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stop docker service before exit
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67806aa90a
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1
DOCS.md
1
DOCS.md
@ -1,6 +1,7 @@
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Use the Docker plugin to build and push Docker images to a registry.
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The following parameters are used to configuration this plugin:
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* **registry** - authenticates to this registry
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* **username** - authenticates with this username
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* **password** - authenticates with this password
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* **email** - authenticates with this email
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@ -5,10 +5,16 @@
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FROM ubuntu:14.04
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RUN apt-get update -qq \
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&& apt-get -y install curl \
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&& apt-get -y install curl \
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apt-transport-https \
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ca-certificates \
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curl \
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lxc \
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iptables \
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&& curl -sSL https://get.docker.com/ubuntu/ | sh \
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&& rm -rf /var/lib/apt/lists/*
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ADD drone-docker /go/bin/
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ADD wrapdocker /bin/
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ENTRYPOINT ["/go/bin/drone-docker"]
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21
main.go
21
main.go
@ -32,13 +32,27 @@ func main() {
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os.Exit(1)
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}
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stop := func() {
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cmd := exec.Command("start-stop-daemon", "--stop", "--pidfile", "/var/run/docker.pid")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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cmd.Run()
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}
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defer stop()
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// Starts the Docker daemon
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go func() {
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cmd := exec.Command("docker", "-d")
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cmd.Dir = clone.Dir
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cmd := exec.Command("/bin/bash", "/bin/wrapdocker")
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cmd.Stdout = ioutil.Discard
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cmd.Stderr = ioutil.Discard
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cmd.Run()
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cmd = exec.Command("docker", "-d", "-s", "overlay")
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cmd.Stdout = ioutil.Discard
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cmd.Stderr = ioutil.Discard
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trace(cmd)
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cmd.Run()
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}()
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// Sleep for a few seconds
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@ -71,6 +85,7 @@ func main() {
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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stop()
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os.Exit(1)
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}
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@ -81,6 +96,7 @@ func main() {
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cmd.Stderr = os.Stderr
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err = cmd.Run()
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if err != nil {
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stop()
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os.Exit(1)
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}
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@ -92,6 +108,7 @@ func main() {
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trace(cmd)
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err = cmd.Run()
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if err != nil {
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stop()
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os.Exit(1)
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}
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}
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88
wrapdocker
Normal file
88
wrapdocker
Normal file
@ -0,0 +1,88 @@
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#!/bin/bash
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# Ensure that all nodes in /dev/mapper correspond to mapped devices currently loaded by the device-mapper kernel driver
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dmsetup mknodes
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# First, make sure that cgroups are mounted correctly.
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CGROUP=/sys/fs/cgroup
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: {LOG:=stdio}
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[ -d $CGROUP ] ||
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mkdir $CGROUP
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mountpoint -q $CGROUP ||
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mount -n -t tmpfs -o uid=0,gid=0,mode=0755 cgroup $CGROUP || {
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echo "Could not make a tmpfs mount. Did you use --privileged?"
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exit 1
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}
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if [ -d /sys/kernel/security ] && ! mountpoint -q /sys/kernel/security
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then
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mount -t securityfs none /sys/kernel/security || {
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echo "Could not mount /sys/kernel/security."
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echo "AppArmor detection and --privileged mode might break."
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}
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fi
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# Mount the cgroup hierarchies exactly as they are in the parent system.
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for SUBSYS in $(cut -d: -f2 /proc/1/cgroup)
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do
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[ -d $CGROUP/$SUBSYS ] || mkdir $CGROUP/$SUBSYS
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mountpoint -q $CGROUP/$SUBSYS ||
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mount -n -t cgroup -o $SUBSYS cgroup $CGROUP/$SUBSYS
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# The two following sections address a bug which manifests itself
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# by a cryptic "lxc-start: no ns_cgroup option specified" when
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# trying to start containers withina container.
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# The bug seems to appear when the cgroup hierarchies are not
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# mounted on the exact same directories in the host, and in the
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# container.
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# Named, control-less cgroups are mounted with "-o name=foo"
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# (and appear as such under /proc/<pid>/cgroup) but are usually
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# mounted on a directory named "foo" (without the "name=" prefix).
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# Systemd and OpenRC (and possibly others) both create such a
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# cgroup. To avoid the aforementioned bug, we symlink "foo" to
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# "name=foo". This shouldn't have any adverse effect.
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echo $SUBSYS | grep -q ^name= && {
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NAME=$(echo $SUBSYS | sed s/^name=//)
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ln -s $SUBSYS $CGROUP/$NAME
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}
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# Likewise, on at least one system, it has been reported that
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# systemd would mount the CPU and CPU accounting controllers
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# (respectively "cpu" and "cpuacct") with "-o cpuacct,cpu"
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# but on a directory called "cpu,cpuacct" (note the inversion
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# in the order of the groups). This tries to work around it.
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[ $SUBSYS = cpuacct,cpu ] && ln -s $SUBSYS $CGROUP/cpu,cpuacct
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done
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# Note: as I write those lines, the LXC userland tools cannot setup
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# a "sub-container" properly if the "devices" cgroup is not in its
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# own hierarchy. Let's detect this and issue a warning.
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grep -q :devices: /proc/1/cgroup ||
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echo "WARNING: the 'devices' cgroup should be in its own hierarchy."
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grep -qw devices /proc/1/cgroup ||
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echo "WARNING: it looks like the 'devices' cgroup is not mounted."
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# Now, close extraneous file descriptors.
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pushd /proc/self/fd >/dev/null
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for FD in *
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do
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case "$FD" in
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# Keep stdin/stdout/stderr
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[012])
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;;
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# Nuke everything else
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*)
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eval exec "$FD>&-"
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;;
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esac
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done
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popd >/dev/null
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# If a pidfile is still around (for example after a container restart),
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# delete it so that docker can start.
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rm -rf /var/run/docker.pid
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