This commit deletes most of the code to service reads from influxdb
and pulls it in from platform instead.
Of note, the models.Tag and models.Tags types are now aliases to the
platform models.Tag and models.Tags types. Additionally, many types
in the tsdb package relating to cursors are also aliases to the same
types in the platform cursors package.
This updates the platform and flux repos to the current master in the
Gopkg.lock.
* the protocol service definition, ReadRequest and ReadResponse is
reused across projects, rather than requiring redefinition.
* the ReadRequest protocol buffer definition removes the concept of a
database and retention policy, replacing it with a field named
ReadSource of type google.protobuf.Any. OSS requests will use the
ReadSource message structure defined in local to this package, which
defines fields to represent a Database and RetentionPolicy. Other
implementations can provide their own data structure allowing the
remainder of the ReadRequest to be reused.
* The RPC service and Store are expected to be redefined to handle their
specific requirements for resolving a ReadSource
* ResultSet and GroupResultSet are interfaces representing non-grouping
and grouping read behavior respectively. Calling NewResultSet or
NewGroupResultSet will construct instances of these types
* The ResponseWriter type is exported to deal with serialization of
the ResultSet and GroupResultSet types
* Update Prometheus remote write to use metric name as measurement name and value as the field name.
* Update Prometheus remote read to use the storage.Read method to bypass the InfluxQL query engine.
Adds a new package prometheus for converting from remote reads and writes to Influx queries and points. Adds two new endpoints to the httpd handler to support prometheus remote read at /api/v1/prom/read and remote write at /api/v1/prom/write.
The only thing used from Prometheus is the storage/remote files that are generated from the remote.proto file. Copied that file into promtheus/remote package to avoid an extra dependency.
Jeff Wendling
Stuart Carnie
Edd Robinson
Paul Dix