kzconfig
General kazoo configuration wrappers and helpers. Wraps the following libraries:
- python-couchdb
- kazoo-sdk
- pyrkube
- dnsimple
Customizing
Subclass kzconfig.Context. In this example, I've chosen to show how a user who wants to use the default conventions except for using a different provider for DNS.
from kzconfig import Context, meta
class MyContext(Context):
_configs = ('environment',)
_secrets = ('couchdb', 'rabbitmq', 'master-account', 'dns.coredns')
def __init__(self, domain='example.org'):
self.domain = domain
@meta.lazy_property
def dns(self):
return MyDNS(self, self.domain)
...
import CoreDNS
class MyDNS:
def __init__(self, context, domain):
self.context = context
self.domain = domain
creds = self.context.secrets['dns.coredns']
self.api = CoreDNS(
username=creds['email'],
password=creds['password']
)
Quick example of subclassing without a DNS implementation.
from kzconfig import Context, meta
class MyContext(Context):
_configs = ('environment',)
_secrets = ('couchdb', 'rabbitmq', 'master-account', 'dns.coredns')
_domain = 'example.org'
def __init__(self, domain='example.org'):
self.domain = domain
def dns(self):
raise NotImplementedUsage
Initializing a new context
from kzconfig import Context, meta
context = Context()Kubernetes
# get the pod named rabbitmq
rabbit_pod = context.kube.api.get('pod', 'rabbitmq')
# defaults to default namespace
all_pods = context.kube.api.get('pod')
# all kube-system pods
all_system_pods = context.kube.api.get('pod', namespace='kube-system')
# get first pod using label selector app=couchdb
first_couchdb_pod = context.kube.api.get_first('pod', selector=dict(app='couchdb'))for more see my pyrkube library...
CouchDB
# get the system_config database
db = context.couchdb['system_config']
doc = dict(_id='hello')
# save new document to it
db.save(doc)Kazoo
# get the master account object in kazoo
master_acct = context.kazoo.get_account(context.secrets['master-account'])DNS
context.dns.add('A', '192.168.0.1')Sup
context.sup.kz_nodes.status()CLI Commands
sup
Usage
Usage: sup [OPTIONS] MODULE FUNCTION [ARGS]...
Options:
--help Show this message and exit.
install-kubectl
Usage
Usage: install-kubectl [OPTIONS]
Options:
--help Show this message and exit.
Installs kubectl version == KUBECTL_VERSION || 1.7.8
If you override the version using environment variables, be sure to override KUBECTL_SHA256 also.
Example
sup kz_nodes status
