This change adds a capability to vmpooler to provision instances on
demand. Without this change vmpooler only supports retrieving machines
from pre-provisioned pools.
Additionally, this change refactors redis interactions to reduce round
trips to redis. Specifically, multi and pipelined redis commands are
added where possible to reduce the number of times we are calling redis.
To support the redis refactor the redis interaction has changed to
leveraging a connection pool. In addition to offering multiple
connections for pool manager to use, the redis interactions in pool
manager are now thread safe.
Ready TTL is now a global parameter that can be set as a default for all
pools. A default of 0 has been removed, because this is an unreasonable
default behavior, which would leave a provisioned instance in the pool
indefinitely.
Pool empty messages have been removed when the pool size is set to 0.
Without this change, when a pool was set to a size of 0 the API and pool
manager would both show that a pool is empty.
This commit adds the extra_config option to vmpooler to allow specifying additional configuration files to load from. Without this change vmpooler does not offer a mechanism to provide additional configuration files for the application.
This commit adds a new configuration parameter to allow setting whether to create linked clones on a global, or per pool basis. Without this change vmpooler would always attempt to create linked clones. The default behavior of creating linked clones is preserved.
This commit updates vmpooler to set configuration values received via environment variables to integer values when an integer value is expected. Without this change vmpooler does not support setting integer values via environment variables. Additionally, testing is added for configuring vmpooler via environment variables.
To support this testing the gem climate_control is added, which allows
for testing environment variables without those set variables leaking to
other tests.
This commit updates vmpooler to ship VM usage stats when a VM is destroyed. The stats are gathered for jobs based on user and pool name. If a jenkins build URL is present then this is broken down by user, instance, value stream, branch and project. Additionally, if present then the RMM_COMPONENT_TO_TEST_NAME will be listed after project. Without this change we do not collect stats on per VM usage and its correlation to users and pools.
This commit adds documentation for specifying vmpooler configuration via environment variables. LDAP server is corrected to LDAP host, and the capability to specify graphite prefix and port is added. Vagrant documentation is moved into its own file to reduce noise in the main readme. Lastly, docker usage is updated to reflect that you no longer bake in a configuration file, and that API and manager can be run separately from docker via its entrypoint.
