【发布时间】：2021-09-11 08:47:08
【问题描述】：
我有一个 linux postgres 数据库在我的 localhost 上的 5432 端口上运行。我的机器网卡的 IP 是 192.168.68.80。我的 postgres 配置文件如下所示：
/etc/postgresql/13/main/postgresql.conf
listen_addresses = '*'
/etc/postgresql/13/main/pg_hba.conf
host all all 0.0.0.0/0 md5
host all all ::/0 md5
现在我想从在 docker 容器中运行的 Node 应用程序连接到这个数据库。这是我的环境变量文件加载到 Node 时的样子：
.env
PGHOST=localhost // Host of the postgres db server
PGPORT=5432 // Port of the postgres db
完成此设置后，我使用我的 docker 文件构建我的 docker 映像。然后我尝试在 linux 上使用以下命令将 dockerfile 作为容器运行：
sudo docker run --network="host" --env-file .env -p 3000:3000 repo:tag
应用程序开始运行，并在端口 3000 上侦听连接。但每当我尝试连接到应用程序时，应用程序无法连接到 postgres 数据库服务器并给出以下错误：
/node_modules/sequelize/lib/dialects/postgres/connection-manager.js:172
reject(new sequelizeErrors.ConnectionRefusedError(err));
^
ConnectionRefusedError [SequelizeConnectionRefusedError]: connect ECONNREFUSED 127.0.0.1:5432
at Client._connectionCallback (/node_modules/sequelize/lib/dialects/postgres/connection-manager.js:172:24)
at Client._handleErrorWhileConnecting (/node_modules/pg/lib/client.js:305:19)
at Client._handleErrorEvent (/node_modules/pg/lib/client.js:315:19)
at Connection.emit (node:events:394:28)
at Socket.reportStreamError (/node_modules/pg/lib/connection.js:52:12)
at Socket.emit (node:events:394:28)
at emitErrorNT (node:internal/streams/destroy:193:8)
at emitErrorCloseNT (node:internal/streams/destroy:158:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
parent: Error: connect ECONNREFUSED 127.0.0.1:5432
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1133:16) {
errno: -111,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5432
},
original: Error: connect ECONNREFUSED 127.0.0.1:5432
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1133:16) {
errno: -111,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5432
}
}
我无法弄清楚为什么连接被拒绝，因为它似乎应该能够连接。
编辑：
我当前的 ip 表以防万一：
user$ sudo iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
DOCKER-USER all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-1 all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain DOCKER (2 references)
target prot opt source destination
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
target prot opt source destination
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-ISOLATION-STAGE-2 (2 references)
target prot opt source destination
DROP all -- anywhere anywhere
DROP all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-USER (1 references)
target prot opt source destination
RETURN all -- anywhere anywhere
【问题讨论】：
标签： node.js postgresql docker networking