* Implementation of optimistic lock pattern
Try to insert the remote cache key and handle integrity error
* Remove transaction
Integrity error inside a transaction results in deadlock
* Remove check for existing remote cache key
Is no longer needed since integrity constrain violations are handled
* Add check for integrity constrain violation
Do not update the row if the insert statement fails
for other than an integrity constrain violation
* Handle failing inserts because of deadlocks
If the insert statement fails because of a deadlock
try to update the row
* Add utility function for returning SQL error code
Useful for debugging
* Add logging for failing expired cache key deletion
Do not shallow it completely
* Revert "Add utility function for returning SQL error code"
This reverts commit 8e0b82c79633e7d8bc350823cbbab2ac7a58c0a5.
* Better log for failing deletion of expired cache key
* Add some comments
* Remove check for existing cache key
Attempt to insert the key without checking if it's already there
and handle the error situations
* Do not propagate deadlocks created during update
Most probably somebody else is trying to insert/update
the key at the same time so it is safe enough to ignore it
* db: add login attempt migrations
* db: add possibility to create login attempts
* db: add possibility to retrieve login attempt count per username
* auth: validation and update of login attempts for invalid credentials
If login attempt count for user authenticating is 5 or more the last 5 minutes
we temporarily block the user access to login
* db: add possibility to delete expired login attempts
* cleanup: Delete login attempts older than 10 minutes
The cleanup job are running continuously and triggering each 10 minute
* fix typo: rename consequent to consequent
* auth: enable login attempt validation for ldap logins
* auth: disable login attempts validation by configuration
Setting is named DisableLoginAttemptsValidation and is false by default
Config disable_login_attempts_validation is placed under security section
#7616
* auth: don't run cleanup of login attempts if feature is disabled
#7616
* auth: rename settings.go to ldap_settings.go
* auth: refactor AuthenticateUser
Extract grafana login, ldap login and login attemp validation together
with their tests to separate files.
Enables testing of many more aspects when authenticating a user.
#7616
* auth: rename login attempt validation to brute force login protection
Setting DisableLoginAttemptsValidation => DisableBruteForceLoginProtection
Configuration disable_login_attempts_validation => disable_brute_force_login_protection
#7616
