Re: [libvirt] [PATCH 2/2] Add support for podman in Makefile.ci

This way more users can run our CI builds locally. Signed-off-by: Martin Kletzander <mkletzan(a)redhat.com&gt; --- Makefile.ci | 125 ++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 93 insertions(+), 32 deletions(-) diff --git a/Makefile.ci b/Makefile.ci index 12a62167cc67..e2989ada313c 100644 --- a/Makefile.ci +++ b/Makefile.ci @@ -17,7 +17,7 @@ CI_GIT_ROOT = $(shell git rev-parse --show-toplevel) CI_HOST_SRCDIR = $(CI_SCRATCHDIR)/src # The directory holding the source inside the -# container. ie where we told Docker to expose +# container. ie where we want to expose # the $(CI_HOST_SRCDIR) directory from the host CI_CONT_SRCDIR = /src @@ -46,14 +46,13 @@ CI_CONFIGURE_ARGS = # cloning them CI_SUBMODULES = $(shell git submodule | awk '{ print $$2 }') -# Location of the Docker images we're going to pull +# Location of the container images we're going to pull # Can be useful to overridde to use a locally built # image instead CI_IMAGE_PREFIX = quay.io/libvirt/buildenv- -# Docker defaults to pulling the ':latest' tag but -# if the Docker repo above uses different conventions -# this can override it +# The default tag is ':latest' but if the container +# repo above uses different conventions this can override it CI_IMAGE_TAG = :master # We delete the virtual root after completion, set @@ -71,24 +70,82 @@ CI_REUSE = 0 CI_UID = $(shell id -u) CI_GID = $(shell id -g) -# Docker doesn't require the IDs you run as to exist in +# Container engine runtime we are going to use, can be overridden per make +# invocation, if it is not, we try podman and then default to docker. +ifeq ($(CI_CENGINE),) + CI_CENGINE = $(shell podman version >/dev/null && echo podman || echo docker) +endif + +# IDs you run as do not need to exist in # the container's /etc/passwd & /etc/group files, but -# if they do not, then libvirt's 'make check' will fail +# if they do not, then libvirt's 'make check' will fail # many tests. -# -# We do not directly mount /etc/{passwd,group} as Docker -# is liable to mess with SELinux labelling which will -# then prevent the host accessing them. Copying them -# first is safer. -CI_PWDB_MOUNTS = \ - --volume $(CI_SCRATCHDIR)/group:/etc/group:ro,z \ - --volume $(CI_SCRATCHDIR)/passwd:/etc/passwd:ro,z \ - $(NULL) +ifeq ($(CI_CENGINE),podman) + CI_PWDB_MOUNTS = \ + --volume /etc/group:/etc/group:ro,z \ + --volume /etc/passwd:/etc/passwd:ro,z \ + $(NULL) +else + # We do not directly mount /etc/{passwd,group} as Docker + # is liable to mess with SELinux labelling which will + # then prevent the host accessing them. Copying them + # first is safer. + CI_PWDB_MOUNTS = \ + --volume $(CI_SCRATCHDIR)/group:/etc/group:ro,z \ + --volume $(CI_SCRATCHDIR)/passwd:/etc/passwd:ro,z \ + $(NULL) +endif

+ +ifeq ($(CI_CENGINE),docker) + # Docker containers can have very large ulimits + # for nofiles - as much as 1048576. This makes + # libvirt very slow at exec'ing programs. + CI_ULIMIT_FILES = 1024 +endif

-# Docker containers can have very large ulimits -# for nofiles - as much as 1048576. This makes -# libvirt very slow at exec'ing programs. -CI_ULIMIT_FILES = 1024 +ifeq ($(CI_CENGINE),podman) + # Podman cannot reuse host namespace when running non-root containers. Until + # support for --keep-uid is added we can just create another mapping that will + # do that for us. Beware, that in {uid,git}map=container_id:host_id:range, + # the host_id does actually refer to the uid in the first mapping where 0 + # (root) is mapped to the current user and rest is offset. + + # In order to set up this mapping, we need to keep all the user IDs to prevent + # possible errors as some images might expect UIDs up to 90000 (looking at you + # fedora), so we don't want the overflowuid to be used for them. For mapping + # all the other users properly ther eneeds to be some math done. Don't worry, + # it's just addition and subtraction. + + # 65536 ought to be enough (tm), but for really rare cases the maximums might + # need to be higher, but that only happens when your /etc/sub{u,g}id allow + # users to have more IDs. Unless --keep-uid is supported, let's do this in a + # way that should work for everyone. + CI_MAX_UID = $(shell sed -n "s/^$USER:[^:]\+://p" /etc/subuid) + CI_MAX_GID = $(shell sed -n "s/^$USER:[^:]\+://p" /etc/subgid) + ifeq ($(CI_MAX_UID),) + CI_MAX_UID = 65536 + endif + ifeq ($(CI_MAX_GID),) + CI_MAX_GID = 65536 + endif + CI_UID_OTHER = $(shell echo $$(($(CI_UID)+1))) + CI_GID_OTHER = $(shell echo $$(($(CI_GID)+1))) + CI_UID_OTHER_RANGE = $(shell echo $$(($(CI_MAX_UID)-$(CI_UID)))) + CI_GID_OTHER_RANGE = $(shell echo $$(($(CI_MAX_GID)-$(CI_GID)))) + + CI_PODMAN_ARGS = \ + --uidmap 0:1:$(CI_UID) \ + --uidmap $(CI_UID):0:1 \ + --uidmap $(CI_UID_OTHER):$(CI_UID_OTHER):$(CI_UID_OTHER_RANGE) \ + --gidmap 0:1:$(CI_GID) \ + --gidmap $(CI_GID):0:1 \ + --gidmap $(CI_GID_OTHER):$(CI_GID_OTHER):$(CI_GID_OTHER_RANGE) \ + $(NULL) +else + CI_DOCKER_ARGS = \ + --ulimit nofile=$(CI_ULIMIT_FILES):$(CI_ULIMIT_FILES) \ + $(NULL) +endif # Args to use when cloning a git repo. # -c stop it complaining about checking out a random hash @@ -100,7 +157,7 @@ CI_GIT_ARGS = \ --local \ $(NULL) -# Args to use when running the Docker env +# Args to use when running the container # --rm stop inactive containers getting left behind # --user we execute as the same user & group account # as dev so that file ownership matches host @@ -110,27 +167,30 @@ CI_GIT_ARGS = \ # --ulimit lower files limit for performance reasons # --interactive # --tty Ensure we have ability to Ctrl-C the build -CI_DOCKER_ARGS = \ +CI_CENGINE_ARGS = \ --rm \ --user $(CI_UID):$(CI_GID) \ --interactive \ --tty \ + $(CI_PODMAN_ARGS) \ + $(CI_DOCKER_ARGS) \ $(CI_PWDB_MOUNTS) \ --volume $(CI_HOST_SRCDIR):$(CI_CONT_SRCDIR):z \ --workdir $(CI_CONT_SRCDIR) \ - --ulimit nofile=$(CI_ULIMIT_FILES):$(CI_ULIMIT_FILES) \ $(NULL)