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A Client library for the Consul

Project description

Consulate is a Python client library and set of application for the Consul service discovery and configuration system.

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Installation

Consulate is available via via pypi and can be installed with easy_install or pip:

pip install consulate

Command Line Utilities

Consulate comes with two command line utilities that make working with Consul easier from a management perspective. The consulate application provides a cli wrapper for common tasks performed.

The passport application has been moved to a stand-alone application and is available at https://github.com/gmr/passport.

consulate

The consulate application provides a CLI interface for registering a service, backing up and restoring the contents of the KV database, and actions for getting, setting, and deleting keys from the KV database.

usage: consulate [-h] [--api-host API_HOST] [--api-port API_PORT]
                 [--datacenter DATACENTER]
                 {register,kv} ...

optional arguments:
  -h, --help            show this help message and exit
  --api-host API_HOST   The consul host to connect on
  --api-port API_PORT   The consul API port to connect to
  --datacenter DATACENTER
                        The datacenter to specify for the connection

Commands:
  {register,kv}
    register            Register a service for this node
    kv                  Key/Value Database Utilities

Service Registration Help:

usage: consulate register [-h] [-s SERVICE_ID] [-t TAGS]
                          {check,no-check,ttl} ... name port

positional arguments:
  name                  The service name
  port                  The port the service runs on

optional arguments:
  -h, --help            show this help message and exit
  -s SERVICE_ID, --service-id SERVICE_ID
                        Specify a service ID
  -t TAGS, --tags TAGS  Specify a comma delimited list of tags

Service Check Options:
  {check,no-check,ttl}
    check               Define an external script-based check
    no-check            Do not enable service monitoring
    ttl                 Define a duration based TTL check

KV Database Utilities Help:

usage: consulate kv [-h] {backup,restore,ls,mkdir,get,set,rm,del} ...

optional arguments:
  -h, --help            show this help message and exit

Key/Value Database Utilities:
  {backup,restore,ls,mkdir,get,set,rm,del}
    backup              Backup to stdout or a JSON file
    restore             Restore from stdin or a JSON file
    ls                  List all of the keys
    mkdir               Create a folder
    get                 Get a key from the database
    set                 Set a key in the database
    rm                  Remove a key from the database
    del                 Deprecated method to remove a key

API Usage Examples

The following examples highlight the usage of Consulate and does not document the scope of the full Consulate API.

Using Consulate with the Consul kv database:

consul = consulate.Consul()

# Set the key named release_flag to True
consul.kv['release_flag'] = True

# Get the value for the release_flag, if not set, raises AttributeError
try:
    should_release_feature = consul.kv['release_flag']
except AttributeError:
    should_release_feature = False

# Delete the release_flag key
del consul.kv['release_flag']

# Find all keys that start with "fl"
consul.kv.find('fl')

# Find all keys that start with "feature_flag" terminated by "/" separator
consul.kv.find('feature_flag', separator='/')

# Check to see if a key called "foo" is set
if "foo" in consul.kv:
    print 'Already Set'

# Return all of the items in the key/value store
consul.kv.items()

Working with the Consulate.agent API:

consul = consulate.Consul()

# Get all of the service checks for the local agent
checks = consul.agent.checks()

# Get all of the services registered with the local agent
services = consul.agent.services()

# Add a service to the local agent
consul.agent.service.register('redis',
                               port=6379,
                               tags=['master'],
                               ttl='10s')

Fetching health information from Consul:

consul = consulate.Session()

# Get the health of a individual node
health = consul.health.node('my-node')

# Get all checks that are critical
checks = consul.heath.state('critical')

For more examples, check out the Consulate documentation.

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