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import socket
from ops.framework import Object, StoredState
class ProxyCluster(Object):
state = StoredState()
def __init__(self, charm, relation_name):
super().__init__(charm, relation_name)
self._relation_name = relation_name
self._relation = self.framework.model.get_relation(self._relation_name)
self.framework.observe(charm.on.ssh_keys_initialized, self.on_ssh_keys_initialized)
self.state.set_default(ssh_public_key=None)
self.state.set_default(ssh_private_key=None)
def on_ssh_keys_initialized(self, event):
if not self.framework.model.unit.is_leader():
raise RuntimeError("The initial unit of a cluster must also be a leader.")
self.state.ssh_public_key = event.ssh_public_key
self.state.ssh_private_key = event.ssh_private_key
if not self.is_joined:
event.defer()
return
self._relation.data[self.model.app][
"ssh_public_key"
] = self.state.ssh_public_key
self._relation.data[self.model.app][
"ssh_private_key"
] = self.state.ssh_private_key
@property
def is_joined(self):
return self._relation is not None
@property
def ssh_public_key(self):
if self.is_joined:
return self._relation.data[self.model.app].get("ssh_public_key")
@property
def ssh_private_key(self):
if self.is_joined:
return self._relation.data[self.model.app].get("ssh_private_key")
@property
def is_cluster_initialized(self):
return (
True
if self.is_joined
and self._relation.data[self.model.app].get("ssh_public_key")
and self._relation.data[self.model.app].get("ssh_private_key")
else False
)