Some configurations on the compute node is not right in a multinode devstack setup

[Senhua Huang]

I setup a two node devstack environment. On the controller node, the localrc is as below:
RECLONE=yes
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service quantum
enable_service tempest
FLOATING_RANGE=192.168.3.0/23
FIXED_RANGE=10.4.128.0/24
FIXED_NETWORK_SIZE=256
FLAT_INTERFACE=eth0
ADMIN_PASSWORD=secret
MYSQL_PASSWORD=secret
RABBIT_PASSWORD=secret
SERVICE_PASSWORD=secret
SERVICE_TOKEN=secret
HOST_IP=192.168.3.2
MULTI_HOST=True
LOGFILE=/opt/stack/logs

The localrc at another compute node is as below:
RECLONE=yes
HOST_IP=192.168.3.8
FLAT_INTERFACE=eth0
FIXED_RANGE=10.4.128.0/24
FIXED_NETWORK_SIZE=256
FLOATING_RANGE=192.168.3.0/23
MULTI_HOST=1
ADMIN_PASSWORD=secret
MYSQL_PASSWORD=secret
RABBIT_PASSWORD=secret
SERVICE_PASSWORD=secret
SERVICE_TOKEN=secret
MYSQL_HOST=192.168.3.2
RABBIT_HOST=192.168.3.2
Q_HOST=192.168.3.2
GLANCE_HOSTPORT=192.168.3.2:9292
ENABLED_SERVICES=n-cpu,rabbit,quantum,q-agt,c-sch,c-api,c-vol

After I ran $./stack.sh on both the controller node and the compute node. The compute node has the following errors on Cinder.
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/url.py", line 219, in _parse_rfc1738_args "Could not parse rfc1738 URL from string '%s'" % name) ArgumentError: Could not parse rfc1738 URL from string '' 2013-04-10 18:10:19 INFO [cinder.service] Child 20312 exited with status 2

Then I checked the /etc/cinder/cinder.conf on the compute node and found that sql_connection is not set. I manually filled in the sql_connection as mysql://cinder:openstack@192.168.3.2/cinder. the problem went away.

When I tried to boot a server using $nova boot --image ** --flavor 1 --availability-zone nova:comp test1, the compute node has the following error on Nova:
TRACE nova.network.quantumv2 Unauthorized: [Errno > 111] ECONNREFUSED

Then I checked the /etc/nova/nova.conf on the compute node and found that quantum_admin_auth_url was set to use the ip of the compute node 192.168.3.8, rather than the controller node 192.168.3.2. I corrected this error and the problem went away.

It seems to me that the script might not correctly update these two configuration files on the compute nodes.

[Tal Kain (talkain)]

Hey,

I had the same issue and I just found out how to fix it.

First:
afc29fe5f210a8e78bafaafe7e8b3b5de733971c "Deprecate DATABASE_TYPE and use_database" - changed the way devstack configures the database you use. If you look at the current "ENABLED_SERVICES" you will see "mysql" is configured in it. When you re-configured it as http://devstack.org/guides/multinode-lab.html suggest, you will disable the compute node's database.
So just add mysql to the end of your ENABLED_SERVICES line.

Second:
As far as I can see 7e79d9139f931e45f732de9a39cc54bedd95bd6f's changes created a bug.

This patch fixes it:

From 4a9eb2582d704f5f4ebb6532eb0436285d3de0fe Mon Sep 17 00:00:00 2001
From: Tal Kain <email address hidden>
Date: Mon, 22 Apr 2013 17:50:27 +0300
Subject: [PATCH] lib/database: Fixed a bug in database_connection_url that
 was created by d95bd6f's changes

7e79d9139f931e45f732de9a39cc54bedd95bd6f's changes simplified the usage of database_connection_url_mysql and database_connection_url_postgresql without making the proper changes to database_connection_url.

Signed-off-by: Tal Kain <email address hidden>
---
 lib/database | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/lib/database b/lib/database
index e63d5e2..08e360f 100644
--- a/lib/database
+++ b/lib/database
@@ -110,13 +110,11 @@ function configure_database {
     configure_database_$DATABASE_TYPE
 }

-# Generate an SQLAlchemy connection URL and store it in a variable
-# $1 The variable name in which to store the connection URL
-# $2 The name of the database
+# Generate an SQLAlchemy connection URL and output it using echo
+# $1 The name of the database
 function database_connection_url {
- local var=$1
- local db=$2
- database_connection_url_$DATABASE_TYPE $var $db
+ local db=$1
+ database_connection_url_$DATABASE_TYPE $db
 }

--
1.7.9.5

Good luck!
Tal Kain.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/27703
Committed: http://github.com/openstack-dev/devstack/commit/0729d06fae1ee005d553350b729b233256032590
Submitter: Jenkins
Branch: master

commit 0729d06fae1ee005d553350b729b233256032590
Author: Tal Kain <email address hidden>
Date: Mon Apr 22 17:50:27 2013 +0300

    lib/database: Fixed a bug in database_connection_url

    The changes from https://review.openstack.org/#/c/23364/ simplified
    the usage of database_connection_url_mysql and
    database_connection_url_postgresql without making the proper changes
    to database_connection_url.

    Fixes: bug #1167668
    Signed-off-by: Tal Kain <email address hidden>
    Change-Id: I5115d123ad794f2eb2e144b76932031af5248f26