本文整理汇总了Python中trove.instance.models.Instance.load方法的典型用法代码示例。如果您正苦于以下问题:Python Instance.load方法的具体用法?Python Instance.load怎么用?Python Instance.load使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类trove.instance.models.Instance
的用法示例。
在下文中一共展示了Instance.load方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _grow_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _grow_cluster():
db_instances = DBInstance.find_all(cluster_id=cluster_id).all()
cluster_head = next(Instance.load(context, db_inst.id)
for db_inst in db_instances
if db_inst.id not in new_instance_ids)
if not cluster_head:
raise TroveError("Unable to determine existing Redis cluster "
"member")
(cluster_head_ip, cluster_head_port) = (
self.get_guest(cluster_head).get_node_ip())
# Wait for cluster members to get to cluster-ready status.
if not self._all_instances_ready(new_instance_ids, cluster_id):
return
LOG.debug("All members ready, proceeding for cluster setup.")
new_insts = [Instance.load(context, instance_id)
for instance_id in new_instance_ids]
new_guests = map(self.get_guest, new_insts)
# Connect nodes to the cluster head
for guest in new_guests:
guest.cluster_meet(cluster_head_ip, cluster_head_port)
for guest in new_guests:
guest.cluster_complete()
示例2: _add_shard_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _add_shard_cluster():
db_instances = DBInstance.find_all(cluster_id=cluster_id,
shard_id=shard_id).all()
instance_ids = [db_instance.id for db_instance in db_instances]
LOG.debug("instances in shard %s: %s" % (shard_id,
instance_ids))
if not self._all_instances_ready(instance_ids, cluster_id,
shard_id):
return
members = [Instance.load(context, instance_id)
for instance_id in instance_ids]
db_query_routers = DBInstance.find_all(cluster_id=cluster_id,
type='query_router',
deleted=False).all()
query_routers = [Instance.load(context, db_query_router.id)
for db_query_router in db_query_routers]
if not self._create_shard(query_routers[0], members):
return
for member in members:
self.get_guest(member).cluster_complete()
示例3: _shrink_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _shrink_cluster():
db_instances = DBInstance.find_all(cluster_id=cluster_id,
deleted=False).all()
all_instance_ids = [db_instance.id for db_instance in db_instances]
remove_instances = [Instance.load(context, instance_id)
for instance_id in instance_ids]
left_instances = [Instance.load(context, instance_id)
for instance_id
in all_instance_ids
if instance_id not in instance_ids]
remove_member_ips = [self.get_ip(instance)
for instance in remove_instances]
k = VerticaCluster.k_safety(len(left_instances))
for db_instance in db_instances:
if db_instance['type'] == 'master':
master_instance = Instance.load(context,
db_instance.id)
if self.get_ip(master_instance) in remove_member_ips:
raise RuntimeError(_("Cannot remove master instance!"))
LOG.debug(_("Marking cluster k-safety: %s") % k)
self.get_guest(master_instance).mark_design_ksafe(k)
self.get_guest(master_instance).shrink_cluster(
remove_member_ips)
break
for r in remove_instances:
Instance.delete(r)
示例4: _grow_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _grow_cluster():
new_instances = [db_instance for db_instance in self.db_instances
if db_instance.id in instance_ids]
new_members = [db_instance for db_instance in new_instances
if db_instance.type == 'member']
new_query_routers = [db_instance for db_instance in new_instances
if db_instance.type == 'query_router']
instances = []
if new_members:
shard_ids = set([db_instance.shard_id for db_instance
in new_members])
query_router_id = self._get_running_query_router_id()
if not query_router_id:
return
for shard_id in shard_ids:
LOG.debug('growing cluster by adding shard %s on query '
'router %s' % (shard_id, query_router_id))
member_ids = [db_instance.id for db_instance in new_members
if db_instance.shard_id == shard_id]
if not self._all_instances_ready(
member_ids, cluster_id, shard_id
):
return
members = [Instance.load(context, member_id)
for member_id in member_ids]
query_router = Instance.load(context, query_router_id)
if not self._create_shard(query_router, members):
return
instances.extend(members)
if new_query_routers:
query_router_ids = [db_instance.id for db_instance
in new_query_routers]
config_servers_ids = [db_instance.id for db_instance
in self.db_instances
if db_instance.type == 'config_server']
LOG.debug('growing cluster by adding query routers %s, '
'with config servers %s'
% (query_router_ids, config_servers_ids))
if not self._all_instances_ready(
query_router_ids, cluster_id
):
return
query_routers = [Instance.load(context, instance_id)
for instance_id in query_router_ids]
config_servers_ips = [
self.get_ip(Instance.load(context, config_server_id))
for config_server_id in config_servers_ids
]
if not self._add_query_routers(
query_routers, config_servers_ips,
admin_password=self.get_cluster_admin_password(context)
):
return
instances.extend(query_routers)
for instance in instances:
self.get_guest(instance).cluster_complete()
示例5: _shrink_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _shrink_cluster():
removal_instances = [Instance.load(context, instance_id)
for instance_id in removal_instance_ids]
for instance in removal_instances:
Instance.delete(instance)
# wait for instances to be deleted
def all_instances_marked_deleted():
non_deleted_instances = DBInstance.find_all(
cluster_id=cluster_id, deleted=False).all()
non_deleted_ids = [db_instance.id for db_instance
in non_deleted_instances]
return not bool(
set(removal_instance_ids).intersection(
set(non_deleted_ids))
)
try:
LOG.info(_("Deleting instances (%s)") % removal_instance_ids)
utils.poll_until(all_instances_marked_deleted,
sleep_time=2,
time_out=CONF.cluster_delete_time_out)
except PollTimeOut:
LOG.error(_("timeout for instances to be marked as deleted."))
