Add more common code
Add methods for setting up hacluster resources in interface to allow external code to cleanly call <interface>.add_<resource> rather than having to import specific methods from common.py
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41
common.py
41
common.py
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@ -11,9 +11,9 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import ipaddress
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from six import string_types
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class CRM(dict):
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"""
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Configuration object for Pacemaker resources for the HACluster
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@ -511,3 +511,42 @@ class ResourceDescriptor(object):
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configure the specific details under the covers.
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"""
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pass
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class InitService(ResourceDescriptor):
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def __init__(self, service_name, init_service_name):
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self.service_name = service_name
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self.init_service_name = init_service_name
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def configure_resource(self, crm):
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res_key = 'res_{}_{}'.format(
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self.service_name.replace('-', '_'),
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self.init_service_name.replace('-', '_'))
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clone_key = 'cl_{}'.format(res_key)
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res_type = 'lsb:{}'.format(self.init_service_name)
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crm.primitive(res_key, res_type, params='op monitor interval="5s"')
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crm.init_services(self.init_service_name)
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crm.clone(clone_key, res_key)
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class VirtualIP(ResourceDescriptor):
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def __init__(self, service_name, vip, nic=None, cidr=None):
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self.service_name = service_name
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self.vip = vip
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self.nic = nic
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self.cidr = cidr
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def configure_resource(self, crm):
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vip_key = 'res_{}_{}_vip'.format(self.service_name, self.nic)
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ipaddr = ipaddress.ip_address(self.vip)
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if isinstance(ipaddr, ipaddress.IPv4Address):
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res_type = 'ocf:heartbeat:IPaddr2'
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res_params = 'ip="{}"'.format(self.vip)
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else:
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res_type = 'ocf:heartbeat:IPv6addr'
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res_params = 'ipv6addr="{}"'.format(self.vip)
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if self.nic:
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res_params = '{} nic="{}"'.format(res_params, self.nic)
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if self.cidr:
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res_params = '{} cidr_netmask="{}"'.format(res_params, self.cidr)
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crm.primitive(vip_key, res_type, params=res_params)
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47
requires.py
47
requires.py
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@ -11,6 +11,7 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import relations.hacluster.common
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from charms.reactive import hook
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from charms.reactive import RelationBase
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from charms.reactive import scopes
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@ -61,5 +62,51 @@ class HAClusterRequires(RelationBase):
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"""
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relation_data = {k: v for k, v in crm.items() if v}
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print(relation_data)
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self.set_local(**relation_data)
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self.set_remote(**relation_data)
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def bind_resources(self, iface, mcastport=None):
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"""Inform the ha subordinate about each service it should manage. The
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child class specifies the services via self.ha_resources
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@param hacluster interface
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"""
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if not mcastport:
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mcastport=4440
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resources = self.get_local('resources')
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self.bind_on(iface=iface, mcastport=mcastport)
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self.manage_resources(resources)
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def add_vip(self, name, vip, iface, netmask):
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"""Add a VirtualIP object for each user specified vip to self.resources
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"""
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resource_dict = self.get_local('resources')
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if resource_dict:
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resources=relations.hacluster.common.CRM(**resource_dict)
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else:
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resources=relations.hacluster.common.CRM()
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resources.add(
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relations.hacluster.common.VirtualIP(
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name,
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vip,
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nic=iface,
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cidr=netmask,))
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self.set_local(resources=resources)
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def add_init_service(self, name, service):
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"""Add a InitService object for haproxy to self.resources
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"""
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resource_dict = self.get_local('resources')
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if resource_dict:
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resources=relations.hacluster.common.CRM(**resource_dict)
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else:
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resources=relations.hacluster.common.CRM()
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resources.add(
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relations.hacluster.common.InitService(
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name,
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service,))
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self.set_local(resources=resources)
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