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I always wanted to ask a question about docker, if the local devel machine is ubuntu 12.04, I can not deploy my docker image build to a 10.04 ubuntu server, right? (Unless you run a 12.04 virtual machine or something.)
I always wanted to ask a question about docker, if the local devel machine is ubuntu 12.04, I can not deploy my docker image build to a 10.04 ubuntu server, right? (Unless you run a 12.04 virtual machine or something.)
The kernel version has to be the same.
Earlier quoted context omitted.
You can actually do the same thing with LXC containers; it is trivial to rsync a snapshot or compressed archive of a snapshot to another host machine and run it there.
Anything not pro-docker usually gets downvoted by shykes and his ring of cronies.
I always wanted to ask a question about docker, if the local devel machine is ubuntu 12.04, I can not deploy my docker image build to a 10.04 ubuntu server, right? (Unless you run a 12.04 virtual machine or something.)
I doubt there are packages for 10.04 so you'd be on your own getting it working
Earlier quoted context omitted.
> I really don't like giving up the isolation of modern hypervisors You don't have to! Think of docker as a unit of software delivery, rather than resource allocation. It's very common to use Docker to either a) deploy only trusted containers on the same machine, or b) deploy only 1 container per machine. There are also cases where linux cgroups and namespaces are an appropriate security mechanism (usually combined w…
How about OS patching? If I am running hundreds of different containers and I need to patch the OS (let's say upgrade the kernel or a driver), will I affect hundreds of applications at once? If so this will be a problem for several shops. How about built-in failover? On a virtualized environment you can run a cluster and the VM will move to another host in case of failure. Does docker support that? Is that what the d…
Kernel upgrades would affect all of the containers running under that kernel (machine or VM) at the same time. Though, if you wanted to be super cautious, you could upgrade kernel on an empty container host (quite easy if virtualized) and migrate containers to it and test them on an individual basis.
Docker doesn't add a whole lot over what basic Linux containers (lxc and vserver) have offered for years. Having said that, the main benefit to Docker is a change in viewpoint from "virtual machine" to "application". Docker aims to make applications portably deployable to any Docker-machine. Since Docker uses lxc (aka Linux containers), it helps to understand a little how containers are different from other virtualiz…
I always wanted to ask a question about docker, if the local devel machine is ubuntu 12.04, I can not deploy my docker image build to a 10.04 ubuntu server, right? (Unless you run a 12.04 virtual machine or something.)
Yes you can do that, but it only supports 64bit operating systems at the moment and you need a kernel that supports linux containers & union file systems. I doubt there are packages for 10.04 so you'd be on your own getting it working
debootstrap lucid ./rootfs && tar -C ./rootfs -c . | docker import nl/ubuntu-lucid
docker run -i -t nl/ubuntu-lucid bashI really don't like giving up the isolation of modern hypervisors, particularly those with Intel virtualization extensions. Docker (and LXC) seems like a huge step backwards for security. I'm sure there are use cases, but I'd never multi-tenant with it.
Sry but link says it all. No further comment from me: http://marc.info/?l=openbsd-misc&m=119318909016582&w=2