return
db_instances = DBInstance.find_all(cluster_id=cluster_id).all()
leftover_instances = [Instance.load(context, db_inst.id)
for db_inst in db_instances
if db_inst.id not in removal_instance_ids]
leftover_cluster_ips = [self.get_ip(instance) for instance in
leftover_instances]
# Get config changes for left over instances
rnd_cluster_guest = self.get_guest(leftover_instances[0])
cluster_context = rnd_cluster_guest.get_cluster_context()
# apply the new config to all leftover instances
for instance in leftover_instances:
guest = self.get_guest(instance)
# render the conf.d/cluster.cnf configuration
cluster_configuration = self._render_cluster_config(
context,
instance,
",".join(leftover_cluster_ips),
cluster_context['cluster_name'],
cluster_context['replication_user'])
guest.write_cluster_configuration_overrides(
cluster_configuration)
示例6: _create_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_cluster():
# Fetch instances by cluster_id against instances table.
db_instances = DBInstance.find_all(cluster_id=cluster_id,
deleted=False).all()
instance_ids = [db_instance.id for db_instance in db_instances]
# Wait for cluster members to get to cluster-ready status.
if not self._all_instances_ready(instance_ids, cluster_id):
return
LOG.debug("All members ready, proceeding for cluster setup.")
instances = [Instance.load(context, instance_id) for instance_id
in instance_ids]
member_ips = [self.get_ip(instance) for instance in instances]
guests = [self.get_guest(instance) for instance in instances]
# Users to be configured for password-less SSH.
authorized_users_without_password = ['root', 'dbadmin']
# Configuring password-less SSH for cluster members.
# Strategy for setting up SSH:
# get public keys for user from member-instances in cluster,
# combine them, finally push it back to all instances,
# and member instances add them to authorized keys.
LOG.debug("Configuring password-less SSH on cluster members.")
try:
for user in authorized_users_without_password:
pub_key = [guest.get_public_keys(user) for guest in guests]
for guest in guests:
guest.authorize_public_keys(user, pub_key)
LOG.debug("Installing cluster with members: %s." % member_ips)
for db_instance in db_instances:
if db_instance['type'] == 'master':
master_instance = Instance.load(context,
db_instance.id)
self.get_guest(master_instance).install_cluster(
member_ips)
break
LOG.debug("Finalizing cluster configuration.")
for guest in guests:
guest.cluster_complete()
except Exception:
LOG.exception(_("Error creating cluster."))
self.update_statuses_on_failure(cluster_id)
示例7: _create_resources
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_resources():
# parse the ID from the Ref
instance_id = utils.get_id_from_href(instance)
# verify that the instance exists and can perform actions
from trove.instance.models import Instance
instance_model = Instance.load(context, instance_id)
instance_model.validate_can_perform_action()
cls.verify_swift_auth_token(context)
try:
db_info = DBBackup.create(name=name,
description=description,
tenant_id=context.tenant,
state=BackupState.NEW,
instance_id=instance_id,
deleted=False)
except exception.InvalidModelError as ex:
LOG.exception("Unable to create Backup record:")
raise exception.BackupCreationError(str(ex))
backup_info = {'id': db_info.id,
'name': name,
'description': description,
'instance_id': instance_id,
'backup_type': db_info.backup_type,
'checksum': db_info.checksum,
}
api.API(context).create_backup(backup_info, instance_id)
return db_info
示例8: _grow_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _grow_cluster():
# Wait for new nodes to get to cluster-ready status.
LOG.debug("Waiting for new nodes to become ready.")
