If the MySQL driver is available and --db-driver option was explicitly
specified, assume MySQL and don't compain about multiple DB drivers
being available.
That was a popular request and is likely what most sysbench users want.
The problem with MySQL 5.7+ client libraries was that there was no way
to disable SSL usage from the sysbench command line, because the client
library defaults to MYSQL_OPT_SSL_MODE = SSL_MODE_REQUIRED, even if
--mysql-ssl is not used. So the only way to disable it was disabling SSL
on the server.
Now --mysql-ssl behaves like the --ssl-mode option in MySQL client
utilities. It accepts the following values (with "disabled" being the
default):
disabled, preferred, required, verify_ca, verify_identity.
When sysbench is built With pre-5.6 MySQL client libraries or MariaDB
client libraries, where support for SSL modes is not available,
--mysql-ssl behavior is not affected by this change, i.e. it remains a
boolean variable accepting the on/off values, with "off" being the
default.
Replace hard-coded values for client SSL path names with driver options,
at the same time making it possible to skip those options even when
--mysql-ssl is used.
All bundled OLTP tests now declare their supported options. Which means:
- unknown options are not be silently accepted, but throw an
error (fixes#15)
- 'sysbench /any OLTP script/ help' now prints a list of supported
options, their descriptions, types and default values just as built-in
tests do (fixes#79)
- add support for 'validator' functions
- add support to define command line options after test
initialization. It is a prerequisite for option definitions in Lua
scripts
- various code cleanups
Move regression tests into a separate subdirectory. Update README in
tests and covert it from org-mode to markdown. Also add 'make distcheck'
to Travis CI testing.
