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#!/usr/bin/python
# -*- coding: utf-8 -*-
# vim: expandtab:tabstop=4:shiftwidth=4
'''
Custom filters for use in openshift-ansible
'''
from ansible import errors
from operator import itemgetter
import pdb
def oo_pdb(arg):
''' This pops you into a pdb instance where arg is the data passed in
from the filter.
Ex: "{{ hostvars | oo_pdb }}"
'''
pdb.set_trace()
return arg
def oo_len(arg):
''' This returns the length of the argument
Ex: "{{ hostvars | oo_len }}"
'''
return len(arg)
def get_attr(data, attribute=None):
''' This looks up dictionary attributes of the form a.b.c and returns
the value.
Ex: data = {'a': {'b': {'c': 5}}}
attribute = "a.b.c"
returns 5
'''
if not attribute:
raise errors.AnsibleFilterError("|failed expects attribute to be set")
ptr = data
for attr in attribute.split('.'):
ptr = ptr[attr]
return ptr
def oo_flatten(data):
''' This filter plugin will flatten a list of lists
'''
if not issubclass(type(data), list):
raise errors.AnsibleFilterError("|failed expects to flatten a List")
return [item for sublist in data for item in sublist]
def oo_collect(data, attribute=None, filters=None):
''' This takes a list of dict and collects all attributes specified into a
list If filter is specified then we will include all items that match
_ALL_ of filters.
Ex: data = [ {'a':1, 'b':5, 'z': 'z'}, # True, return
{'a':2, 'z': 'z'}, # True, return
{'a':3, 'z': 'z'}, # True, return
{'a':4, 'z': 'b'}, # FAILED, obj['z'] != obj['z']
]
attribute = 'a'
filters = {'z': 'z'}
returns [1, 2, 3]
'''
if not issubclass(type(data), list):
raise errors.AnsibleFilterError("|failed expects to filter on a List")
if not attribute:
raise errors.AnsibleFilterError("|failed expects attribute to be set")
if filters is not None:
if not issubclass(type(filters), dict):
raise errors.AnsibleFilterError("|fialed expects filter to be a"
" dict")
retval = [get_attr(d, attribute) for d in data if (
all([d[key] == filters[key] for key in filters]))]
else:
retval = [get_attr(d, attribute) for d in data]
return retval
def oo_select_keys(data, keys):
''' This returns a list, which contains the value portions for the keys
Ex: data = { 'a':1, 'b':2, 'c':3 }
keys = ['a', 'c']
returns [1, 3]
'''
if not issubclass(type(data), dict):
raise errors.AnsibleFilterError("|failed expects to filter on a dict")
if not issubclass(type(keys), list):
raise errors.AnsibleFilterError("|failed expects first param is a list")
# Gather up the values for the list of keys passed in
retval = [data[key] for key in keys]
return retval
def oo_prepend_strings_in_list(data, prepend):
''' This takes a list of strings and prepends a string to each item in the
list
Ex: data = ['cart', 'tree']
prepend = 'apple-'
returns ['apple-cart', 'apple-tree']
'''
if not issubclass(type(data), list):
raise errors.AnsibleFilterError("|failed expects first param is a list")
if not all(isinstance(x, basestring) for x in data):
raise errors.AnsibleFilterError("|failed expects first param is a list"
" of strings")
retval = [prepend + s for s in data]
return retval
def oo_ami_selector(data, image_name):
''' This takes a list of amis and an image name and attempts to return
the latest ami.
'''
if not issubclass(type(data), list):
raise errors.AnsibleFilterError("|failed expects first param is a list")
if not data:
return None
else:
if image_name is None or not image_name.endswith('_*'):
ami = sorted(data, key=itemgetter('name'), reverse=True)[0]
return ami['ami_id']
else:
ami_info = [(ami, ami['name'].split('_')[-1]) for ami in data]
ami = sorted(ami_info, key=itemgetter(1), reverse=True)[0][0]
return ami['ami_id']
def oo_ec2_volume_definition(data, host_type, docker_ephemeral=False):
''' This takes a dictionary of volume definitions and returns a valid ec2
volume definition based on the host_type and the values in the
dictionary.
The dictionary should look similar to this:
{ 'master':
{ 'root':
{ 'volume_size': 10, 'device_type': 'gp2',
'iops': 500
}
},
'node':
{ 'root':
{ 'volume_size': 10, 'device_type': 'io1',
'iops': 1000
},
'docker':
{ 'volume_size': 40, 'device_type': 'gp2',
'iops': 500, 'ephemeral': 'true'
}
}
}
'''
if not issubclass(type(data), dict):
raise errors.AnsibleFilterError("|failed expects first param is a dict")
if host_type not in ['master', 'node']:
raise errors.AnsibleFilterError("|failed expects either master or node"
" host type")
root_vol = data[host_type]['root']
root_vol['device_name'] = '/dev/sda1'
root_vol['delete_on_termination'] = True
if root_vol['device_type'] != 'io1':
root_vol.pop('iops', None)
if host_type == 'node':
docker_vol = data[host_type]['docker']
docker_vol['device_name'] = '/dev/xvdb'
docker_vol['delete_on_termination'] = True
if docker_vol['device_type'] != 'io1':
docker_vol.pop('iops', None)
if docker_ephemeral:
docker_vol.pop('device_type', None)
docker_vol.pop('delete_on_termination', None)
docker_vol['ephemeral'] = 'ephemeral0'
return [root_vol, docker_vol]
return [root_vol]
# disabling pylint checks for too-few-public-methods and no-self-use since we
# need to expose a FilterModule object that has a filters method that returns
# a mapping of filter names to methods.
# pylint: disable=too-few-public-methods, no-self-use
class FilterModule(object):
''' FilterModule '''
def filters(self):
''' returns a mapping of filters to methods '''
return {
"oo_select_keys": oo_select_keys,
"oo_collect": oo_collect,
"oo_flatten": oo_flatten,
"oo_len": oo_len,
"oo_pdb": oo_pdb,
"oo_prepend_strings_in_list": oo_prepend_strings_in_list,
"oo_ami_selector": oo_ami_selector,
"oo_ec2_volume_definition": oo_ec2_volume_definition
}
|
