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:orphan:
Nodepool - OpenStack
====================
Setup
-----
Before starting on this, you need to download your `openrc`
configuration from your OpenStack cloud. Put it on your server in the
staging user's home directory. It should be called
``<username>-openrc.sh``. Once that is done, create a new keypair
that will be installed when instantiating the servers:
.. code-block:: shell
cd ~
source <username>-openrc.sh # this may prompt for password - enter it
openstack keypair create --public-key nodepool_rsa.pub nodepool
We'll use the private key later when configuring Zuul. In the same
session, configure nodepool to talk to your cloud:
.. code-block:: shell
umask 0066
sudo mkdir -p ~nodepool/.config/openstack
cat > clouds.yaml <<EOF
clouds:
mycloud:
auth:
username: $OS_USERNAME
password: $OS_PASSWORD
project_name: ${OS_PROJECT_NAME:-$OS_TENANT_NAME}
auth_url: $OS_AUTH_URL
region_name: $OS_REGION_NAME
EOF
sudo mv clouds.yaml ~nodepool/.config/openstack/
sudo chown -R nodepool.nodepool ~nodepool/.config
umask 0002
Once you've written out the file, double check all the required fields
have been filled out.
Configuration
-------------
You'll need the following information in order to create the Nodepool
configuration file:
* cloud name / region name - from clouds.yaml
* flavor-name
* image-name - from your cloud
.. code-block:: shell
sudo bash -c "cat >/etc/nodepool/nodepool.yaml <<EOF
zookeeper-servers:
- host: localhost
port: 2181
providers:
- name: myprovider # this is a nodepool identifier for this cloud provider (cloud+region combo)
region-name: regionOne # this needs to match the region name in clouds.yaml but is only needed if there is more than one region
cloud: mycloud # This needs to match the name in clouds.yaml
cloud-images:
- name: centos-7 # Defines a cloud-image for nodepool
image-name: CentOS-7-x86_64-GenericCloud-1706 # name of image from cloud
username: centos # The user Zuul should log in as
pools:
- name: main
max-servers: 4 # nodepool will never create more than this many servers
labels:
- name: centos-7-small # defines label that will be used to get one of these in a job
flavor-name: 'm1.small' # name of flavor from cloud
cloud-image: centos-7 # matches name from cloud-images
key-name: nodepool # name of the keypair to use for authentication
labels:
- name: centos-7-small # defines label that will be used in jobs
min-ready: 2 # nodepool will always keep this many booted and ready to go
EOF"
.. warning::
`min-ready:2` may incur costs in your cloud provider. This will result in
two instances always running, even when idle.
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