default role = "primary" Not Working

[aviralsingh21]

I have setup of HA 3-nodes of PostgreSQL with the help of Patroni-ETCD in the docker swarm environment.
I am setting up pgcat and I want to redirect all the read-write transactions only to the primary role. But I have tried different valued for default_role like any, replica and primary. But no matter what is the value set but connections are happening completely random.

pgcat.toml:

`[general]
host = "0.0.0.0"
port = 6432
enable_prometheus_exporter = false
connect_timeout = 5000
idle_timeout = 30000
server_lifetime = 86400000
idle_client_in_transaction_timeout = 0
healthcheck_timeout = 1000
healthcheck_delay = 30000
log_client_connections = true
log_client_disconnections = true
worker_threads = 1
tcp_keepalives_idle = 480
tcp_keepalives_count = 5
tcp_keepalives_interval = 5
admin_username = "postgres"
admin_password = "postgres"

[plugins.query_logger]
enabled = true

[pools.patroni]

pool_mode = "session"
query_parser_enabled = false
default_role = "primary"
prepared_statements_cache_size = 500

[pools.patroni.users.0]
username = "postgres"
password = "postgres"
pool_size = 10
min_pool_size = 1

[pools.patroni.shards.0]
servers = [["192.168.1.25", 6437, "primary"], ["192.168.1.26", 6438, "replica"], ["192.168.1.27", 6439, "replica"]]
database = "patroni"`