问题描述
我正在尝试使用GitHub Codespaces，尝试使用Node和Postgres启动应用程序。
我选择了以下选项：
产生了以下<?xml version="1.0"?><class><<abc att="da"/></class>
：
devcontainer.json和// Update the VARIANT arg in docker-compose.yml to pick a Node.js version: 10,12,14
{
"name": "Node.js & Postgresql","dockerComposeFile": "docker-compose.yml","service": "app","workspaceFolder": "/workspace",// Set *default* container specific settings.json values on container create.
"settings": {
"terminal.integrated.shell.linux": "/bin/bash","sqltools.connections": [{
"name": "Container database","driver": "Postgresql","previewLimit": 50,"server": "localhost","port": 5432,"database": "postgres","username": "postgres","password": "postgres"
}]
},// Add the IDs of extensions you want installed when the container is created.
"extensions": [
"dbaeumer.vscode-eslint","mtxr.sqltools","mtxr.sqltools-driver-pg"
]
// Use 'forwardPorts' to make a list of ports inside the container available locally.
// "forwardPorts": [3000,5432],// Use 'postCreateCommand' to run commands after the container is created.
// "postCreateCommand": "yarn install",// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
// "remoteUser": "node"
}
：
docker-compose.yml我的version: '3'
services:
app:
build:
context: .
dockerfile: Dockerfile
args:
# [Choice] Node.js version: 14,10
VARIANT: 14
# On Linux,you may need to update USER_UID and USER_GID below if not your local UID is not 1000.
USER_UID: 1000
USER_GID: 1000
volumes:
- ..:/workspace:cached
# Overrides default command so things don't shut down after the process ends.
command: sleep infinity
# Runs app on the same network as the database container,allows "forwardPorts" in devcontainer.json function.
network_mode: service:db
# Uncomment the next line to use a non-root user for all processes.
# user: node
# Use "forwardPorts" in **devcontainer.json** to forward an app port locally.
# (Adding the "ports" property to this file will not forward from a Codespace.)
db:
image: postgres:latest
restart: unless-stopped
volumes:
- postgres-data:/var/lib/postgresql/data
environment:
POSTGRES_PASSWORD: postgres
POSTGRES_USER: postgres
POSTGRES_DB: postgres
# Add "forwardPorts": ["5432"] to **devcontainer.json** to forward MongoDB locally.
# (Adding the "ports" property to this file will not forward from a Codespace.)
volumes:
postgres-data:
如下：
package.json我的{
"dependencies": {
"pg": "^8.4.2"
},"scripts": {
"start": "node index.js"
}
}
就像这样：
index.js运行const { Pool } = require("pg")
const db = new Pool()
db.query(`CREATE TABLE IF NOT EXISTS testing(id SERIAL PRIMARY KEY);`)
会产生以下错误：
yarn start这使我相信Postgres实例未在代码空间内启动并运行。
我尝试取消注释有关转发端口的这一行：
codespace ➜ ~/workspace/codespace-demo (main ✗) $ yarn start
yarn run v1.17.3
warning package.json: No license field
$ node index.js
(node:1037) UnhandledPromiseRejectionWarning: Error: connect ECONNREFUSED 127.0.0.1:5432
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16)
(node:1037) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block,or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection,use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:1037) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future,promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Done in 0.11s.
但那里没有运气。
关于Docker组件如何适合在这里玩，我可能会缺少一些见识，但是如果有人可以指出我正确的方向，我会喜欢的！
解决方法
我能够做到两点。
-
仅添加包含文件的
.devcontainer是不够的。您需要提交更改，推送更改，删除代码空间，然后创建一个新更改以反映更改。 -
在
.devcontainer/docker-compose.yml内，我已将行network_mode: host添加到db服务中。根据此线程，此要求将很快删除，但现在需要：https://github.community/t/cant-connect-to-postgres/142655/2?u=andyweiss1982