hi

for install kong on centos7.2-x86-64 i first install "postgresql94-server" and "postgresql94-contrib" package and then run this command :

/usr/pgsql-9.4/bin/postgresql94-setup initdb

and then start postgresql service.

after that i create linux user by name "kong" with "kong" password.

after that i login to postgresql :

su - postgres

and then run :

$psql

and then run this command for create user and database :

CREATE USER kong; CREATE DATABASE kong OWNER kong;

then exit of postgresql and login to linux user kong :

su - kong

for start kong i run this command :

$ kong start

but display this error :

$ kong start
ulimit is currently set to "1024". For better performance set it to at least "4096" using "ulimit -n"
Error: /usr/local/share/lua/5.1/kong/cmd/start.lua:18: [postgres error] FATAL: Ident authentication failed for user "kong"

Run with --v (verbose) or --vv (debug) for more details

for more info :

$ kong start --vv
2016/12/12 23:21:27 [verbose] Kong: 0.9.5
2016/12/12 23:21:27 [debug] ngx_lua: 10006
2016/12/12 23:21:27 [debug] nginx: 1011002
2016/12/12 23:21:27 [debug] Lua: LuaJIT 2.1.0-beta2
2016/12/12 23:21:27 [debug] PRNG seed: 568211172181
2016/12/12 23:21:27 [verbose] reading config file at /etc/kong.conf
2016/12/12 23:21:27 [debug] admin_listen = "0.0.0.0:8001"
2016/12/12 23:21:27 [debug] anonymous_reports = true
2016/12/12 23:21:27 [debug] cassandra_consistency = "ONE"
2016/12/12 23:21:27 [debug] cassandra_contact_points = {"127.0.0.1"}
2016/12/12 23:21:27 [debug] cassandra_data_centers = {"dc1:2","dc2:3"}
2016/12/12 23:21:27 [debug] cassandra_keyspace = "kong"
2016/12/12 23:21:27 [debug] cassandra_port = 9042
2016/12/12 23:21:27 [debug] cassandra_repl_factor = 1
2016/12/12 23:21:27 [debug] cassandra_repl_strategy = "SimpleStrategy"
2016/12/12 23:21:27 [debug] cassandra_ssl = false
2016/12/12 23:21:27 [debug] cassandra_ssl_verify = false
2016/12/12 23:21:27 [debug] cassandra_timeout = 5000
2016/12/12 23:21:27 [debug] cassandra_username = "kong"
2016/12/12 23:21:27 [debug] cluster_listen = "0.0.0.0:7946"
2016/12/12 23:21:27 [debug] cluster_listen_rpc = "127.0.0.1:7373"
2016/12/12 23:21:27 [debug] cluster_profile = "wan"
2016/12/12 23:21:27 [debug] cluster_ttl_on_failure = 3600
2016/12/12 23:21:27 [debug] custom_plugins = {}
2016/12/12 23:21:27 [debug] database = "postgres"
2016/12/12 23:21:27 [debug] dnsmasq = true
2016/12/12 23:21:27 [debug] dnsmasq_port = 8053
2016/12/12 23:21:27 [debug] log_level = "notice"
2016/12/12 23:21:27 [debug] lua_code_cache = "on"
2016/12/12 23:21:27 [debug] lua_package_cpath = ""
2016/12/12 23:21:27 [debug] lua_package_path = "?/init.lua;./kong/?.lua"
2016/12/12 23:21:27 [debug] lua_ssl_verify_depth = 1
2016/12/12 23:21:27 [debug] mem_cache_size = "128m"
2016/12/12 23:21:27 [debug] nginx_daemon = "on"
2016/12/12 23:21:27 [debug] nginx_optimizations = true
2016/12/12 23:21:27 [debug] nginx_worker_processes = "auto"
2016/12/12 23:21:27 [debug] pg_database = "kong"
2016/12/12 23:21:27 [debug] pg_host = "127.0.0.1"
2016/12/12 23:21:27 [debug] pg_password = "******"
2016/12/12 23:21:27 [debug] pg_port = 5432
2016/12/12 23:21:27 [debug] pg_ssl = false
2016/12/12 23:21:27 [debug] pg_ssl_verify = false
2016/12/12 23:21:27 [debug] pg_user = "kong"
2016/12/12 23:21:27 [debug] prefix = "/usr/local/kong/"
2016/12/12 23:21:27 [debug] proxy_listen = "0.0.0.0:8000"
2016/12/12 23:21:27 [debug] proxy_listen_ssl = "0.0.0.0:8443"
2016/12/12 23:21:27 [debug] serf_path = "serf"
2016/12/12 23:21:27 [debug] ssl = true
2016/12/12 23:21:27 [verbose] prefix in use: /usr/local/kong
2016/12/12 23:21:27 [verbose] preparing nginx prefix directory at /usr/local/kong
2016/12/12 23:21:27 [verbose] saving serf identifier to /usr/local/kong/serf/serf.id
2016/12/12 23:21:27 [debug] searching for OpenResty 'resty' executable
2016/12/12 23:21:27 [debug] /usr/local/openresty/bin/resty -V: 'nginx version: openresty/1.11.2.1'
2016/12/12 23:21:27 [debug] found OpenResty 'resty' executable at /usr/local/openresty/bin/resty
2016/12/12 23:21:27 [verbose] saving serf shell script handler to /usr/local/kong/serf/serf_event.sh
2016/12/12 23:21:27 [verbose] SSL enabled, no custom certificate set: using default certificate
2016/12/12 23:21:27 [verbose] default SSL certificate found at /usr/local/kong/ssl/kong-default.crt
2016/12/12 23:21:27 [warn] ulimit is currently set to "1024". For better performance set it to at least "4096" using "ulimit -n"
2016/12/12 23:21:27 [verbose] running datastore migrations
2016/12/12 23:21:27 [verbose] could not start Kong, stopping services
2016/12/12 23:21:27 [verbose] leaving serf cluster
2016/12/12 23:21:27 [verbose] stopping dnsmasq at /usr/local/kong/pids/dnsmasq.pid
2016/12/12 23:21:27 [debug] sending signal to pid at: /usr/local/kong/pids/dnsmasq.pid
2016/12/12 23:21:27 [debug] no pid file at: /usr/local/kong/pids/dnsmasq.pid
2016/12/12 23:21:27 [verbose] stopped services
Error:
/usr/local/share/lua/5.1/kong/cmd/start.lua:37: /usr/local/share/lua/5.1/kong/cmd/start.lua:18: [postgres error] FATAL: Ident authentication failed for user "kong"
stack traceback:
[C]: in function 'error'
/usr/local/share/lua/5.1/kong/cmd/start.lua:37: in function 'cmd_exec'
/usr/local/share/lua/5.1/kong/cmd/init.lua:89: in function </usr/local/share/lua/5.1/kong/cmd/init.lua:89>
[C]: in function 'xpcall'
/usr/local/share/lua/5.1/kong/cmd/init.lua:89: in function </usr/local/share/lua/5.1/kong/cmd/init.lua:45>
/usr/local/bin/kong:15: in function 'file_gen'
init_worker_by_lua:38: in function <init_worker_by_lua:36>
[C]: in function 'pcall'
init_worker_by_lua:45: in function <init_worker_by_lua:43>

$ kong version
0.9.5

$ uname -r
3.10.0-327.el7.x86_64

how can i fix this error?
tnx