Run docker in docker

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docker run --privileged -i -t -d --restart=unless-stopped -p 2376:2376 -p 10000-11000:10000-11000 -p 10000-11000:10000-11000/udp -v /mnt/opt:/opt:rw -v /etc/docker:/etc/docker:ro -v /mnt/var/lib/docker:/var/lib/docker --name=docker docker:dind  -H tcp://0.0.0.0:2376 --storage-driver=aufs --tlsverify --tlscacert /etc/docker/ca.pem --tlscert /etc/docker/server.pem --tlskey /etc/docker/server-key.pem

To create an overlay network on multiple hosts over swarm, following are required:

• a key-value store service: this is used for broadcasting hosts / swarm agents. It can be same kv store swarm used for discovery
• Run docker daemon with following parameters:
  • cluster-store: where the store is
  • cluster-advertise: what network interface to be advertised
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What is Docker and why?

See here

In short:

• Docker is a container tech based on LXC
• Much less resource than VM by sharing cores
• But provide full run-time isolation
• It makes system deployment much faster
• and easier system operation

Still don’t know why? Check out use cases here