Always writing table in to a single node. Percona postgres Citus , Sharding not working

[SHUFIL]

Report

I need to share a single table in to multiple nodes using Sharding , I have used this Doc

More about the problem

I need to share a single table in to multiple nodes using Sharding , which is not happening , it is writing only a single node always

Steps to reproduce

1. I have tested using below command

    SET citus.explain_all_tasks TO on;
    EXPLAIN ANALYZE SELECT * FROM events;

2. When I do analyze using analyze command , it is write only in single system , not both, below you can see that out put.

 testdb=# EXPLAIN ANALYZE SELECT * FROM events;
                                                          QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
 Custom Scan (Citus Adaptive)  (cost=0.00..0.00 rows=100000 width=52) (actual time=38.927..38.928 rows=5 loops=1)
   Task Count: 32
   Tuple data received from nodes: 290 bytes
   Tasks Shown: One of 32
   ->  Task
         Tuple data received from node: 0 bytes
         Node: host=192.168.1.100 port=5432 dbname=testdb
         ->  Seq Scan on events_102040 events  (cost=0.00..20.20 rows=1020 width=52) (actual time=0.005..0.006 rows=0 loops=1)
             Planning Time: 0.509 ms
             Execution Time: 0.032 ms
 Planning Time: 1.453 ms
 Execution Time: 38.974 ms
(12 rows)

4. nodes details getting correctly from both nodes

postgres=# SELECT * FROM pg_dist_node;
 nodeid | groupid |   nodename    | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards
--------+---------+---------------+----------+----------+-------------+----------+----------+-------------+----------------+------------------
     18 |      17 | 192.168.1.100 |     5432 | default  | t           | t        | primary  | default     | t              | t
      1 |       0 | 192.168.1.101 |     5432 | default  | t           | t        | primary  | default     | t              | f
     20 |      19 | 192.168.1.150 |     5435 | default  | t           | t        | primary  | default     | t              | t
(3 rows)

Worker nodes list from both server.

postgres=# SELECT * FROM citus_get_active_worker_nodes();
   node_name   | node_port
---------------+-----------
 192.168.1.150 |      5435
 192.168.1.100 |      5432
(2 rows)

Versions

Database Postgres percona cluster

postgres=# SELECT VERSION();
                                                          version
------------------------------------------------------------------------------------------------------------------------------
PostgreSQL 15.7 - Percona Distribution on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
(1 row)

citus_version

postgres=# select citus_version();
                                           citus_version
----------------------------------------------------------------------------------------------------
 Citus 12.0.1 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
(1 row)

Anything else?

No response

[hors]

Hi @SHUFIL did you use PG k8s operator? We do not have citus extension in our operator images and we did not test citus with operator.