vagrant-ceph

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NOTE: There is sesdev which is also a vagrant based tool to deploy SES/Ceph.

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Create a vagrant configuration to support multiple ceph cluster topologies. Ideal for development or exploration of Ceph.

Usage

Review the config.yml. All addresses are on private networks. Each commented section lists the requirements for a configuration and approximate initialization time.

The current setup supports both libvirt and virtualbox as providers. Note that kvm and vbox kernel modules cannot be loaded simultaneously.

Libvirt plugin

Install the plugin if needed.

$ vagrant plugin install vagrant-libvirt

Or use script in case you have openSUSE:

# curl https://raw.githubusercontent.com/openSUSE/vagrant-ceph/master/openSUSE_vagrant_setup.sh -o openSUSE_vagrant_setup.sh
# chmod +x openSUSE_vagrant_setup.sh
# sudo ./openSUSE_vagrant_setup.sh

Enable KSM (Kernel Samepage Merge)

In order to reduce the total memory used to set a ceph cluster, one could enable the KSM by issuing the follow command as root: echo 1 >/sys/kernel/mm/ksm/run

For more info check KSM's page.

Workaround 1

On most systems, this workaround isn't required. Only apply it if you see that libvirt isn't supported:

fog-1.30.0 seems to remove support for libvirt. To workaround this issue, run the following as well if needed

$ vagrant plugin uninstall fog

$ vagrant plugin install --plugin-version 1.29.0 fog

Workaround 2

Encountering an error similar to the following:

ERROR:  Could not find a valid gem 'fog-core' (>= 0), here is why:
          Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=error: certificate verify failed (https://api.rubygems.org/specs.4.8.gz)

Update the gem in vagrant. Download from http://guides.rubygems.org/ssl-certificate-update/#installing-using-update-packages.

/opt/vagrant/embedded/bin/gem install --local /tmp/rubygems-update-2.6.7.gem
/opt/vagrant/embedded/bin/update_rubygems --no-ri --no-rdoc
/opt/vagrant/embedded/bin/gem uninstall rubygems-update -x

For background on this issue, see https://gist.github.com/luislavena/f064211759ee0f806c88.

Then, rerun the plugin installation above.

Adding Vagrant boxes

There are a couple of methods to add boxes.

Adding box from the command line

Suppose we want to add a Kubic image. A suitable Vagrant box for such an image is available in the openSUSE download server. Specifically, the file we want is openSUSE-MicroOS.x86_64-Kubic-kubeadm-Vagrant.box, so we can directly add the box to our local list of Vagrant boxes by issuing a single command:

$ vagrant box add --provider libvirt --name opensuse/MicroOS-Kubic-kubeadm http://download.opensuse.org/tumbleweed/appliances/openSUSE-MicroOS.x86_64-Kubic-kubeadm-Vagrant.box

By the way, more info on how to use Kubic images with vagrant-ceph is available in the openSUSE:Ceph Wiki.

Following is another example of adding a Vagrant box for openSUSE Leap 15.1, from the openSUSE Virtualization Appliances repo:

vagrant box add --provider libvirt --name virt-appl/openSUSE-Leap-15.1 https://download.opensuse.org/repositories/Virtualization:/Appliances:/Images:/openSUSE-Leap-15.1/images/Leap-15.1.x86_64-libvirt.box

By successfully executing this command we end up with a local Vagrant box for openSUSE Leap 15.1:

$ vagrant box list

virt-appl/openSUSE-Leap-15.1 (libvirt, 0)

Then, to build a Leap 15.1-based cluster all we have to do is type the following:

BOX="virt-appl/openSUSE-Leap-15.1" vagrant up

Boxes from the Vagrant Cloud

Standard (Vagrant) boxes from the openSUSE project in the Vagrant Cloud should not be added manually. When you assign a standard box in the BOX environment variable or you directly specify it in the Vagrantfile, then vagrant automatically searches for the box in the Vagrant Cloud. Provided the box exists, it is downloaded and added to your local list of Vagrant boxes. An example of a standard box is this: opensuse/openSUSE-Tumbleweed-Vagrant.x86_64. Should you choose to use it, all you have to do is type BOX="opensuse/openSUSE-Tumbleweed-Vagrant.x86_64" vagrant up.

Boxes from local files

Choose the box you wish to use from the boxes subdirectory.

$ ls boxes/

sle12-sp3.x86_64-0.0.1.libvirt.json
SLE-12.x86_64-1.12.0.libvirt-Build6.25.json
SLE-12.x86_64-1.12.0.virtualbox-Build6.25.json
Tumbleweed.x86_64-1.13.2.libvirt-Build2.34.json
Tumbleweed.x86_64-1.13.2.virtualbox-Build2.34.json

For instance, add the SLE 12 SP3 box for libvirt with the following command:

$ vagrant box add boxes/sle12-sp3.x86_64-0.0.1.libvirt.json

Use the box

Edit Vagrantfile and set BOX, INSTALLATION and CONFIGURATION. Set BOX = 'SUSE/SLE-15-SP1' for an initial test. Alternatively, you may specify a Vagrant box via an environment variable like this...

$ BOX="SUSE/SLE-15-SP1" vagrant up

...or like this:

$ export BOX="SUSE/SLE-15-SP1"

Before you can start the environment you need to double check if you can ssh into localhost

$ ssh root@localhost

If that isn't possible please check your /etc/ssh/sshd_config file and change the following option:

$ PermitRootLogin yes

Afterwards copy your pub-key by entering

$ ssh-copy-id root@localhost

Start the environment.

$ vagrant up

If the admin node starts prior to the other nodes, vagrant will complain that the admin node failed. (This has been inconsistent depending on an environment.) Run the provisioning step to compete the setup.

$ vagrant provision

For libvirt, note that the base box image and VM OS disks are added to /var/lib/libvirt/images with additional disks added as raw partitions for the data nodes.

For virtualbox, the VM OS disks are stored in your home directory. The additional disks for the data nodes are stored in $HOME/disks.

Next, log into the admin node and become root.

$ vagrant ssh admin

vagrant@admin:~> sudo su -

You may now begin a ceph installation.

Customizations

This repository diverged from it's origin in following features:

• Partly overwrite configs under files/
  • If you deploy different versions of ceph you might need different settings. This allows you to do so.
• Import the ssh pubkey from your $HOME
• Allow SUSEConnect registrations
• include a comprehensive .bash_history on the master
• More cluster sizes and configurations

Partly overwrite configurations

files/installation_mode/HOST holds files that will be copied over to the HOST. If you deploy different kinds of Versions of SLES/SES you can create subdirectories that match the following pattern:

files/<b>installation_mode</b>/<b>BOX</b>_<b>CONFIGURATION</b>

I.e. "SLE12-SP3_default"

This directory can hold a single file that differs from the default tree in files/installation_mode/HOST

Options for files upload

files:
  @node: false/true/merge/custom

• false - don't upload files
• true - upload directory that matches node name
• custom - upload only directory BOX_CONFIGURATION
• merge - upload both node directory as well as BOX_CONFIGURATION directory

Caveats

For the sake of completeness and stating the obvious, the private ssh key is only suitable for demonstrations and should never be used in a real environment.

The ceph-deploy installation option does not automatically install ceph. The environment is created to allow the running of ceph-deploy. For automatic installation, compare the salt installation option.

The default root password is 'vagrant'.