Failed to run patroni - postgresql

Question

I have follow this tutorial: https://linode.com/docs/databases/postgresql/create-a-highly-available-postgresql-cluster-using-patroni-and-haproxy/ , in order to set up Highly Available PostgreSQL Cluster Using Patroni and HAProxy.
But when I try to start patroni I get this error:
ubuntu#sudo patroni /etc/patroni.yml
2018-05-31 09:49:37,159 INFO: Failed to import patroni.dcs.consul
2018-05-31 09:49:37,166 INFO: Selected new etcd server http://privateetcdIP:2379
2018-05-31 09:49:37,173 INFO: Lock owner: None; I am postgresqlm
2018-05-31 09:49:37,175 INFO: trying to bootstrap a new cluster
pg_ctl: cannot be run as root
Please log in (using, e.g., "su") as the (unprivileged) user that will
own the server process.
2018-05-31 09:49:37,185 INFO: removing initialize key after failed attempt to bootstrap the cluster
2018-05-31 09:49:37,673 INFO: Lock owner: None; I am postgresqlm
Traceback (most recent call last):
File "/usr/local/bin/patroni", line 9, in <module>
load_entry_point('patroni==1.4.4', 'console_scripts', 'patroni')()
File "/usr/local/lib/python2.7/dist-packages/patroni/__init__.py", line 176, in main
return patroni_main()
File "/usr/local/lib/python2.7/dist-packages/patroni/__init__.py", line 145, in patroni_main
patroni.run()
File "/usr/local/lib/python2.7/dist-packages/patroni/__init__.py", line 114, in run
logger.info(self.ha.run_cycle())
File "/usr/local/lib/python2.7/dist-packages/patroni/ha.py", line 1164, in run_cycle
info = self._run_cycle()
File "/usr/local/lib/python2.7/dist-packages/patroni/ha.py", line 1077, in _run_cycle
return self.post_bootstrap()
File "/usr/local/lib/python2.7/dist-packages/patroni/ha.py", line 976, in post_bootstrap
self.cancel_initialization()
File "/usr/local/lib/python2.7/dist-packages/patroni/ha.py", line 971, in cancel_initialization
raise PatroniException('Failed to bootstrap cluster')
The configuration of /etc/patroni.yml is:
scope: postgres
namespace: /db/
name: postgresqlm
restapi:
listen: privateIPoffirstnode:8008
connect_address: privateIPoffirstnode:8008
etcd:
host: privateIPofetcd:2379
bootstrap:
dcs:
ttl: 30
loop_wait: 10
retry_timeout: 10
maximum_lag_on_failover: 1048576
postgresql:
use_pg_rewind: true
max_connections: 100
initdb:
- encoding: UTF8
- data-checksums
pg_hba:
- host replication replicator 127.0.0.1/32 md5
- host replication replicator privateIPoffirstnode/0 md5
- host replication replicator privateIPofsecondnode/0 md5
- host replication replicator privateIPofthirdnode/0 md5
- host all all 0.0.0.0/0 md5
users:
admin:
password: admin
options:
- createrole
- createdb
postgresql:
listen: privateIPoffirstnode:5432
connect_address: privateIPoffirstnode:5432
data_dir: /data/patroni
pgpass: /tmp/pgpass
bin_dir: /usr/lib/postgresql/9.5/bin
authentication:
replication:
username: replicator
password: rep-pass
superuser:
username: postgres
password: '12345'
parameters:
unix_socket_directories: '.'
tags:
nofailover: false
noloadbalance: false
clonefrom: false
nosync: false
The configuration of /etc/systemd/system/patroni.service is:
[Unit]
Description=Runners to orchestrate a high-availability PostgreSQL
After=syslog.target network.target
[Service]
Type=simple
User=postgres
Group=postgres
ExecStart=/usr/local/bin/patroni /etc/patroni.yml
KillMode=process
TimeoutSec=30
Restart=no
[Install]
WantedBy=multi-user.targ
etcd congiguration:
ETCD_LISTEN_PEER_URLS="http://privateIPofetcd:2380"
ETCD_LISTEN_CLIENT_URLS="http://localhost:2379,http://privateIPofetcd:2379"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://privateIPofetcd:2380"
ETCD_INITIAL_CLUSTER="etcd0=http://privateIPofetcd:2380,"
ETCD_ADVERTISE_CLIENT_URLS="http://privateIPofetcd:2379"
ETCD_INITIAL_CLUSTER_TOKEN="cluster1"
ETCD_INITIAL_CLUSTER_STATE="new"
Of course, I have the real ips in privateIPoffirstnode, privateIPofsecondnode etc.
So, does anyone know what this error means?

Answer 1

I think the answer is obvious. If you start patroni with sudo, it will run as root, and that is exactly the error message you get.
Why don't you start it via systemctl? Your /etc/systemd/system/patroni.service has correctly configured a User that is not root.

Answer 2

Follow this guide to configure highly available Postgresql cluster.
Its fully tested and working.