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============
Salt Formula
============

Salt is a new approach to infrastructure management. Easy enough to get
running in minutes, scalable enough to manage tens of thousands of servers,
and fast enough to communicate with them in seconds.

Salt delivers a dynamic communication bus for infrastructures that can be used
for orchestration, remote execution, configuration management and much more.


Sample Metadata
===============


Salt Master
-----------

Salt master with base formulas and pillar metadata backend

.. literalinclude:: tests/pillar/master_single_pillar.sls
:language: yaml

Salt master with reclass ENC metadata backend

.. literalinclude:: tests/pillar/master_single_reclass.sls
:language: yaml

Salt master with Architect ENC metadata backend

.. code-block:: yaml

salt:
master:
enabled: true
pillar:
engine: architect
project: project-name
host: architect-api
port: 8181
username: salt
password: password

Salt master with multiple ext_pillars

.. literalinclude:: tests/pillar/master_single_extpillars.sls
:language: yaml

Salt master with API

.. literalinclude:: tests/pillar/master_api.sls
:language: yaml

Salt master with defined user ACLs

.. literalinclude:: tests/pillar/master_acl.sls
:language: yaml

Salt master with preset minions

.. code-block:: yaml

salt:
master:
enabled: true
minions:
- name: 'node1.system.location.domain.com'

Salt master with pip based installation (optional)

.. code-block:: yaml

salt:
master:
enabled: true
...
source:
engine: pip
version: 2016.3.0rc2

Install formula through system package management

.. code-block:: yaml

salt:
master:
enabled: true
...
environment:
prd:
keystone:
source: pkg
name: salt-formula-keystone
nova:
source: pkg
name: salt-formula-keystone
version: 0.1+0~20160818133412.24~1.gbp6e1ebb
postresql:
source: pkg
name: salt-formula-postgresql
version: purged

Formula keystone is installed latest version and the formulas without version are installed in one call to aptpkg module.
If the version attribute is present sls iterates over formulas and take action to install specific version or remove it.
The version attribute may have these values ``[latest|purged|removed|<VERSION>]``.

Clone master branch of keystone formula as local feature branch

.. code-block:: yaml

salt:
master:
enabled: true
...
environment:
dev:
formula:
keystone:
source: git
address: git@github.com:openstack/salt-formula-keystone.git
revision: master
branch: feature

Salt master with specified formula refs (for example for Gerrit review)

.. code-block:: yaml

salt:
master:
enabled: true
...
environment:
dev:
formula:
keystone:
source: git
address: https://git.openstack.org/openstack/salt-formula-keystone
revision: refs/changes/56/123456/1

Salt master with logging handlers

.. code-block:: yaml

salt:
master:
enabled: true
handler:
handler01:
engine: udp
bind:
host: 127.0.0.1
port: 9999
minion:
handler:
handler01:
engine: udp
bind:
host: 127.0.0.1
port: 9999
handler02:
engine: zmq
bind:
host: 127.0.0.1
port: 9999

Salt engine definition for saltgraph metadata collector

.. code-block:: yaml

salt:
master:
engine:
graph_metadata:
engine: saltgraph
host: 127.0.0.1
port: 5432
user: salt
password: salt
database: salt

Salt engine definition for Architect service

.. code-block:: yaml

salt:
master:
engine:
architect:
engine: architect
project: project-name
host: architect-api
port: 8181
username: salt
password: password

Salt engine definition for sending events from docker events

.. code-block:: yaml

salt:
master:
engine:
docker_events:
docker_url: unix://var/run/docker.sock

Salt master peer setup for remote certificate signing

.. code-block:: yaml

salt:
master:
peer:
".*":
- x509.sign_remote_certificate


Salt master backup configuration

.. code-block:: yaml

salt:
master:
backup: true
initial_data:
engine: backupninja
home_dir: remote-backup-home-dir
source: backup-node-host
host: original-salt-master-id

Configure verbosity of state output (used for `salt` command)

.. code-block:: yaml

salt:
master:
state_output: changes

Pass pillar render error to minion log

.. note:: When set to `False` this option is great for debuging.
However it is not recomended for any production environment as it may contain
templating data as passwords, etc... , that minion should not expose.

