c988bf6fde
Updated MYSQL_PASSWORD to DATABASE_PASSWORD in sample configuration and existing docs Change-Id: Iafb295a0b7707e08a81e6528620db8543d40f7ae
378 lines
11 KiB
ReStructuredText
378 lines
11 KiB
ReStructuredText
==============
|
|
Multi-Node Lab
|
|
==============
|
|
|
|
Here is OpenStack in a realistic test configuration with multiple
|
|
physical servers.
|
|
|
|
Prerequisites Linux & Network
|
|
=============================
|
|
|
|
Minimal Install
|
|
---------------
|
|
|
|
You need to have a system with a fresh install of Linux. You can
|
|
download the `Minimal
|
|
CD <https://help.ubuntu.com/community/Installation/MinimalCD>`__ for
|
|
Ubuntu releases since DevStack will download & install all the
|
|
additional dependencies. The netinstall ISO is available for
|
|
`Fedora <http://mirrors.kernel.org/fedora/releases/>`__
|
|
and
|
|
`CentOS/RHEL <http://mirrors.kernel.org/centos/>`__.
|
|
|
|
Install a couple of packages to bootstrap configuration:
|
|
|
|
::
|
|
|
|
apt-get install -y git sudo || yum install -y git sudo
|
|
|
|
Network Configuration
|
|
---------------------
|
|
|
|
The first iteration of the lab uses OpenStack's FlatDHCP network
|
|
controller so only a single network will be required. It should be on
|
|
its own subnet without DHCP; the host IPs and floating IP pool(s) will
|
|
come out of this block. This example uses the following:
|
|
|
|
- Gateway: 192.168.42.1
|
|
- Physical nodes: 192.168.42.11-192.168.42.99
|
|
- Floating IPs: 192.168.42.128-192.168.42.254
|
|
|
|
Configure each node with a static IP. For Ubuntu edit
|
|
``/etc/network/interfaces``:
|
|
|
|
::
|
|
|
|
auto eth0
|
|
iface eth0 inet static
|
|
address 192.168.42.11
|
|
netmask 255.255.255.0
|
|
gateway 192.168.42.1
|
|
|
|
For Fedora and CentOS/RHEL edit
|
|
``/etc/sysconfig/network-scripts/ifcfg-eth0``:
|
|
|
|
::
|
|
|
|
BOOTPROTO=static
|
|
IPADDR=192.168.42.11
|
|
NETMASK=255.255.255.0
|
|
GATEWAY=192.168.42.1
|
|
|
|
Installation shake and bake
|
|
===========================
|
|
|
|
Add the DevStack User
|
|
---------------------
|
|
|
|
OpenStack runs as a non-root user that has sudo access to root. There is
|
|
nothing special about the name, we'll use ``stack`` here. Every node
|
|
must use the same name and preferably uid. If you created a user during
|
|
the OS install you can use it and give it sudo privileges below.
|
|
Otherwise create the stack user:
|
|
|
|
::
|
|
|
|
groupadd stack
|
|
useradd -g stack -s /bin/bash -d /opt/stack -m stack
|
|
|
|
This user will be making many changes to your system during installation
|
|
and operation so it needs to have sudo privileges to root without a
|
|
password:
|
|
|
|
::
|
|
|
|
echo "stack ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
|
|
|
|
From here on use the ``stack`` user. **Logout** and **login** as the
|
|
``stack`` user.
