Docker + Kong：[PostgreSQL 错误] 无法检索 PostgreSQL server_version_num：连接被拒绝

Question

我目前正在运行 Docker 19.03.5 并尝试复制 this article 的内容，但在第三步中出现以下错误：

第一步：

docker network create kong-net

第二：

docker run -d --name kong-database \
--network=kong-net \
-p 5555:5432 \
-e “POSTGRES_USER=kong” \
-e “POSTGRES_DB=kong” \
postgres:9.6

第三：

docker run --rm \
--network=kong-net \
-e “KONG_DATABASE=postgres” \
-e “KONG_PG_HOST=kong-database” \
kong:latest kong migrations up

在这第三步，如果我使用详细选项，我会看到以下错误：

2019/12/02 15:51:25 [verbose] Kong: 1.4.0
Error: 
/usr/local/share/lua/5.1/kong/cmd/migrations.lua:93: [PostgreSQL error] failed to retrieve 
PostgreSQL server_version_num: connection refused
stack traceback:
[C]: in function 'assert'
/usr/local/share/lua/5.1/kong/cmd/migrations.lua:93: in function 'cmd_exec'
/usr/local/share/lua/5.1/kong/cmd/init.lua:87: in function </usr/local/share/lua/5.1/kong/cmd/init.lua:87>
[C]: in function 'xpcall'
/usr/local/share/lua/5.1/kong/cmd/init.lua:87: in function </usr/local/share/lua/5.1/kong/cmd/init.lua:44>
/usr/local/bin/kong:9: in function 'file_gen'
init_worker_by_lua:48: in function <init_worker_by_lua:46>
[C]: in function 'xpcall'
init_worker_by_lua:55: in function <init_worker_by_lua:53>
2019/12/02 15:51:25 [verbose] no config file found at /etc/kong/kong.conf
2019/12/02 15:51:25 [verbose] no config file found at /etc/kong.conf
2019/12/02 15:51:25 [verbose] no config file, skip loading
2019/12/02 15:51:25 [verbose] prefix in use: /usr/local/kong

我的docker logs -f --tail 10 kong-database：

PostgreSQL init process complete; ready for start up.

LOG:  database system was shut down at 2019-12-02 12:22:46 UTC
LOG:  MultiXact member wraparound protections are now enabled
LOG:  autovacuum launcher started
LOG:  database system is ready to accept connections

我正在运行 Ubuntu 18.04，并且没有其他网络或容器在运行。

Answer 1

你指的文章有点过时了

Kong

参考https://hub.docker.com/_/kong

Kong 文档https://docs.konghq.com/install/docker

下面的说明应该可以工作

创建 docker 网络

docker network create kong-net

启动 PostgreSQL 容器

docker run -d --name kong-database \
--network=kong-net \
-p 5555:5432 \
-e "POSTGRES_USER=kong" \
-e "POSTGRES_DB=kong" \
-e "POSTGRES_PASSWORD=kong" \
postgres:12.2

准备您的数据库

docker run --rm \
--network=kong-net \
-e "KONG_DATABASE=postgres" \
-e "KONG_PG_HOST=kong-database" \
-e "KONG_PG_PASSWORD=kong" \
kong:2.0.3 kong migrations bootstrap

开始金刚

docker run -d --name kong \
--network=kong-net \
--link kong-database:kong-database \
-e "KONG_DATABASE=postgres" \
-e "KONG_PG_HOST=kong-database" \
-e "KONG_PG_PASSWORD=kong" \
-e "KONG_PROXY_ACCESS_LOG=/dev/stdout" \
-e "KONG_ADMIN_ACCESS_LOG=/dev/stdout" \
-e "KONG_PROXY_ERROR_LOG=/dev/stderr" \
-e "KONG_ADMIN_ERROR_LOG=/dev/stderr" \
-e "KONG_ADMIN_LISTEN=0.0.0.0:8001, 0.0.0.0:8444 ssl" \
-p 8000:8000 \
-p 8443:8443 \
-p 8001:8001 \
-p 8444:8444 \
kong