recovering backup - rsync acces denied

[dulh...@mailbox.org]

I am trying to get streaming backups going.

As I couldn't figure out yet how to address a secondary recovery server (which I assume to be the recomemnded method) I try to recover a barman backup on the main server where I run into rsync errors. 

barman@vm-51150-0188:~> barman recover vm-51150-0196 20211228T144114 /opt/db/data/postgres/data
Starting local restore for server vm-51150-0196 using backup 20211228T144114
Destination directory: /opt/db/data/postgres/data
Copying the base backup.
ERROR: Failure copying base backup: data transfer failure
rsync error:
rsync: change_dir#1 "/opt/db/data/postgres/data" failed: Permission denied (13)
rsync error: errors selecting input/output files, dirs (code 3) at main.c(621) [Receiver=3.1.3]

my surpise that rsync is involved at all with backup-method postgres aside ... I can't make much sense of this

1. there is a user barman on that server.
2. the permissions on the PGDATA directory are quite permissive (0760 with barman user being a member of the postgres group)
   
3. I can rsync random files as barman user from the barman server into the PGDATA folder
   

[Michael Wallace]

Rsync is used for recovering backups regardless of the backup method used to create them. In your example the permissions on your PGDATA directory aren't going to be enough since the barman user will need execute permissions on the target directory.

In order to recover to a remote server you will need to add the --remote-ssh-command option to your `barman recover` command, e.g.: barman recover --remote-ssh-command='postgres@SECONDARY_SERVER' vm-51150-0196 20211228T144114 /opt/db/data/postgres/data

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