[Bug 1266808] Re: No mechanism to wait until a started container is ready and has finished booting

[Serge Hallyn]

FWIW, I just tried the following:

sudo mknod /tmp/x1
sudo lxc-create -t ubuntu-cloud -n c1
sudo cat >> /var/lib/lxc/c1/config << EOF
lxc.mount.entry = /tmp/x1 x1 none bind,create=file 0 0
EOF
sudo cat > /var/lib/lxc/c1/rootfs/etc/init/x.conf << EOF
description "tell lxc monitor we are ready"
author "Serge Hallyn" <serge.hallyn at ubuntucom>

start on runlevel [2345]

task

script
	echo "READY" > /x1 || true
end script
EOF

Terminal 1: sudo tail -f /tmp/x1
Terminal 2: sudo lxc-start -n c1

"READY" showed up in my /tmp/x1 tail output as expected.  So this should
be a workable for what you want, to the point that I'm not sure whether
something more generic is desirable.

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https://bugs.launchpad.net/bugs/1266808

Title:
  No mechanism to wait until a started container is ready and has
  finished booting

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