|
|
|
|
Set Up Ssh
|
|
----------
|
|
|
|
Set up the stack user on each node with an ssh key for access:
|
|
|
|
::
|
|
|
|
mkdir ~/.ssh; chmod 700 ~/.ssh
|
|
echo "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyYjfgyPazTvGpd8OaAvtU2utL8W6gWC4JdRS1J95GhNNfQd657yO6s1AH5KYQWktcE6FO/xNUC2reEXSGC7ezy+sGO1kj9Limv5vrvNHvF1+wts0Cmyx61D2nQw35/Qz8BvpdJANL7VwP/cFI/p3yhvx2lsnjFE3hN8xRB2LtLUopUSVdBwACOVUmH2G+2BWMJDjVINd2DPqRIA4Zhy09KJ3O1Joabr0XpQL0yt/I9x8BVHdAx6l9U0tMg9dj5+tAjZvMAFfye3PJcYwwsfJoFxC8w/SLtqlFX7Ehw++8RtvomvuipLdmWCy+T9hIkl+gHYE4cS3OIqXH7f49jdJf jesse@spacey.local" > ~/.ssh/authorized_keys
|
|
|
|
Download DevStack
|
|
-----------------
|
|
|
|
Grab the latest version of DevStack:
|
|
|
|
::
|
|
|
|
git clone https://git.openstack.org/openstack-dev/devstack
|
|
cd devstack
|
|
|
|
Up to this point all of the steps apply to each node in the cluster.
|
|
From here on there are some differences between the cluster controller
|
|
(aka 'head node') and the compute nodes.
|
|
|
|
Configure Cluster Controller
|
|
----------------------------
|
|
|
|
The cluster controller runs all OpenStack services. Configure the
|
|
cluster controller's DevStack in ``local.conf``:
|
|
|
|
::
|
|
|
|
[[local|localrc]]
|
|
HOST_IP=192.168.42.11
|
|
FLAT_INTERFACE=eth0
|
|
FIXED_RANGE=10.4.128.0/20
|
|
FIXED_NETWORK_SIZE=4096
|
|
FLOATING_RANGE=192.168.42.128/25
|
|
MULTI_HOST=1
|
|
LOGFILE=/opt/stack/logs/stack.sh.log
|
|
ADMIN_PASSWORD=labstack
|
|
DATABASE_PASSWORD=supersecret
|
|
RABBIT_PASSWORD=supersecrete
|
|
SERVICE_PASSWORD=supersecrete
|
|
SERVICE_TOKEN=xyzpdqlazydog
|
|
|
|
In the multi-node configuration the first 10 or so IPs in the private
|
|
subnet are usually reserved. Add this to ``local.sh`` to have it run
|
|
after every ``stack.sh`` run:
|
|
|
|
::
|
|
|
|
for i in `seq 2 10`; do /opt/stack/nova/bin/nova-manage fixed reserve 10.4.128.$i; done
|
|
|
|
Fire up OpenStack:
|
|
|
|
::
|
|
|
|
./stack.sh
|
|
|
|
A stream of activity ensues. When complete you will see a summary of
|
|
``stack.sh``'s work, including the relevant URLs, accounts and passwords
|
|
to poke at your shiny new OpenStack. The most recent log file is
|
|
available in ``stack.sh.log``.
|
|
|
|
Configure Compute Nodes
|
|
-----------------------
|
|
|
|
The compute nodes only run the OpenStack worker services. For additional
|
|
machines, create a ``local.conf`` with:
|
|
|
|
::
|
|
|
|
[[local|localrc]]
|
|
HOST_IP=192.168.42.12 # change this per compute node
|
|
FLAT_INTERFACE=eth0
|
|
FIXED_RANGE=10.4.128.0/20
|
|
FIXED_NETWORK_SIZE=4096
|
|
FLOATING_RANGE=192.168.42.128/25
|
|
MULTI_HOST=1
|
|
LOGFILE=/opt/stack/logs/stack.sh.log
|
|
ADMIN_PASSWORD=labstack
|
|
DATABASE_PASSWORD=supersecret
|
|
RABBIT_PASSWORD=supersecrete
|
|
SERVICE_PASSWORD=supersecrete
|
|
SERVICE_TOKEN=xyzpdqlazydog
|
|
DATABASE_TYPE=mysql
|
|
SERVICE_HOST=192.168.42.11
|
|
MYSQL_HOST=$SERVICE_HOST
|
|
RABBIT_HOST=$SERVICE_HOST
|
|
GLANCE_HOSTPORT=$SERVICE_HOST:9292
|
|
ENABLED_SERVICES=n-cpu,n-net,n-api-meta,c-vol
|
|
NOVA_VNC_ENABLED=True
|
|
NOVNCPROXY_URL="http://$SERVICE_HOST:6080/vnc_auto.html"
|
|
VNCSERVER_LISTEN=$HOST_IP
|
|
VNCSERVER_PROXYCLIENT_ADDRESS=$VNCSERVER_LISTEN
|
|
|
|
**Note:** the ``n-api-meta`` service is a version of the api server
|
|
that only serves the metadata service. It's needed because the
|
|
computes created won't have a routing path to the metadata service on
|
|
the controller.
