Since 01d07f86c, the permissions of postgresql.conf created in PGDATA was
explicitly set. However, the umask of the Patroni process was adjusted as well
and as a result of this, Patroni would write postgresql.conf with 600
permissions if the configuration files are outside PGDATA.
Fix this by using the original umask as mode for files created outside PGDATA.
Fixes: #3302
This allows to set whether a particular permanent replication slot should always be created ('cluster_type=any', the default), or just on a primary ('cluster_type=primary') or standby ('cluster_type=standby') cluster, respectively.
When a replication slot is not registered with Patroni but is active, Patroni would log an error during each HA cycle in certain conditions (after a restart or role change). To avoid this, first check if the replication slot we are about to drop is still active and if so, only log a warning. Otherwise, log the slot we are dropping for informational purposes.
Close: #2499
Otherwise, the etcd (not etcd3) behave tests fail to connect:
```
Jan 02 09:56:18 HOOK-ERROR in before_all: AssertionError: etcd instance is not available for queries after 5 seconds
```
This adds a paragraph to the Standby Cluster section clarifying that the standby cluster is independent of the primary cluster and not visible from the primary cluster's Patroni interface.
Close#2090
This allows to have multiple hosts in a standby_cluster and ensures that the standby leader follows the main cluster's new leader after a switchover.
Partially addresses #2189
Sphinx' add_stylesheet() has been deprecated for a long time and got removed in recent versions of sphinx. If available, use add_css_file() instead.
Close#2079.
This field notes the last time (as unix epoch) a cluster member has successfully communicated with the DCS. This is useful to identify and/or analyze network partitions.
Also, expose dcs_last_seen in the MemberStatus class and its from_api_response() method.
This adds the `selector` to the Patroni Kubernetes StatefulSet spec
Without it, one gets errors like
```
error: error validating "patroni_k8s.yaml": error validating data: ValidationError(StatefulSet.spec): missing required field "selector" in io.k8s.api.apps.v1.StatefulSetSpec; if you choose to ignore these errors, turn validation off with --validate=false
```
(as mentioned in #1867)
