This operation initiates the vault locking process by doing the
following:
Installing a vault lock policy on the specified vault.
 
Setting the lock state of vault lock to InProgress.
 
Returning a lock ID, which is used to complete the vault locking
process.
 
You can set one vault lock policy for each vault and this policy can be
up to 20 KB in size. For more information about vault lock policies, see
Amazon Glacier Access Control with Vault Lock Policies.
You must complete the vault locking process within 24 hours after the
vault lock enters the InProgress state. After the 24 hour window ends,
the lock ID expires, the vault automatically exits the InProgress
state, and the vault lock policy is removed from the vault. You call
complete_vault_lock to complete the
vault locking process by setting the state of the vault lock to
Locked.
After a vault lock is in the Locked state, you cannot initiate a new
vault lock for the vault.
You can abort the vault locking process by calling
abort_vault_lock. You can get the state of
the vault lock by calling get_vault_lock.
For more information about the vault locking process, Amazon Glacier Vault Lock.
If this operation is called when the vault lock is in the InProgress
state, the operation returns an AccessDeniedException error. When the
vault lock is in the InProgress state you must call
abort_vault_lock before you can initiate a
new vault lock policy.