pg_basebackup

Hello,

I am taking pg_basebackup of primary db (docker container env.) using the below command :

pg_basebackup -x -h vmzti -U replication -D /etc/postgresql/9.5/main/pg_basebkp/basekp1224 -Ft -z -P
Password:
WARNING: skipping special file "./postgresql.conf"
WARNING: skipping special file "./postgresql.conf"
4048512/4048512 kB (100%), 1/1 tablespace

* Getting the above warning message.
* Also the backup has been completed with only the single file "tar -xvf base.tar.gz" as an output but there is no tar -xvf pg_wal.tar.gz file exist.
* If we decompress the file "tar -xvf base.tar.gz" , I do not see the postmaster.opts file.

Note: We have the different path for the conf files :

data_directory = '/var/lib/postgresql/9.5/main' # use data in another directory # (change requires restart)
hba_file = '/etc/postgresql/9.5/main/pg_hba.conf' # host-based authentication file # (change requires restart)
ident_file = '/etc/postgresql/9.5/main/pg_ident.conf' # ident configuration file # (change requires restart)

postgres=# SHOW config_file;
config_file
----------------------------------------------
/var/lib/postgresql/9.5/main/postgresql.conf
(1 row)

postgres=# show hba_file;
hba_file
--------------------------------------
/etc/postgresql/9.5/main/pg_hba.conf
(1 row)

postgres=#

More details:

postgres(at)4ed92bac84af:/var/lib/postgresql/9.5/main$ ls -ltr
total 128
-rw------- 1 postgres postgres 208 Sep 13 2017 backup_label.old
drwx------ 8 postgres postgres 4096 Sep 13 2017 base
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_commit_ts
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_dynshmem
drwx------ 4 postgres postgres 4096 Sep 13 2017 pg_multixact
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_replslot
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_serial
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_snapshots
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_stat
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_stat_tmp
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_tblspc
drwx------ 2 postgres postgres 4096 Sep 13 2017 pg_twophase
-rw------- 1 postgres postgres 4 Sep 13 2017 PG_VERSION
-rw------- 1 postgres postgres 88 Sep 13 2017 postgresql.auto.conf
-rwxr-xr-x 1 postgres postgres 22116 Sep 13 2017 postgresql.conf.orig
drwx------ 2 postgres postgres 12288 Sep 13 2017 pg_log
lrwxrwxrwx 1 postgres postgres 38 Sep 13 2017 recovery.conf -> /etc/postgresql/9.5/main/recovery.conf
lrwxrwxrwx 1 postgres postgres 40 Sep 13 2017 postgresql.conf -> /etc/postgresql/9.5/main/postgresql.conf
-rw------- 1 postgres postgres 90 May 21 2019 postmaster.pid
drwx------ 2 postgres postgres 4096 May 21 2019 pg_notify
-rw------- 1 postgres postgres 46 May 21 2019 postmaster.opts
drwx------ 2 postgres postgres 8192 Dec 11 08:10 global
drwx------ 2 postgres postgres 4096 Dec 17 20:12 pg_clog
drwx------ 2 postgres postgres 4096 Dec 17 20:16 pg_subtrans
drwxrwxrwx 2 postgres postgres 4096 Dec 18 08:31 backup
drwx------ 3 postgres postgres 4096 Dec 18 15:56 pg_xlog
drwx------ 4 postgres postgres 4096 Dec 18 16:31 pg_logical
postgres(at)4ed92bac84af:/var/lib/postgresql/9.5/main$
ident.conf

Please advise.

Thanks,