if not self._all_instances_ready(new_instance_ids, cluster_id):
return
new_instances = [Instance.load(context, instance_id)
for instance_id in new_instance_ids]
add_node_info = [self.build_node_info(instance)
for instance in new_instances]
LOG.debug("All nodes ready, proceeding with cluster setup.")
cluster_node_ids = self.find_cluster_node_ids(cluster_id)
cluster_nodes = self.load_cluster_nodes(context, cluster_node_ids)
old_node_info = [node for node in cluster_nodes
if node['id'] not in new_instance_ids]
# Rebalance the cluster via one of the existing nodes.
# Clients can continue to store and retrieve information and
# do not need to be aware that a rebalance operation is taking
# place.
coordinator = old_node_info[0]
self._add_nodes(coordinator, add_node_info)
LOG.debug("Cluster grow finished successfully.")
示例9: _grow_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _grow_cluster():
# Wait for new nodes to get to cluster-ready status.
LOG.debug("Waiting for new nodes to become ready.")
if not self._all_instances_ready(new_instance_ids, cluster_id):
return
new_instances = [Instance.load(context, instance_id)
for instance_id in new_instance_ids]
added_nodes = [self.build_node_info(instance)
for instance in new_instances]
LOG.debug("All nodes ready, proceeding with cluster setup.")
cluster_node_ids = self.find_cluster_node_ids(cluster_id)
cluster_nodes = self.load_cluster_nodes(context, cluster_node_ids)
# Rebalance the cluster via one of the existing nodes.
# Clients can continue to store and retrieve information and
# do not need to be aware that a rebalance operation is taking
# place.
# The new nodes are marked active only if the rebalancing
# completes.
try:
coordinator = cluster_nodes[0]
self._add_nodes(coordinator, added_nodes)
LOG.debug("Cluster configuration finished successfully.")
except Exception:
LOG.exception(_("Error growing cluster."))
self.update_statuses_on_failure(cluster_id)
示例10: _create_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_cluster():
# fetch instances by cluster_id against instances table
db_instances = DBInstance.find_all(cluster_id=cluster_id).all()
instance_ids = [db_instance.id for db_instance in db_instances]
LOG.debug("instances in cluster %s: %s" % (cluster_id,
instance_ids))
if not self._all_instances_ready(instance_ids, cluster_id):
return
instances = [Instance.load(context, instance_id) for instance_id
in instance_ids]
# filter query routers in instances into a new list: query_routers
query_routers = [instance for instance in instances if
instance.type == 'query_router']
LOG.debug("query routers: %s" %
[instance.id for instance in query_routers])
# filter config servers in instances into new list: config_servers
config_servers = [instance for instance in instances if
instance.type == 'config_server']
LOG.debug("config servers: %s" %
[instance.id for instance in config_servers])
# filter members (non router/configsvr) into a new list: members
members = [instance for instance in instances if
instance.type == 'member']
LOG.debug("members: %s" %
[instance.id for instance in members])
# for config_server in config_servers, append ip/hostname to
# "config_server_hosts", then
# peel off the replica-set name and ip/hostname from 'x'
config_server_ips = [self.get_ip(instance)
for instance in config_servers]
LOG.debug("config server ips: %s" % config_server_ips)
LOG.debug("calling add_config_servers on query_routers")
try:
for query_router in query_routers:
(self.get_guest(query_router)
.add_config_servers(config_server_ips))
except Exception:
LOG.exception(_("error adding config servers"))
self.update_statuses_on_failure(cluster_id)
return
if not self._create_replica_set(members, cluster_id):
return
replica_set_name = "rs1"
if not self._create_shard(query_routers, replica_set_name,
members, cluster_id):
return
# call to start checking status
for instance in instances:
self.get_guest(instance).cluster_complete()
示例11: _create_resources
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_resources():
# parse the ID from the Ref
instance_id = utils.get_id_from_href(instance)
# verify that the instance exists and can perform actions
from trove.instance.models import Instance
instance_model = Instance.load(context, instance_id)
instance_model.validate_can_perform_action()
cls.validate_can_perform_action(
instance_model, 'backup_create')
cls.verify_swift_auth_token(context)
if instance_model.cluster_id is not None:
raise exception.ClusterInstanceOperationNotSupported()
ds = instance_model.datastore
ds_version = instance_model.datastore_version
parent = None
if parent_id:
