Basic DevStack installation

Most basic DevStack installation of kuryr-kubernetes is pretty simple. This document aims to be a tutorial through installation steps.

Document assumes using Ubuntu LTS 20.04 (using server or cloud installation is recommended, but desktop will also work), but same steps should apply for other operating systems. It is also assumed that git and curl are already installed on the system. DevStack will make sure to install and configure OpenStack, Kubernetes and dependencies of both systems.

Please note, that DevStack installation should be done inside isolated environment such as virtual machine, since it will make substantial changes to the host.

Cloning required repositories

First of all, you’ll need a user account, which can execute passwordless sudo command. Consult DevStack Documentation for details, how to create one, or simply add line:

"USERNAME ALL=(ALL) NOPASSWD:ALL"

to /etc/sudoers using visudo command. Remember to change USERNAME to the real name of the user account.

Clone DevStack:

$ git clone https://opendev.org/openstack-dev/devstack

Copy sample local.conf (DevStack configuration file) to devstack directory:

$ curl https://opendev.org/openstack/kuryr-kubernetes/raw/branch/master/devstack/local.conf.sample \
  -o devstack/local.conf

Note

local.conf.sample file is configuring Neutron and Kuryr with OVN ML2 networking. In the kuryr-kubernetes/devstack directory there are other sample configuration files that enable Open vSwitch instead OVN. networking. See other pages in this documentation section to learn more.

Now edit devstack/local.conf to set up some initial options:

  • If you have multiple network interfaces, you need to set HOST_IP variable to the IP on the interface you want to use as DevStack’s primary. DevStack sometimes complain about lacking of HOST_IP even if there is single network interface.

  • If you already have Docker installed on the machine, you can comment out line starting with enable_plugin devstack-plugin-container.

Once local.conf is configured, you can start the installation:

$ devstack/stack.sh

Installation takes from 20 to 40 minutes. Once that’s done you should see similar output:

=========================
DevStack Component Timing
 (times are in seconds)
=========================
wait_for_service       8
pip_install          137
apt-get              295
run_process           14
dbsync                22
git_timed            168
apt-get-update         4
test_with_retry        3
async_wait            71
osc                  200
-------------------------
Unaccounted time     505
=========================
Total runtime        1427

=================
 Async summary
=================
 Time spent in the background minus waits: 140 sec
 Elapsed time: 1427 sec
 Time if we did everything serially: 1567 sec
 Speedup:  1.09811



This is your host IP address: 10.0.2.15
This is your host IPv6 address: ::1
Keystone is serving at http://10.0.2.15/identity/
The default users are: admin and demo
The password: pass

Services are running under systemd unit files.
For more information see:
https://docs.openstack.org/devstack/latest/systemd.html

DevStack Version: xena
Change:
OS Version: Ubuntu 20.04 focal

You can test DevStack by sourcing credentials and trying some commands:

$ source devstack/openrc admin admin
$ openstack service list
+----------------------------------+------------------+------------------+
| ID                               | Name             | Type             |
+----------------------------------+------------------+------------------+
| 07e985b425fc4f8a9da20970a26f754a | octavia          | load-balancer    |
| 1dc08cb4401243848a562c0042d3f40a | neutron          | network          |
| 35627730938d4a4295f3add6fc826261 | nova             | compute          |
| 636b43b739e548e0bb369bc41fe1df08 | glance           | image            |
| 90ef7129985e4e10874d5e4ddb36ea01 | keystone         | identity         |
| ce177a3f05dc454fb3d43f705ae24dde | kuryr-kubernetes | kuryr-kubernetes |
| d3d6a461a78e4601a14a5e484ec6cdd1 | nova_legacy      | compute_legacy   |
| d97e5c31b1054a308c5409ee813c0310 | placement        | placement        |
+----------------------------------+------------------+------------------+

To verify if Kubernetes is running properly, list its nodes and check status of the only node you should have. The correct value is “Ready”:

$ kubectl get nodes
NAME        STATUS    AGE       VERSION
localhost   Ready     2m        v1.6.2

To test kuryr-kubernetes itself try creating a Kubernetes pod:

$ kubectl create deployment --image busybox test -- sleep 3600
$ kubectl get pods -o wide
NAME                    READY     STATUS              RESTARTS   AGE       IP        NODE
test-3202410914-1dp7g   0/1       ContainerCreating   0          7s        <none>    localhost

After a moment (even up to few minutes as Docker image needs to be downloaded) you should see that pod got the IP from OpenStack network:

$ kubectl get pods -o wide
NAME                    READY     STATUS    RESTARTS   AGE       IP          NODE
test-3202410914-1dp7g   1/1       Running   0          35s       10.0.0.73   localhost

You can verify that this IP is really assigned to Neutron port:

[stack@localhost kuryr-kubernetes]$ openstack port list | grep 10.0.0.73
| 3ce7fd13-ad0a-4e92-9b6f-0d38d50b1699 |     | fa:16:3e:8e:f4:30 | ip_address='10.0.0.73', subnet_id='ddfbc8e9-68da-48f9-8a05-238ea0607e0d' | ACTIVE |

If those steps were successful, then it looks like your DevStack with kuryr-kubernetes is working correctly. In case of errors, copy last ~50 lines of the logs, paste them into paste.openstack.org and ask other developers for help on Kuryr’s IRC channel. More info on how to use DevStack can be found in DevStack Documentation, especially in section Using Systemd in DevStack, which explains how to use systemctl to control services and journalctl to read its logs.