Our current master branch doesn't pass the code coverage test, due to behaviour changes
in upstream python-etcd.
As a bandaid, fix the version for now.
Reference build fail:
https://travis-ci.org/zalando/patroni/jobs/98470121
- add unit tests for the restore module
- additional dependencies in requirement
- harden the code that calls restore callbacks
- remove WAL-E related code from postgresql.py
This implementation is using the same interface (AbstractDCS) as Etcd
class. It means that there should be no problem to implement another
plugin to work agains Consul for example.
In case if one member of a cluster is not available it will retry with
another one and fetch the new cluster configuration. Default timeout for
all requests to etcd is 5 seconds.
Initial cluster configuration can be resolved through:
1) /v2/members call on one of the cluster members on a client port
2) when it is possible to resolve hostname into multiple ip's it will
iterate through list and try to perform action from 1)
3) If there is discovery_srv defined in etcd section of config file it
will resolve peer addresses of all cluster members and will fetch
cluster configuration with using peer protocol by doing /members call on
a peer port
Oleksii Kliukin