Today I have tried coreOS inside vmware player and it has been pretty easy. So now I’m ready to share the steps I have followed:
OVA file can be imported in both vmware and virtualbox:
curl -LO https://stable.release.core-os.net/amd64-usr/current/coreos_production_vmware_ova.ova
We have to created the file
user_data with the following yaml content, changing ssh-rsa line with our own public key:
#cloud-config # include one or more SSH public keys ssh_authorized_keys: - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGdByTgSVHq....... coreos: etcd2: # generate a new token for each unique cluster from https://discovery.etcd.io/new?size=3 # specify the initial size of your cluster with ?size=X discovery: https://discovery.etcd.io/<token> advertise-client-urls: http://$private_ipv4:2379,http://$private_ipv4:4001 initial-advertise-peer-urls: http://$private_ipv4:2380 # listen on both the official ports and the legacy ports # legacy ports can be omitted if your application doesn't depend on them listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001 listen-peer-urls: http://$private_ipv4:2380 units: - name: etcd2.service command: start - name: fleet.service command: start
Now we are going to create
configdrive.iso with the
mkdir -p /tmp/new-drive/openstack/latest cp user_data /tmp/new-drive/openstack/latest/user_data mkisofs -R -V config-2 -o configdrive.iso /tmp/new-drive rm -r /tmp/new-drive
In the case you are using windows 10, you can open a
bash for windows, and install
sudo apt-get install genisoimage
Attach the ISO as a DVD
After that it is enough to attach the ISO file that we have just created to the virtual machine and start it. CoreOS will detect it and we will be able to log-in with the user
core using our own private key. CoreOS doesn’t have a default password, so this is mandatory.
CoreOS has a very limited functionality included in its core. That’s ideal for performance and security.
- We have some tools available from the beginning: docker, git, wget, curl, vi.
- But we don’t have: nano, gcc, php, python, ruby, svn, or other tools.
In order to access advanced functionality, coreOS offers the tool
/bin/toolbox that starts a container with fedora mounting the main file system in
/media/root. In this fedora we can install whatever we want: starting with
php. And in the case we need to access our main filesystem, we have it mounted as