|
|
|
|
Fire up OpenStack:
|
|
|
|
::
|
|
|
|
./stack.sh
|
|
|
|
A stream of activity ensues. When complete you will see a summary of
|
|
``stack.sh``'s work, including the relevant URLs, accounts and passwords
|
|
to poke at your shiny new OpenStack. The most recent log file is
|
|
available in ``stack.sh.log``.
|
|
|
|
Cleaning Up After DevStack
|
|
--------------------------
|
|
|
|
Shutting down OpenStack is now as simple as running the included
|
|
``unstack.sh`` script:
|
|
|
|
::
|
|
|
|
./unstack.sh
|
|
|
|
A more aggressive cleanup can be performed using ``clean.sh``. It
|
|
removes certain troublesome packages and attempts to leave the system in
|
|
a state where changing the database or queue manager can be reliably
|
|
performed.
|
|
|
|
::
|
|
|
|
./clean.sh
|
|
|
|
Sometimes running instances are not cleaned up. DevStack attempts to do
|
|
this when it runs but there are times it needs to still be done by hand:
|
|
|
|
::
|
|
|
|
sudo rm -rf /etc/libvirt/qemu/inst*
|
|
sudo virsh list | grep inst | awk '{print $1}' | xargs -n1 virsh destroy
|
|
|
|
Options pimp your stack
|
|
=======================
|
|
|
|
Additional Users
|
|
----------------
|
|
|
|
DevStack creates two OpenStack users (``admin`` and ``demo``) and two
|
|
projects (also ``admin`` and ``demo``). ``admin`` is exactly what it
|
|
sounds like, a privileged administrative account that is a member of
|
|
both the ``admin`` and ``demo`` projects. ``demo`` is a normal user
|
|
account that is only a member of the ``demo`` project. Creating
|
|
additional OpenStack users can be done through the dashboard, sometimes
|
|
it is easier to do them in bulk from a script, especially since they get
|
|
blown away every time ``stack.sh`` runs. The following steps are ripe
|
|
for scripting:
|
|
|
|
::
|
|
|
|
# Get admin creds
|
|
. openrc admin admin
|
|
|
|
# List existing projects
|
|
openstack project list
|
|
|
|
# List existing users
|
|
openstack user list
|
|
|
|
# Add a user and project
|
|
NAME=bob
|
|
PASSWORD=BigSecrete
|
|
PROJECT=$NAME
|
|
openstack project create $PROJECT
|
|
openstack user create $NAME --password=$PASSWORD --project $PROJECT
|
|
openstack role add Member --user $NAME --project $PROJECT
|
|
# The Member role is created by stack.sh
|
|
# openstack role list
|
|
|
|
Swift
|
|
-----
|
|
|
|
Swift, OpenStack Object Storage, requires a significant amount of resources
|
|
and is disabled by default in DevStack. The support in DevStack is geared
|
|
toward a minimal installation but can be used for testing. To implement a
|
|
true multi-node test of swift, additional steps will be required. Enabling it is as
|
|
simple as enabling the ``swift`` service in ``local.conf``:
|
|
|
|
::
|
|
|
|
enable_service s-proxy s-object s-container s-account
|
|
|
|
Swift, OpenStack Object Storage, will put its data files in ``SWIFT_DATA_DIR`` (default
|
|
``/opt/stack/data/swift``). The size of the data 'partition' created
|
|
(really a loop-mounted file) is set by ``SWIFT_LOOPBACK_DISK_SIZE``. The
|
|
Swift config files are located in ``SWIFT_CONF_DIR`` (default
|
|
``/etc/swift``). All of these settings can be overridden in (wait for
|
|
it...) ``local.conf``.
