Обсуждение: Trouble setting up Streaming Replication with Barman

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Trouble setting up Streaming Replication with Barman

От
Evan Walter
Дата:
Hello,
I am trying to set up streaming replication with barman, going down the tutorial. 

When I run/ I get:

$barman receive-wal --create-slot pg

ERROR: Cannot connect to server 'pg'

##############################################################
Both servers Ubuntu 18.04, Postgresql 12.1

These are the configurations I have set up so far:
The Main Postgres Server: ###############################
$nano /etc/postgresql/12/main/postgresql.conf
--------------------------------------------------
....
listening_addresses = '*'
wal_level = hot_standby
archive_mode = on
archive_command = 'cp %p /<my-wal_archive-dir-here>/%f'  
max_wal_senders =3
max_replication_slots = 3
wal_keep_segments = 512
hot_standby = on

$nano /etc/postgresql/12/main/pg_hba.conf
----------------------------------------------
....
host all barman  <my-barman-ipaddress-here>/32    md5
host all streaming_barman  <my-barman-ipaddress-here>/32    md5




The Barman Server (logged in as barman): ###############################
$psql -c 'SELECT version()' -U barman -h <my-ipaddress-here> postgres

                                               version
-----------------------------------------------------------------------------
PostgreSQL 12.1 (Ubuntu 12.1-1.pgdg18.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0, 64-bit
(1 row)

$cat /etc/barman.d/pg.conf
[pg]
description = "Streaming Replication"
conninfo = host=<my-pg-server-ipaddress-here> user=barman dbname=postgres
streaming_conninfo = host=<my-pg-server-ipaddress-here> user=streaming_barman dbname=postgres
backup_method = postgres
streaming_archiver = on
slot_name = barman


When I run/ I get:

$barman receive-wal --create-slot pg

ERROR: Cannot connect to server 'pg'



Thanks





Re: Trouble setting up Streaming Replication with Barman

От
Ian Barwick
Дата:
On 2019/11/22 7:07, Evan Walter wrote:
> Hello,
> I am trying to set up streaming replication with barman, going down the tutorial.
> 
> When I run/ I get:
> 
> $barman receive-wal --create-slot pg
> 
> ERROR: Cannot connect to server 'pg'

 >
 > $cat /etc/barman.d/pg.conf
 > [pg]
(...)
 > streaming_conninfo = host=<my-pg-server-ipaddress-here> user=streaming_barman dbname=postgres

(...)
 > $nano /etc/postgresql/12/main/pg_hba.conf
(...)
> host all streaming_barman  <my-barman-ipaddress-here>/32    md5

The "streaming_barman" user should be a user with replication permissions
(if not already set, execute "ALTER USER streaming_barman REPLICATION")
and appropriate permission granted in "pg_hba.conf":

   host replication streaming_barman  <my-barman-ipaddress-here>/32    md5


> The Barman Server (logged in as barman): ###############################
> $psql -c 'SELECT version()' -U barman -h <my-ipaddress-here> postgres

Check the replication connection works with:

   psql -c 'IDENTIFY_SYSTEM' 'host=<my-ipaddress-here> dbname=postgres user=streaming_barman replication=1'


Regards

Ian Barwick


-- 
  Ian Barwick                   https://www.2ndQuadrant.com/
  PostgreSQL Development, 24x7 Support, Training & Services

Re: Trouble setting up Streaming Replication with Barman

От
swadesh mondal
Дата:
Hi All,

Any idea  how to prepare a script to populate multiple tables with random data ?

Regards,
Swadesh

On Fri, Nov 22, 2019 at 2:58 AM Ian Barwick <ian.barwick@2ndquadrant.com> wrote:
On 2019/11/22 7:07, Evan Walter wrote:
> Hello,
> I am trying to set up streaming replication with barman, going down the tutorial.
>
> When I run/ I get:
>
> $barman receive-wal --create-slot pg
>
> ERROR: Cannot connect to server 'pg'

 >
 > $cat /etc/barman.d/pg.conf
 > [pg]
(...)
 > streaming_conninfo = host=<my-pg-server-ipaddress-here> user=streaming_barman dbname=postgres

(...)
 > $nano /etc/postgresql/12/main/pg_hba.conf
(...)
> host all streaming_barman  <my-barman-ipaddress-here>/32    md5

The "streaming_barman" user should be a user with replication permissions
(if not already set, execute "ALTER USER streaming_barman REPLICATION")
and appropriate permission granted in "pg_hba.conf":

   host replication streaming_barman  <my-barman-ipaddress-here>/32    md5


> The Barman Server (logged in as barman): ###############################
> $psql -c 'SELECT version()' -U barman -h <my-ipaddress-here> postgres

Check the replication connection works with:

   psql -c 'IDENTIFY_SYSTEM' 'host=<my-ipaddress-here> dbname=postgres user=streaming_barman replication=1'


Regards

Ian Barwick


--
  Ian Barwick                   https://www.2ndQuadrant.com/
  PostgreSQL Development, 24x7 Support, Training & Services




--
Regards,
Swadesh Mondal

Re: Trouble setting up Streaming Replication with Barman

От
Jakub Olczyk
Дата:
Hi Swadesh,

> Any idea  how to prepare a script to populate multiple tables with
> random data ?

I recommend using Datafiller[1] for that. You just need to have the DDL
of the tables. Based on that the program will create a script that
inserts randomly generated data.

[1] - https://www.cri.ensmp.fr/people/coelho/datafiller.html

Cheers,
jwo