Cookies & Containers

Or how I learned to love the cloud.

Getting started with OpenStack

Getting started with OpenStack

2021-04-01-ipc.html · 2021-03-17-quick-openstack.html · 2020-11-03-windows-kubevirt-k3s.html

March 17, 2021 — The fastest way I found (after reading on components, which gazillions of parts there are and which you probably won't need) was to just run DevStack.

Note

DevStack is not for production and makes A LOT of changes to your system, so install it on a dedicated machine!

Installing OpenStack

The install for Ubuntu 18.04 I followed can be found here. First add a dedicated user (or just use ubuntu). The following are run as root, but can also be done with sudo.

# useradd -s /bin/bash -d /opt/stack -m stack # echo "stack ALL=(ALL) NOPASSWD: ALL" | tee /etc/sudoers.d/stack # su - stack

Download DevStack:

$ git clone https://opendev.org/openstack/devstack $ cd devstack

Create a config file. I added Heat and Ceilometer, but you might do just fine with the first five lines.

$ cat <<EOF > local.conf [[local|localrc]] ADMIN_PASSWORD=YourSuperSecretPassword DATABASE_PASSWORD=$ADMIN_PASSWORD RABBIT_PASSWORD=$ADMIN_PASSWORD SERVICE_PASSWORD=$ADMIN_PASSWORD #Enable heat services enable_service h-eng h-api h-api-cfn h-api-cw CEILOMETER_BACKEND=gnocchi enable_plugin ceilometer https://opendev.org/openstack/ceilometer enable_plugin aodh https://opendev.org/openstack/aodh EOF

After that just run

$ ./stack.sh

and then the install will kick off. This will take a few minutes. If you run into any errors like ERROR: Cannot uninstall 'wrapt'. during upgrade make sure the version you need is installed. For me it was fixed with pip install --ignore-installed wrapt==1.12.1 simplejson==3.17.2.

After the install you should have access to keystone, glance, nova, placement, cinder, neutron, horizon and also ceilometer and heat if you used my local.conf. Try pointing a browser to the IP of the Ubuntu machine, it should give you the OpenStack interface where you can login as *admin* with the password defined in your config file.

Commandline Access

To use the command line install the OpenStack client locally

$ pip install python-openstackclient

and then create an openrc file:

export OS_PROJECT_DOMAIN_NAME=default export OS_USER_DOMAIN_NAME=default export OS_PROJECT_NAME=admin export OS_USERNAME=admin export OS_PASSWORD=YourSuperSecretPassword export OS_AUTH_URL=http://<ServerIP>/identity export OS_IDENTITY_API_VERSION=3 export OS_IMAGE_API_VERSION=2

and don't forget to source openrc. Try it with e.g.

$ openstack user list

Creating your first VM

Start of by either importing a public key or creating a keypair in OpenStack.

$ openstack keypair create --public-key ~/.ssh/yourkey.pub NEW_KEY_NAME

Create a new security group to allow ping and SSH:

$ openstack security group create ssh_icmp_access --description Allows ICMP and SSH access from anywhere $ openstack security group rule list ssh_icmp_access #Should return nothing $ openstack security group rule create ssh_icmp_access --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0 $ openstack security group rule create --protocol icmp ssh_icmp_access

Create a router with a public address:

$ openstack router create router

Get the public network ID (DevStack creates a public, private and shared network by default), the public-subnet ID and the router ID.

$ openstack router list $ openstack network list $ openstack subnet list

And then set up the router:

$ openstack router set ROUTER_ID --external-gateway PUBLIC_NETWORK_ID $ openstack router add subnet ROUTER_ID PUBLIC_SUBNET_ID

Add an image after downloading it (for example Debian):

$ openstack image create --container-format bare --disk-format qcow2 \ --file debian-9-openstack-amd64.qcow2 debian-9-openstack-amd64

Launch an instance. The flavor is the machine size (e.g. 1 is 512MB RAM and 1vCPU, 3 is 4096MB RAM and 4vCPUs), the image ID can be checked with openstack image list.

$ openstack server create --flavor 3 --image IMAGE_ID --key-name NEW_KEY_NAME \ --security-group ssh_icmp_access DEBIAN_INSTANCE_NAME

Connect the instance to the private network Assign floating IP to instance interface (make sure it’s the private network)

$ openstack floating ip create public $ openstack server add floating ip DEBIAN_INSTANCE_NAME FLOATING_IP

Now you should be able to SSH into that server with the private key and floating IP address, using the debian user

$ ssh -i ~/.ssh/yourkey debian@FLOATING_IP

Notes

For more info check out the OpenStack docs.

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