|
|
|
|
Volumes
|
|
-------
|
|
|
|
DevStack will automatically use an existing LVM volume group named
|
|
``stack-volumes`` to store cloud-created volumes. If ``stack-volumes``
|
|
doesn't exist, DevStack will set up a 10Gb loop-mounted file to contain
|
|
it. This obviously limits the number and size of volumes that can be
|
|
created inside OpenStack. The size can be overridden by setting
|
|
``VOLUME_BACKING_FILE_SIZE`` in ``local.conf``.
|
|
|
|
``stack-volumes`` can be pre-created on any physical volume supported by
|
|
Linux's LVM. The name of the volume group can be changed by setting
|
|
``VOLUME_GROUP`` in ``localrc``. ``stack.sh`` deletes all logical
|
|
volumes in ``VOLUME_GROUP`` that begin with ``VOLUME_NAME_PREFIX`` as
|
|
part of cleaning up from previous runs. It is recommended to not use the
|
|
root volume group as ``VOLUME_GROUP``.
|
|
|
|
The details of creating the volume group depends on the server hardware
|
|
involved but looks something like this:
|
|
|
|
::
|
|
|
|
pvcreate /dev/sdc
|
|
vgcreate stack-volumes /dev/sdc
|
|
|
|
Syslog
|
|
------
|
|
|
|
DevStack is capable of using ``rsyslog`` to aggregate logging across the
|
|
cluster. It is off by default; to turn it on set ``SYSLOG=True`` in
|
|
``local.conf``. ``SYSLOG_HOST`` defaults to ``HOST_IP``; on the compute
|
|
nodes it must be set to the IP of the cluster controller to send syslog
|
|
output there. In the example above, add this to the compute node
|
|
``local.conf``:
|
|
|
|
::
|
|
|
|
SYSLOG_HOST=192.168.42.11
|
|
|
|
Using Alternate Repositories/Branches
|
|
-------------------------------------
|
|
|
|
The git repositories for all of the OpenStack services are defined in
|
|
``stackrc``. Since this file is a part of the DevStack package changes
|
|
to it will probably be overwritten as updates are applied. Every setting
|
|
in ``stackrc`` can be redefined in ``local.conf``.
|
|
|
|
To change the repository or branch that a particular OpenStack service
|
|
is created from, simply change the value of ``*_REPO`` or ``*_BRANCH``
|
|
corresponding to that service.
|
|
|
|
After making changes to the repository or branch, if ``RECLONE`` is not
|
|
set in ``localrc`` it may be necessary to remove the corresponding
|
|
directory from ``/opt/stack`` to force git to re-clone the repository.
|
|
|
|
For example, to pull nova, OpenStack Compute, from a proposed release candidate
|
|
in the primary nova repository:
|
|
|
|
::
|
|
|
|
NOVA_BRANCH=rc-proposed
|
|
|
|
To pull glance, OpenStack Image service, from an experimental fork:
|
|
|
|
::
|
|
|
|
GLANCE_BRANCH=try-something-big
|
|
GLANCE_REPO=https://github.com/mcuser/glance.git
|
|
|
|
Notes stuff you might need to know
|
|
==================================
|
|
|
|
Reset the Bridge
|
|
----------------
|
|
|
|
How to reset the bridge configuration:
|
|
|
|
::
|
|
|
|
sudo brctl delif br100 eth0.926
|
|
sudo ip link set dev br100 down
|
|
sudo brctl delbr br100
|
|
|
|
Set MySQL Password
|
|
------------------
|
|
|
|
If you forgot to set the root password you can do this:
|
|
|
|
::
|
|
|
|
mysqladmin -u root -pnova password 'supersecret'
|