With this variables set to true, if $VAR is used as a value in the
configuration file, then `$VAR` will be replaced with the value of
the environment variable VAR.
The total timeout for the retrying of interrupted queries can now be
configured with the `query_retry_timeout` parameter. It controls the total
timeout in seconds that the query can take.
The actual connection, read and write timeouts of the connector aren't a
good configuration value to use for abstracted queries as the time that it
takes to execute a query can be composed of both connections, reads and
writes. This is caused by the usage of MYSQL_OPT_RECONNECT that hides the
fact that the connector reconnects to the server when a query is
attempted.
The new `query_retries` parameter controls how many times an interrupted
query is retried. This retrying of interrupted queries will reduce the
rate of false positives that MaxScale monitors detect.
The `add user` and `enable account` commands create fully privileged
administrative users like they did in 2.1. This makes the addition of
read-only users backwards compatible.
Updated and expanded the documentation on administrative interface
users. Added entries into the release notes as well as the upgrading
document about relevant changes between 2.1 and 2.2.
The setting parsing is now similar to the other server settings.
The header is printed if log_info is on.
Changed the setting name to simply "proxy_protocol".
Updated documentation.
The admin interface now uses HTTP BA authentication by default. This will
prevent unrestricted access to the REST API but the authentication is by
no means secure and the HTTPS mode for the REST API should be enabled for
all production systems.
The REST API now uses the same users as MaxAdmin network interface. This
allows them to be created with MaxAdmin.
The next step is to add user creation to the REST API.
The parameter names for monitors and servers now use a set of constant
names. This removes some of the errors caused by spelling mistakes when
the same parameter name is repeated in multiple places.
The service, filter and listener parameters should also be converted to
constants. This allows for a consistent user experience.
The admin interface now supports Basic Access authentication. This is not
a secure method of authentication and it should not be used without
unencrypted connections.
Made the admin interface port, authentication, username and password
configurable.
The connector plugin directory can now be controlled with the
`connector_plugindir` argument and configuration option. This should allow
the connector to use the system plugins if the versions are binary
compatible.
Replaced calls to mysql_options to mysql_optionsv as the former is
deprecated in Connector-C 3.0 and the latter is supported in Connector-C
2.3.
The use of monitors in services isn't complete but this was not in the
documentation. A more complete solution should be done at a later date and
the current documentation should be removed.
Added documentation for dbfwfilter and mentioned the new directory in the
release notes. The configuration guide also gives an example of how the
path parameters are resolved.
This directory is intended to be the default working directory for
relative pathname resolution. The actual implementation for
MXS_MODULE_PARAM_PATH is done at a later step.
The listen() backlog is now set to INT_MAX which should guarantee that the
internal limit is always higher than the system limit. This means that the
length of the queue always follows /proc/sys/net/ipv4/tcp_max_syn_backlog.
MaxScale shouldn't require the service and monitor user checks. It makes
sense to disable the checks to speed up the startup process when the user
knows that the permissions are OK.
