Account

Account Server

class swift.account.server.AccountController(conf)

Bases: object

WSGI controller for the account server.

DELETE(req)

Handle HTTP DELETE request.

GET(req)

Handle HTTP GET request.

HEAD(req)

Handle HTTP HEAD request.

POST(req)

Handle HTTP POST request. Handler for RPC calls for account replication.

PUT(req)

Handle HTTP PUT request.

Account Auditor

class swift.account.auditor.AccountAuditor(server_conf, auditor_conf)

Bases: object

Audit accounts.

account_audit(device)

Audit any accounts found on the device.

Parameters:

• device – device to audit

audit_forever()

Run the account audit until stopped.

audit_once()

Run the account audit once.

get_container_ring()

Get the container ring. Load the ring if neccesary.

Returns:container ring

exception swift.account.auditor.AuditException

Bases: exceptions.Exception

swift.account.auditor.random()

random() -> x in the interval [0, 1).

Account Reaper

class swift.account.reaper.AccountReaper(server_conf, reaper_conf)

Bases: object

Removes data from status=DELETED accounts. These are accounts that have been asked to be removed by the reseller via services remove_storage_account XMLRPC call.

The account is not deleted immediately by the services call, but instead the account is simply marked for deletion by setting the status column in the account_stat table of the account database. This account reaper scans for such accounts and removes the data in the background. The background deletion process will occur on the primary account server for the account.

Parameters:

• server_conf – The [account-server] dictionary of the account server configuration file
• reaper_conf – The [account-reaper] dictionary of the account server configuration file

See the etc/account-server.conf-sample for information on the possible configuration parameters.

get_account_ring()

The account swift.common.ring.Ring for the cluster.

get_container_ring()

The container swift.common.ring.Ring for the cluster.

get_object_ring()

The object swift.common.ring.Ring for the cluster.

reap_account(broker, partition, nodes)

Called once per pass for each account this server is the primary for and attempts to delete the data for the given account. The reaper will only delete one account at any given time. It will call reap_container() up to sqrt(self.concurrency) times concurrently while reaping the account.

If there is any exception while deleting a single container, the process will continue for any other containers and the failed containers will be tried again the next time this function is called with the same parameters.

If there is any exception while listing the containers for deletion, the process will stop (but will obviously be tried again the next time this function is called with the same parameters). This isn’t likely since the listing comes from the local database.

After the process completes (successfully or not) statistics about what was accomplished will be logged.

This function returns nothing and should raise no exception but only update various self.stats_* values for what occurs.

Parameters:

• broker – The AccountBroker for the account to delete.
• partition – The partition in the account ring the account is on.
• nodes – The primary node dicts for the account to delete.

• See also: swift.common.db.AccountBroker for the broker class.
• See also: swift.common.ring.Ring.get_nodes() for a description of the node dicts.

reap_container(account, account_partition, account_nodes, container)

Deletes the data and the container itself for the given container. This will call reap_object() up to sqrt(self.concurrency) times concurrently for the objects in the container.

If there is any exception while deleting a single object, the process will continue for any other objects in the container and the failed objects will be tried again the next time this function is called with the same parameters.

If there is any exception while listing the objects for deletion, the process will stop (but will obviously be tried again the next time this function is called with the same parameters). This is a possibility since the listing comes from querying just the primary remote container server.

Once all objects have been attempted to be deleted, the container itself will be attempted to be deleted by sending a delete request to all container nodes. The format of the delete request is such that each container server will update a corresponding account server, removing the container from the account’s listing.

This function returns nothing and should raise no exception but only update various self.stats_* values for what occurs.

Parameters:

• account – The name of the account for the container.
• account_partition – The partition for the account on the account ring.
• account_nodes – The primary node dicts for the account.
• container – The name of the container to delete.

• See also: swift.common.ring.Ring.get_nodes() for a description of the account node dicts.

reap_device(device)

Called once per pass for each device on the server. This will scan the accounts directory for the device, looking for partitions this device is the primary for, then looking for account databases that are marked status=DELETED and still have containers and calling reap_account(). Account databases marked status=DELETED that no longer have containers will eventually be permanently removed by the reclaim process within the account replicator (see swift.db_replicator).

Parameters:

• device – The device to look for accounts to be deleted.

reap_forever()

Main entry point when running the reaper in its normal daemon mode. This repeatedly calls reap_once() no quicker than the configuration interval.

reap_object(account, container, container_partition, container_nodes, obj)

Deletes the given object by issuing a delete request to each node for the object. The format of the delete request is such that each object server will update a corresponding container server, removing the object from the container’s listing.

This function returns nothing and should raise no exception but only update various self.stats_* values for what occurs.

Parameters:

• account – The name of the account for the object.
• container – The name of the container for the object.
• container_partition – The partition for the container on the container ring.
• container_nodes – The primary node dicts for the container.
• obj – The name of the object to delete.

• See also: swift.common.ring.Ring.get_nodes() for a description of the container node dicts.

reap_once()

Main entry point when running the reaper in ‘once’ mode, where it will do a single pass over all accounts on the server. This is called repeatedly by reap_forever(). This will call reap_device() once for each device on the server.