Removed aws reference from Dockerfile, remove unnecessary steps.
Connect using libpq parameters, therefore providing nice application name for Governor.
For the postgresql helper, hardened the code to get "the" cursor of the postgresql instance.
For the statuspage, a small status json is returned.
To find out what status a PostgreSQL cluster is in we use the cursor (instead of the provided query() function), as the query function does some retrying etc. For the healthcheck we want to simple provide an answer to a simple query, if we have to reconnect, we are not *that* healthy anyway.
Dropped catching exceptions in the do_GET block, as the HTTPServer will do that nicely for us anyway.
The StatusPage uses a BaseHTTPServer to server 3 simple http endpoints:
- pg_master, returns 200 if PostgreSQL is running as master
- pg_slave, returns 200 if PostgreSQL is running as slave
- pg_status, returns some information about the cluster
It does this by relying on the PostgreSQL connection of the Governor.
Feike Steenbergen