Basic DevStack installation

updated: 2020-11-26 08:24

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 Centos 7 OS, but same steps should apply for other operating systems. It is also assumed that git is already installed on the system. DevStack will make sure to install and configure OpenStack, Kubernetes and dependencies of both systems.

Cloning required repositories¶

First of all you need to clone DevStack:

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

Create user stack, give it required permissions and log in as that user:

$ ./devstack/tools/create-stack-user.sh
$ sudo su stack

stack user has /opt/stack set as its home directory. It will need its own repository with DevStack. Also clone kuryr-kubernetes:

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

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

$ cp kuryr-kubernetes/devstack/local.conf.sample devstack/local.conf

Note

local.conf.sample file is configuring Neutron and Kuryr with standard Open vSwitch ML2 networking. In the devstack directory there are other sample configuration files that enable OpenDaylight or Drangonflow 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.
KURYR_K8S_LBAAS_USE_OCTAVIA can be set to False if you want more lightweight installation. In that case installation of Glance and Nova will be omitted.
If you already have Docker installed on the machine, you can comment out line starting with enable_plugin devstack-plugin-container.
If you want to disable kuryr-daemon add disable_service kuryr-daemon line. Please note that running without kuryr-daemon was deprecated in Rocky release.

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

$ ./devstack/stack.sh

Installation takes from 15 to 30 minutes. Once that’s done you should see similar output:

=========================
DevStack Component Timing
 (times are in seconds)
=========================
run_process            5
test_with_retry        2
pip_install           48
osc                  121
wait_for_service       1
yum_install           31
dbsync                27
-------------------------
Unaccounted time     125
=========================
Total runtime        360



This is your host IP address: 192.168.101.249
This is your host IPv6 address: fec0::5054:ff:feb0:213a
Keystone is serving at http://192.168.101.249/identity/
The default users are: admin and demo
The password: password

WARNING:
Using lib/neutron-legacy is deprecated, and it will be removed in the future


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

DevStack Version: queens
Change: 301d4d1678c3c1342abc03e51a74574f7792a58b Merge "Use "pip list" in check_libs_from_git" 2017-10-04 07:22:59 +0000
OS Version: CentOS 7.4.1708 Core

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

$ source /devstack/openrc admin admin
$ openstack service list
+----------------------------------+------------------+------------------+
| ID                               | Name             | Type             |
+----------------------------------+------------------+------------------+
| 091e3e2813cc4904b74b60c41e8a98b3 | kuryr-kubernetes | kuryr-kubernetes |
| 2b6076dd5fc04bf180e935f78c12d431 | neutron          | network          |
| b598216086944714aed2c233123fc22d | keystone         | identity         |
+----------------------------------+------------------+------------------+

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 run --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.

updated: 2020-11-26 08:24

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