Multi-host devstack guide

[hongbin]

We have a document for developer to setup a single host devstack environment, but there is no document for setting up a multi-host dev environment. It would be good to have one.

* Document for setting up single-host Zun environment: https://docs.openstack.org/developer/zun/dev/quickstart.html#exercising-the-services-using-devstack
* Document for setting up multi-host devstack environment: https://docs.openstack.org/developer/devstack/guides/multinode-lab.html

We could possibly produce multi-host Zun environment by referencing the documents above.

[Lana (loquacity)]

For the record, docs now give you the ability to write and maintain an Install/Deployment guide in your own repo, and publish it up to the main docs site at docs.openstack.org (so your users can find it). Instructions are here: https://docs.openstack.org/contributor-guide/project-guides.html

[Yongfeng Du (dolpherdu)]

Tried with the following local.conf:
=============================
[[local|localrc]]
# HOST_IP=$(ip addr | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1 -d'/')
# MultiHOST
HOST_IP=10.0.0.34
DATABASE_PASSWORD=password
RABBIT_PASSWORD=password
SERVICE_TOKEN=password
SERVICE_PASSWORD=password
ADMIN_PASSWORD=password
enable_plugin zun https://git.openstack.org/openstack/zun
enable_plugin kuryr-libnetwork https://git.openstack.org/openstack/kuryr-libnetwork

SERVICE_HOST=10.0.0.35

MULTI_HOST=True
MYSQL_HOST=10.0.0.35
RABBIT_HOST=10.0.0.35
GLANCE_HOSTPORT=10.0.0.35:9292

ENABLED_SERVICES=zun-compute,kuryr-libnetwork
=====================
has following problems:
1. the /etc/zun/zun.conf is not correctly set because SERVICE_HOST/XXX_HOST is not respected by plugin.sh
2. zun-api/etcd was enabled.

Need to fix the devstack plugin first

[hongbin (hongbin034)]

I see. Feel free to open another bug for the devstack issue.

[Yongfeng Du (dolpherdu)]

https://bugs.launchpad.net/zun/+bug/1691606
After the devstack fixes, seems there are more issues need to be addressed before doc changes.
I remove myself from assignee, any one can continue with this effort.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/466166

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/466166
Committed: https://git.openstack.org/cgit/openstack/zun/commit/?id=8a1c854be2fc76ae0e7167b9fa32833268019ac8
Submitter: Jenkins
Branch: master

commit 8a1c854be2fc76ae0e7167b9fa32833268019ac8
Author: Yongfeng Du <email address hidden>
Date: Fri May 19 11:23:16 2017 +0800

    Add multi host part for devstack guide

    Add guide for set up the standalone zun-compute nodes.

    Change-Id: I87d80fa9790b68f407cfa25ab3fbfa97bbb10b34
    Closes-Bug: #1675245

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/zun 0.2.0 release.