.. code-block:: yaml

salt:
master:
pillar_safe_render_error: False


Event/Reactor Systems
~~~~~~~~~~~~~~~~~~~~~

Salt synchronise node pillar and modules after start

.. code-block:: yaml

salt:
master:
reactor:
salt/minion/*/start:
- salt://salt/reactor/node_start.sls

Trigger basic node install

.. code-block:: yaml

salt:
master:
reactor:
salt/minion/install:
- salt://salt/reactor/node_install.sls

Sample event to trigger the node installation

.. code-block:: bash

salt-call event.send 'salt/minion/install'

Run any defined orchestration pipeline

.. code-block:: yaml

salt:
master:
reactor:
salt/orchestrate/start:
- salt://salt/reactor/orchestrate_start.sls

Event to trigger the orchestration pipeline

.. code-block:: bash

salt-call event.send 'salt/orchestrate/start' "{'orchestrate': 'salt/orchestrate/infra_install.sls'}"

Synchronise modules and pillars on minion start.

.. code-block:: yaml

salt:
master:
reactor:
'salt/minion/*/start':
- salt://salt/reactor/minion_start.sls

Add and/or remove the minion key

.. code-block:: yaml

salt:
master:
reactor:
salt/key/create:
- salt://salt/reactor/key_create.sls
salt/key/remove:
- salt://salt/reactor/key_remove.sls

Event to trigger the key creation

.. code-block:: bash

salt-call event.send 'salt/key/create' \
> "{'node_id': 'id-of-minion', 'node_host': '172.16.10.100', 'orch_post_create': 'kubernetes.orchestrate.compute_install', 'post_create_pillar': {'node_name': 'id-of-minion'}}"

.. note::

You can add pass additional `orch_pre_create`, `orch_post_create`,
`orch_pre_remove` or `orch_post_remove` parameters to the event to call
extra orchestrate files. This can be useful for example for
registering/unregistering nodes from the monitoring alarms or dashboards.

The key creation event needs to be run from other machine than the one
being registered.

Event to trigger the key removal

.. code-block:: bash

salt-call event.send 'salt/key/remove'


Jinja options
-------------

Use following options to update default jinja renderer options. Salt recognize Jinja options for templates and for sls files.

For full list of options check jinja documentation: http://jinja.pocoo.org/docs/api/#high-level-api.

.. code-block:: yaml


salt:
renderer:
# for templates
jinja: &jina_env
# Default Jinja environment options
block_start_string: '{%'
block_end_string: '%}'
variable_start_string: '{{'
variable_end_string: '}}'
comment_start_string: '{#'
comment_end_string: '#}'
keep_trailing_newline: False
newline_sequence: '\n'

# Next two are enabled by default in Salt
trim_blocks: True
lstrip_blocks: True

# Next two are not enabled by default in Salt
# but worth to consider to enable in future for salt-formulas
line_statement_prefix: '%'
line_comment_prefix: '##'

# for .sls state files
jinja_sls: *jinja_env



With the line_statement/comment* _prefix options enabled following code statements are valid:

.. code-block:: yaml
%- set myvar = 'one'

## You can mix even with '{%'
{%- set myvar = 'two' %} ## comment
%- set mylist = ['one', 'two', 'three'] ## comment

## comment
%- for item in mylist: ## comment
{{- item }}
%- endfor


Encrypted pillars
~~~~~~~~~~~~~~~~~

Note: NACL + below configuration will be available in Salt > 2017.7.

