Add docker-compose by default

[tomaswarynyca]

And if possible, would be great to have docker-compose as part of the OS available as well

The user @x-jokay proposed in the issues #6 add by default docker-compose in BurmillaOS
We could create an option in the cloud-config.yml to enable docker-compose

[PrplHaz4]

I'd use this also - with the ability to update the version of compose as needed. This might be more tricky than it seems as there is probably some redundancy with ros service - but migrating that to "plain" compose seems like an extra nice-to-have goal.

[olljanat]

It is very easy add docker-compose as system service.

Tricky part is get that how to command available inside of console container. Code contains some extra logic to handle it for user docker and we most likely need something similar.

This code makes user docker commands available to console:

os/cmd/control/util.go

Lines 36 to 59 in 0308bfe

	func symLinkEngineBinary() []symlink {
	baseSymlink := []symlink{
	{"/usr/share/ros/os-release", "/usr/lib/os-release"},
	{"/usr/share/ros/os-release", "/etc/os-release"},
	{"/var/lib/rancher/engine/docker", "/usr/bin/docker"},
	{"/var/lib/rancher/engine/dockerd", "/usr/bin/dockerd"},
	{"/var/lib/rancher/engine/docker-init", "/usr/bin/docker-init"},
	{"/var/lib/rancher/engine/docker-proxy", "/usr/bin/docker-proxy"},
	// >= 18.09.0
	{"/var/lib/rancher/engine/containerd", "/usr/bin/containerd"},
	{"/var/lib/rancher/engine/ctr", "/usr/bin/ctr"},
	{"/var/lib/rancher/engine/containerd-shim", "/usr/bin/containerd-shim"},
	{"/var/lib/rancher/engine/runc", "/usr/bin/runc"},
	// < 18.09.0
	{"/var/lib/rancher/engine/docker-containerd", "/usr/bin/docker-containerd"},
	{"/var/lib/rancher/engine/docker-containerd-ctr", "/usr/bin/docker-containerd-ctr"},
	{"/var/lib/rancher/engine/docker-containerd-shim", "/usr/bin/docker-containerd-shim"},
	{"/var/lib/rancher/engine/docker-runc", "/usr/bin/docker-runc"},
	}
	return baseSymlink
	}

but I have not yet found that how container files gets visible to /var/lib/rancher/engine in first place.

[tomaswarynyca]

So by putting docker-compose in /var/lib/rancher/engine/docker-compose for example and making a symbolic link /usr/bin/docker-compose should the console recognize it?