Merge pull request #2 from gnuoy/feature/add-common-code
Add common code [gnuoy, r=ajkavanagh]
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commit
2a457c1c78
65
common.py
65
common.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 ipaddress
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from six import string_types
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@ -511,3 +512,67 @@ 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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"""Class for managing init resource
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:param service_name: string - Name of service
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:param init_service_name: string - Name service uses in init system
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:returns: None
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"""
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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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""""Configure new init system service resource in crm
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:param crm: CRM() instance - Config object for Pacemaker resources
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:returns: None
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"""
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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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"""Class for managing VIP resource
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:param service_name: string - Name of service
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:param vip: string - Virtual IP to be managed
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:param nic: string - Network interface to bind vip to
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:param cidr: string - Netmask for vip
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:returns: None
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"""
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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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"""Configure new vip resource in crm
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:param crm: CRM() instance - Config object for Pacemaker resources
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:returns: None
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"""
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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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55
requires.py
55
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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@ -59,7 +60,61 @@ class HAClusterRequires(RelationBase):
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hacluster.manage_resources(crm)
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:param crm: CRM() instance - Config object for Pacemaker resources
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:returns: None
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"""
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relation_data = {k: v for k, v in crm.items() if v}
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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 iface: string - Network interface to bind to
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:param mcastport: int - Multicast port corosync should use for cluster
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management traffic
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"""
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if mcastport is None:
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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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:param name: string - Name of service
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:param vip: string - Virtual IP to be managed
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:param iface: string - Network interface to bind vip to
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:param netmask: string - Netmask for vip
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:returns: None
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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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:param name: string - Name of service
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:param service: string - Name service uses in init system
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:returns: None
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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(name, service,))
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self.set_local(resources=resources)
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