| #!/bin/sh |
| set -e |
| |
| # DinD: a wrapper script which allows docker to be run inside a docker container. |
| # Original version by Jerome Petazzoni <jerome@docker.com> |
| # See the blog post: https://blog.docker.com/2013/09/docker-can-now-run-within-docker/ |
| # |
| # This script should be executed inside a docker container in privileged mode |
| # ('docker run --privileged', introduced in docker 0.6). |
| |
| # Usage: dind CMD [ARG...] |
| |
| # apparmor sucks and Docker needs to know that it's in a container (c) @tianon |
| export container=docker |
| |
| if [ -d /sys/kernel/security ] && ! mountpoint -q /sys/kernel/security; then |
| mount -t securityfs none /sys/kernel/security || { |
| echo >&2 'Could not mount /sys/kernel/security.' |
| echo >&2 'AppArmor detection and --privileged mode might break.' |
| } |
| fi |
| |
| # Mount /tmp (conditionally) |
| if ! mountpoint -q /tmp; then |
| mount -t tmpfs none /tmp |
| fi |
| |
| # cgroup v2: enable nesting |
| if [ -f /sys/fs/cgroup/cgroup.controllers ]; then |
| # move the processes from the root group to the /init group, |
| # otherwise writing subtree_control fails with EBUSY. |
| # An error during moving non-existent process (i.e., "cat") is ignored. |
| mkdir -p /sys/fs/cgroup/init |
| xargs -rn1 < /sys/fs/cgroup/cgroup.procs > /sys/fs/cgroup/init/cgroup.procs || : |
| # enable controllers |
| sed -e 's/ / +/g' -e 's/^/+/' < /sys/fs/cgroup/cgroup.controllers \ |
| > /sys/fs/cgroup/cgroup.subtree_control |
| fi |
| |
| if [ $# -gt 0 ]; then |
| exec "$@" |
| fi |
| |
| echo >&2 'ERROR: No command specified.' |
| echo >&2 'You probably want to run hack/make.sh, or maybe a shell?' |