# Look up the parent info or fail early if not found or if
# the user does not have access to the parent.
_parent = cls.get_by_id(context, parent_id)
parent = {
'location': _parent.location,
'checksum': _parent.checksum,
}
try:
db_info = DBBackup.create(name=name,
description=description,
tenant_id=context.tenant,
state=BackupState.NEW,
instance_id=instance_id,
parent_id=parent_id,
datastore_version_id=ds_version.id,
deleted=False)
except exception.InvalidModelError as ex:
LOG.exception(_("Unable to create backup record for "
"instance: %s"), instance_id)
raise exception.BackupCreationError(str(ex))
backup_info = {'id': db_info.id,
'name': name,
'description': description,
'instance_id': instance_id,
'backup_type': db_info.backup_type,
'checksum': db_info.checksum,
'parent': parent,
'datastore': ds.name,
'datastore_version': ds_version.name,
}
api.API(context).create_backup(backup_info, instance_id)
return db_info
示例12: shrink
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def shrink(self, instances):
"""Removes instances from a cluster."""
LOG.debug("Shrinking cluster %s." % self.id)
self.validate_cluster_available()
removal_instances = [Instance.load(self.context, inst_id) for inst_id in instances]
db_instances = DBInstance.find_all(cluster_id=self.db_info.id).all()
if len(db_instances) - len(removal_instances) < 1:
raise exception.ClusterShrinkMustNotLeaveClusterEmpty()
self.db_info.update(task_status=ClusterTasks.SHRINKING_CLUSTER)
task_api.load(self.context, self.ds_version.manager).shrink_cluster(
self.db_info.id, [instance.id for instance in removal_instances]
)
return PXCCluster(self.context, self.db_info, self.ds, self.ds_version)
示例13: _create_resources
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_resources():
# parse the ID from the Ref
instance_id = utils.get_id_from_href(instance)
# verify that the instance exists and can perform actions
from trove.instance.models import Instance
instance_model = Instance.load(context, instance_id)
instance_model.validate_can_perform_action()
cls.verify_swift_auth_token(context)
parent = None
if parent_id:
# Look up the parent info or fail early if not found or if
# the user does not have access to the parent.
_parent = cls.get_by_id(context, parent_id)
parent = {"location": _parent.location, "checksum": _parent.checksum}
try:
db_info = DBBackup.create(
name=name,
description=description,
tenant_id=context.tenant,
state=BackupState.NEW,
instance_id=instance_id,
parent_id=parent_id,
deleted=False,
)
except exception.InvalidModelError as ex:
LOG.exception("Unable to create Backup record:")
raise exception.BackupCreationError(str(ex))
backup_info = {
"id": db_info.id,
"name": name,
"description": description,
"instance_id": instance_id,
"backup_type": db_info.backup_type,
"checksum": db_info.checksum,
"parent": parent,
}
api.API(context).create_backup(backup_info, instance_id)
return db_info
示例14: _create_cluster
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def _create_cluster():
# Fetch instances by cluster_id against instances table.
db_instances = DBInstance.find_all(cluster_id=cluster_id).all()
instance_ids = [db_instance.id for db_instance in db_instances]
# Wait for cluster members to get to cluster-ready status.
if not self._all_instances_ready(instance_ids, cluster_id):
return
LOG.debug("All members ready, proceeding for cluster setup.")
instances = [Instance.load(context, instance_id) for instance_id
in instance_ids]
# Connect nodes to the first node
guests = [self.get_guest(instance) for instance in instances]
try:
cluster_head = instances[0]
cluster_head_port = '6379'
cluster_head_ip = self.get_ip(cluster_head)
for guest in guests[1:]:
guest.cluster_meet(cluster_head_ip, cluster_head_port)
num_nodes = len(instances)
total_slots = 16384
slots_per_node = total_slots / num_nodes
leftover_slots = total_slots % num_nodes
first_slot = 0
for guest in guests:
last_slot = first_slot + slots_per_node
if leftover_slots > 0:
leftover_slots -= 1
else:
last_slot -= 1
guest.cluster_addslots(first_slot, last_slot)
first_slot = last_slot + 1
for guest in guests:
guest.cluster_complete()
except Exception:
LOG.exception(_("Error creating cluster."))
self.update_statuses_on_failure(cluster_id)
示例15: load_cluster_nodes
# 需要导入模块: from trove.instance.models import Instance [as 别名]
# 或者: from trove.instance.models.Instance import load [as 别名]
def load_cluster_nodes(cls, context, node_ids):
return [cls.build_node_info(Instance.load(context, node_id))
for node_id in node_ids]