First version of bigquery backend.

Lot of TODOs. But it should be good enough for anyone who wants to try
it out. Marked experimental.

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)

cadvisor.go

@@ -31,7 +31,7 @@ import (
 
 var argPort = flag.Int("port", 8080, "port to listen")
 
-var argDbDriver = flag.String("storage_driver", "memory", "storage driver to use. Options are: memory (default) and influxdb")
+var argDbDriver = flag.String("storage_driver", "memory", "storage driver to use. Options are: memory (default), bigquery, and influxdb")
 
 func main() {
 	flag.Parse()

storage/bigquery/README.md

@@ -0,0 +1,24 @@
+BigQuery Storage Driver
+=======
+
+[EXPERIMENTAL] Support for bigquery backend as cAdvisor storage driver.
+The current implementation takes bunch of BigQuery specific flags for authentication.
+These will be merged into a single backend config.
+
+To run the current version, following flags need to be specified:
+```
+ # Storage driver to use.
+ -storage_driver=bigquery
+ # Information about server-to-server Oauth token.
+ # These can be obtained by creating a Service Account client id under `Google Developer API`
+ # service client id
+ -bq_id="XYZ.apps.googleusercontent.com"
+ # service email address
+ -bq_account="ABC@developer.gserviceaccount.com"
+ # path to pem key (converted from p12 file)
+ -bq_credentials_file="/path/to/key.pem"
+ # project id to use for storing datasets.
+ -bq_project_id="awesome_project"
+```
+
+See Service account Authentication](https://developers.google.com/accounts/docs/OAuth2) for Oauth related details.