_SETTID flags. Notably, running 'clone' at the REPL without these flags would break the REPL beyond repair. * guix/build/syscalls.scm (CLONE_CHILD_CLEARTID, CLONE_CHILD_SETTID): New variables. * gnu/build/linux-container.scm (namespaces->bit-mask): Add CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID to bit mask.
2015-09-07build: container: Setup /dev/console.David Thompson
* gnu/build/linux-container.scm (mount-file-systems): Bind mount the controlling terminal as /dev/console.
2015-08-08build: container: Add #:host-uids argument to call-with-container.David Thompson
It's not always possible to map 65536 uids when creating a container as the root user within another user namespace. This is true when building Guix within the build daemon's container. By using a uid range of 1 by default, even as the root user, the tests now pass. * gnu/build/linux-container.scm (initialize-user-namespace, run-container): Add 'host-uids' argument. (call-with-container): Add #:host-uids keyword argument. * tests/containers.scm ("container-excursion"): Update 'run-container' call.
2015-07-09gnu: build: Add Linux container module.David Thompson
* gnu/build/linux-container.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * .dir-locals.el: Add Scheme indent rules for 'call-with-container', and 'container-excursion'. * tests/containers.scm: New file. * Makefile.am (SCM_TESTS): Add it.
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