External resources:

- Tutorial to configure salt + reclass ext_pillar and nacl: http://apealive.net/post/2017-09-salt-nacl-ext-pillar/
- Saltstack documentation: https://docs.saltstack.com/en/latest/ref/modules/all/salt.modules.nacl.html

Configure salt NACL module:

.. code-block:: shell

pip install --upgrade libnacl===1.5.2
salt-call --local nacl.keygen /etc/salt/pki/master/nacl

local:
saved sk_file:/etc/salt/pki/master/nacl pk_file: /etc/salt/pki/master/nacl.pub


.. code-block:: yaml

salt:
master:
pillar:
reclass: *reclass
nacl:
index: 99
nacl:
box_type: sealedbox
sk_file: /etc/salt/pki/master/nacl
pk_file: /etc/salt/pki/master/nacl.pub
#sk: None
#pk: None

NACL encrypt secrets:

salt-call --local nacl.enc 'my_secret_value' pk_file=/etc/salt/pki/master/nacl.pub
hXTkJpC1hcKMS7yZVGESutWrkvzusXfETXkacSklIxYjfWDlMJmR37MlmthdIgjXpg4f2AlBKb8tc9Woma7q
# or
salt-run nacl.enc 'myotherpass'
ADDFD0Rav6p6+63sojl7Htfrncp5rrDVyeE4BSPO7ipq8fZuLDIVAzQLf4PCbDqi+Fau5KD3/J/E+Pw=


NACL encrypted values on pillar:

Use Boxed syntax `NACL[CryptedValue=]` to encode value on pillar:

.. code-block:: yaml

my_pillar:
my_nacl:
key0: unencrypted_value
key1: NACL[hXTkJpC1hcKMS7yZVGESutWrkvzusXfETXkacSklIxYjfWDlMJmR37MlmthdIgjXpg4f2AlBKb8tc9Woma7q]

NACL large files:

.. code-block:: shell
salt-call nacl.enc_file /tmp/cert.crt out=/srv/salt/env/dev/cert.nacl
# or more advanced
cert=$(cat /tmp/cert.crt)
salt-call --out=newline_values_only nacl.enc_pub data="$cert" > /srv/salt/env/dev/cert.nacl


NACL within template/native pillars:

pillarexample:
user: root
password1: {{salt.nacl.dec('DRB7Q6/X5gGSRCTpZyxS6hlbWj0llUA+uaVyvou3vJ4=')|json}}
cert_key: {{salt.nacl.dec_file('/srv/salt/env/dev/certs/example.com/cert.nacl')|json}}
cert_key2: {{salt.nacl.dec_file('salt:///certs/example.com/cert2.nacl')|json}}


Salt Syndic
-----------

The master of masters

.. code-block:: yaml

salt:
master:
enabled: true
order_masters: True

Lower syndicated master

.. code-block:: yaml

salt:
syndic:
enabled: true
master:
host: master-of-master-host
timeout: 5

Syndicated master with multiple master of masters

.. code-block:: yaml

salt:
syndic:
enabled: true
masters:
- host: master-of-master-host1
- host: master-of-master-host2
timeout: 5


Salt Minion
-----------

Simplest Salt minion setup with central configuration node

.. code-block:: yaml

.. literalinclude:: tests/pillar/minion_master.sls
:language: yaml

Multi-master Salt minion setup

.. literalinclude:: tests/pillar/minion_multi_master.sls
:language: yaml

Salt minion with salt mine options

.. literalinclude:: tests/pillar/minion_mine.sls
:language: yaml

Salt minion with graphing dependencies

.. literalinclude:: tests/pillar/minion_graph.sls
:language: yaml

Salt minion behind HTTP proxy

.. code-block:: yaml

salt:
minion:
proxy:
host: 127.0.0.1
port: 3128

Salt minion to specify non-default HTTP backend. The default tornado backend
does not respect HTTP proxy settings set as environment variables. This is
useful for cases where you need to set no_proxy lists.

.. code-block:: yaml

salt:
minion:
backend: urllib2


Salt minion with PKI certificate authority (CA)

.. literalinclude:: tests/pillar/minion_pki_ca.sls
:language: yaml

Salt minion using PKI certificate

.. literalinclude:: tests/pillar/minion_pki_cert.sls
:language: yaml

Salt minion trust CA certificates issued by salt CA on a specific host (ie: salt-master node)

