Using Linuxkit Generated Iso In Docker For Mac Linuxkit is a new project presented by Docker during the DockerCon 2017. If we look at the description of the project on: A secure, portable and lean operating system built for containers I am feeling already exited.
Next, follow the cRPD installation instructions (and specifically the section titled Download the cRPD Software ) to download a.tgz file containing the crpd image. This is a tarball that Docker will recognize and allow you to import into your local Docker image cache. Continue only once you see your image in the output of docker image ls grep crpd. To build the example configuration. You can also specify different output formats, eg linuxkit build -format raw-bios linuxkit.yml to output a raw BIOS bootable disk image, or linuxkit build -format iso-efi linuxkit.yml to output an EFI bootable ISO image. See linuxkit build -help for more information. Booting and Testing. You can use linuxkit. I wanna create a docker image from an ISO file. And I meet the same question like this iso to docker file. I did same operations with him, and I know it's wrong now. Now what i have is: an ISO file. My own ISO file, based on ubuntu but it's not ubuntu. A computer, running ubuntu on it. Once you have built the tool, use. Linuxkit build linuxkit.yml to build the example configuration. You can also specify different output formats, eg linuxkit build -format raw-bios linuxkit.yml to output a raw BIOS bootable disk image, or linuxkit build -format iso-efi linuxkit.yml to output an EFI bootable ISO image.
LinuxKit is one of Docker’s latest creations to provide an immutable simple OS thatcan run containers and other container platforms. The goal is to provide a simple to update, secure, and maintain OS thatcan facilitate container deployments.
It turns out that Digital Rebar Provision can easily deploy LinuxKit images. The example assets provided with Digital RebarProvision contains some examples of LinuxKit deployments.
There are three currently available. Though they are really simple and easily cloned.
- lk-sshd - the example sshd
- lk-k8s-master - the k8s project master image
- lk-k8s-node - the k8s project node image
Here are the following steps that work on an Ubuntu 16.04 desktop with KVM already setup. The basic overview is:
- Get and start dr-provision
- Configure dr-provision to handle KVM network
- Get and build LinuxKit
- Make some ISOs
- Install BootEnvs
- Run Nodes
Let’s hit each of the steps. For a simple play with it trial, create a directory for both Digital Rebar Provisionand LinuxKit.
Also, there is a video of these steps.
Get, Start, and Configure Digital Rebar Provision¶
There are already many pages for this, Quick Start and Production Install. The main thing is to use thetip version at the moment. It is best to include the discovery and sledgehammer images. The KVMsystem used (the Digital Rebar test tool, kvm-slave) always PXE boots and machines can be easily added just bystarting them.
For a simple trail, use the install process with the –isolated flag.
Something like:
Get and Build LinuxKit¶
First, create a directory for everything, clone LinuxKit, and build it. This assumes that go install was executed.
After a few minutes, there should be a bin directory with moby ready to go.
Make some ISOs¶
The provided BootEnv deploying the sshd example and k8s project. To build these, we need to do a couple of things.
- Edit the examples/sshd.yml
- Replace the “#your ssh key here” line with the contents of the SSH public key. e.g. ~/.ssh/id_rsa.pub
Run the moby build command
This will generate an ISO, sshd.iso. Copy this file into the assets/isos directory (creating it if it doesn’t exist) in thedr-provision install directory.
Additionally, we can build the Kubernetes images. We still need to edit a couple of files.
cd projects/kubernetes
- Edit the k8s-master.yml
- Replace the “#your ssh key here” line with the contents of the SSH public key. e.g. ~/.ssh/id_rsa.pub
- Edit the k8s-node.yml
- Replace the “#your ssh key here” line with the contents of the SSH public key. e.g. ~/.ssh/id_rsa.pub
- Edit the Makefile
- Add -output iso-bios to the moby build lines. This will make sure to make ISOs.
- E.g. ../../bin/moby build -output iso-bios -name kube-master kube-master.yml
- E.g. ../../bin/moby build -output iso-bios -name kube-node kube-node.yml
Run the make command
This will generate two ISO images, kube-master.iso and kube-node.iso. Copy these files into the assets/iso directory in thedr-provision install directory.
Install BootEnvs¶
At this point, we can add the BootEnv to Digital Rebar Provision.
Change to the Digital Rebar Provision directory and then to the assets directory.
Run the following
This will make all three BootEnv available for new nodes.
Run Nodes¶
Using Linuxkit Generated Iso In Docker Command
At this point, it is possible to boot some nodes and run them. They can have pre-existing nodes or discovered nodes. This willuse discovered nodes.
First, start some nodes. The Digital Rebar team prefers kvm-slave tool that starts KVM on my Digital Rebar Provision network. .e.g. tools/kvm-slaveAnything that PXEs and can three will work.
Once they are discovered, something like this from drpcli machines list should appear:
At this point, the BootEnv field should be changed to the environment of choice.
Now, reboot those kvm instances (close the KVM console window or kill the qemu process). Once the systemsboot up, it should be possible to ssh into them from the account the ssh key is from (as root).
And that is all for the sshd image.
Using Linuxkit Generated Iso In Docker Linux
For Kubernetes, a few more steps are required. In this example, 192.168.124.22 is the master. We need to SSH into its kubeletcontainer and start kubeadm. Something like this:
This will run for a while and start up the master. It will output a line that looks like this:
Using Linuxkit Generated Iso In Docker
This will need to run on each k8s-node. It is necessary to SSH into the kubelet on the k8s node. Something like this:
Now, wait for a while and if the KVM instances have Internet access, then kubernetes will be up. The default access for this clusteris through the kubelet container though others are probably configurable.
Using Linuxkit Generated Iso In Docker Download
There are ssh helper scripts in the linuxkit/projects/kubernetes directory, but they do not always work with the latestk8s containers.