mirror of
https://github.com/valitydev/salt.git
synced 2024-11-07 08:58:59 +00:00
65 lines
2.3 KiB
ReStructuredText
65 lines
2.3 KiB
ReStructuredText
==============================================
|
|
Boostrapping Salt on Linux EC2 with Cloud-Init
|
|
==============================================
|
|
|
|
`Salt <http://saltstack.org>`_ is a great tool for remote execution and
|
|
configuration management, however you will still need to bootstrap the
|
|
daemon when spinning up a new node. One option is to create and save a
|
|
custom AMI, but this creates another resource to maintain and document.
|
|
|
|
A better method for Linux machines uses Canonical's `CloudInit
|
|
<https://help.ubuntu.com/community/CloudInit>`_ to run a bootstrap script
|
|
during an EC2 Instance initialization. Cloud-init takes the ``user_data``
|
|
string passed into a new AWS instance and runs it in a manner similar to
|
|
rc.local. The bootstrap script needs to:
|
|
|
|
#. Install `Salt`_ with dependencies
|
|
#. Point the minion to the master
|
|
|
|
Here is a sample script::
|
|
|
|
#!/bin/bash
|
|
|
|
# Install saltstack
|
|
add-apt-repository ppa:saltstack/salt -y
|
|
apt-get update -y
|
|
apt-get install salt -y
|
|
apt-get upgrade -y
|
|
|
|
# Set salt master location and start minion
|
|
cp /etc/salt/minion.template /etc/salt/minion
|
|
sed -i '' -e 's/#master: salt/master: [salt_master_fqdn]' /etc/salt/minion
|
|
salt-minion -d
|
|
|
|
First the script adds the saltstack ppa and installs the package. Then
|
|
we copy over the minion config template and tell it where to find the
|
|
master. You will have to replace ``[salt_master_fqdn]`` with something
|
|
that resolves to your salt master.
|
|
|
|
Used With Boto
|
|
--------------
|
|
|
|
`Boto <https://github.com/boto/boto>`_ will accept a string for user data
|
|
which can be used to pass our bootstrap script. If the script is saved to
|
|
a file, you can read it into a string::
|
|
|
|
import boto
|
|
|
|
user_data = open('salt_bootstrap.sh')
|
|
|
|
conn = boto.connect_ec2(<AWS_ACCESS_ID>, <AWS_SECRET_KEY>)
|
|
|
|
reservation = conn.run_instances(image_id=<ami_id>,
|
|
key_name=<key_name>,
|
|
user_data=user_data.read())
|
|
|
|
|
|
Additional Notes
|
|
-------------------
|
|
|
|
Sometime in the future the ppa will include and install an upstart file. In the meantime, you can use the bootstrap to `build one <https://gist.github.com/1617054>`_.
|
|
|
|
It may also be useful to set the node's role during this phase. One option
|
|
would be saving the node's role to a file and then using a custom grain
|
|
to select it.
|