.. code-block:: yaml

salt:
minion:
trusted_ca_minions:
- cfg01


Salt Minion Proxy
~~~~~~~~~~~~~~~~~

Salt proxy pillar

.. code-block:: yaml

salt:
minion:
proxy_minion:
master: localhost
device:
vsrx01.mydomain.local:
enabled: true
engine: napalm
csr1000v.mydomain.local:
enabled: true
engine: napalm

.. note:: This is pillar of the the real salt-minion


Proxy pillar for IOS device

.. code-block:: yaml

proxy:
proxytype: napalm
driver: ios
host: csr1000v.mydomain.local
username: root
passwd: r00tme

.. note:: This is pillar of the node thats not able to run salt-minion itself


Proxy pillar for JunOS device

.. code-block:: yaml

proxy:
proxytype: napalm
driver: junos
host: vsrx01.mydomain.local
username: root
passwd: r00tme
optional_args:
config_format: set

.. note:: This is pillar of the node thats not able to run salt-minion itself


Salt SSH
~~~~~~~~

Salt SSH with sudoer using key

.. literalinclude:: tests/pillar/master_ssh_minion_key.sls
:language: yaml

Salt SSH with sudoer using password

.. literalinclude:: tests/pillar/master_ssh_minion_password.sls
:language: yaml

Salt SSH with root using password

.. literalinclude:: tests/pillar/master_ssh_minion_root.sls
:language: yaml

Salt control (cloud/kvm/docker)
-------------------------------

Salt cloud with local OpenStack provider

.. literalinclude:: tests/pillar/control_cloud_openstack.sls
:language: yaml

Salt cloud with Digital Ocean provider

.. literalinclude:: tests/pillar/control_cloud_digitalocean.sls
:language: yaml

Salt virt with KVM cluster

.. literalinclude:: tests/pillar/control_virt.sls
:language: yaml

salt virt with custom destination for image file

.. literalinclude:: tests/pillar/control_virt_custom.sls
:language: yaml


Usage
=====

Working with salt-cloud

.. code-block:: bash

salt-cloud -m /path/to/map --assume-yes

Debug LIBCLOUD for salt-cloud connection

.. code-block:: bash

export LIBCLOUD_DEBUG=/dev/stderr; salt-cloud --list-sizes provider_name --log-level all


References
==========

* http://salt.readthedocs.org/en/latest/
* https://github.com/DanielBryan/salt-state-graph
* http://karlgrz.com/testing-salt-states-rapidly-with-docker/
* https://mywushublog.com/2013/03/configuration-management-with-salt-stack/
* http://russell.ballestrini.net/replace-the-nagios-scheduler-and-nrpe-with-salt-stack/
* https://github.com/saltstack-formulas/salt-formula
* http://docs.saltstack.com/en/latest/topics/tutorials/multimaster.html


salt-cloud
----------

* http://www.blog.sandro-mathys.ch/2013/07/setting-user-password-when-launching.html
* http://cloudinit.readthedocs.org/en/latest/topics/examples.html
* http://salt-cloud.readthedocs.org/en/latest/topics/install/index.html
* http://docs.saltstack.com/topics/cloud/digitalocean.html
* http://salt-cloud.readthedocs.org/en/latest/topics/rackspace.html
* http://salt-cloud.readthedocs.org/en/latest/topics/map.html
* http://docs.saltstack.com/en/latest/topics/tutorials/multimaster.html


Documentation and Bugs
======================

To learn how to install and update salt-formulas, consult the documentation
available online at:

http://salt-formulas.readthedocs.io/

In the unfortunate event that bugs are discovered, they should be reported to
the appropriate issue tracker. Use Github issue tracker for specific salt
formula:

https://github.com/salt-formulas/salt-formula-salt/issues

For feature requests, bug reports or blueprints affecting entire ecosystem,
use Launchpad salt-formulas project:

https://launchpad.net/salt-formulas

You can also join salt-formulas-users team and subscribe to mailing list:

https://launchpad.net/~salt-formulas-users

Developers wishing to work on the salt-formulas projects should always base
their work on master branch and submit pull request against specific formula.

https://github.com/salt-formulas/salt-formula-salt

Any questions or feedback is always welcome so feel free to join our IRC
channel:

#salt-formulas @ irc.freenode.net