我是Docker Compose的新手，我正在尝试获取两个图像（一个是Node应用程序，另一个是Neo4j db），可以在本地协同工作。我的操作系统是Ubuntu。虽然每个图像分别工作正常，但我无法将Node应用程序图像连接到数据库图像。
我几乎肯定与端口连接有关;确切地说，使用我在驱动程序连接中使用的URL参数：
var driver = neo4j.driver("bolt://neo4j:7687", neo4j.auth.basic("tester", "tester"));
其中“7687”是Docker-compose.yml中的Neo4j的Bolt端口，“neo4j”是我分配给Neo4j图像的名称（见下文）。
我正在关注（使用不同的JS驱动程序）我能找到的唯一Node + Neo4j + Docker教程（https://medium.com/@slavahatnuke/neo4j-node-js-docker-docker-compose-fdc1cc9cf405），用户注释似乎确认错误在我的连接URL中。< / p>
尝试总结：
"use strict";
var express = require('express');
var neo4j = require('neo4j-driver').v1;
const PORT = 8080;
var app = express();
//below is a test of the Neo4j connection, with which I have trouble connecting from in a Docker container
router.get('/test', function (req, res) {
var driver = neo4j.driver("bolt://neo4j:7687", neo4j.auth.basic("tester", "tester"));
var session = driver.session();
console.log(session);
var countPromise = session.readTransaction(function(transaction) {
var result = transaction.run("MATCH (n) RETURN COUNT(n) AS c")
.then(function(result) {
console.log(result);
return result.records[0].get("c");
});
return result;
});
countPromise.then(function(result) {
res.json(result);
session.close();
driver.close();
});
});
app.listen(PORT);
console.log("Running on " + PORT);
module.exports = app;
Neo4j图像是Docker的官方Neo4j图像。
我使用的是以下docker-compose.yml文件：
nodeapp: image: node:latest volumes: - ./nodeapp:/nodeapp links: - neo4j ports: - "18080:8080" working_dir: /nodeapp entrypoint: node index.js neo4j: image: neo4j ports: - "17474:7474" - "17687:7687" volumes: - ./db/dbms:/data/dbms
当我运行它时（使用“docker-compose up”），我可以：
一个。通过将浏览器指向：“localhost：17474”，可以正常访问Neo4j浏览器控制台。我使用提供的用户凭据登录，可以正常运行Cypher查询。
B中。如果我不尝试创建Neo4j驱动程序，我可以通过将浏览器指向“localhost：18080”来运行Node中的任何常规GET函数。
℃。输出显示以下内容：“在0.0.0.0:7687上启用螺栓。”
所以我一直专注于Node中的连接URL。
但它还没有连接。具体来说，根据日志，程序只是继续尝试并且无法创建驱动程序（它不断重复“这是一个Neo4j连接测试”这一行。）
我确信Docker Compose有一些简单的东西，我错过了。
没有Docker，我使用URL“bolt：// localhost：7687”将应用程序成功连接到数据库。现在它在Docker中，我不知道应该使用什么。
感谢您提供任何指导。
更新：
我担心这些建议都没有奏效。
以下是一些更多信息：
Name Command State Ports
-------------------------------------------------------------------------
initialnode_neo4 /docker- Up 7473/tcp, 0.0.0.
j_1 entrypoint.sh 0:17474->7474/tc
neo4j p, 0.0.0.0:17687
->7687/tcp
initialnode_node node index.js Up 0.0.0.0:18080->8
app_1 080/tcp
"NetworkMode": "default",
"PortBindings": {
"7474/tcp": [
{
"HostIp": "",
"HostPort": "17474"
}
],
"7687/tcp": [
{
"HostIp": "",
"HostPort": "17687"
}
]
},
...
"ExposedPorts": {
"7473/tcp": {},
"7474/tcp": {},
"7687/tcp": {}
},
...
"NetworkSettings": {
"Bridge": "",
"SandboxID": "5eb2b7805cc802391c08be8c85cdbb19fd42de6cc794e76e57f5214c6763c140",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"7473/tcp": null,
"7474/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "17474"
}
],
"7687/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "17687"
}
]
},
...
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "8ffa640b707301bb9b8b6c2a1cfb6f5deac8c1a5f5de9e9de0976697b01027ef",
"EndpointID": "941911b65cf0b714fa13ac45ca967478a513fe5c282283aa0bfe20afcc0df06f",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
...
{"log":" _writeConnectionHolder: \n","stream":"stdout","time":"2017-05-05T16:20:59.37931736Z"}
{"log":" ConnectionHolder {\n","stream":"stdout","time":"2017-05-05T16:20:59.379324034Z"}
{"log":" _mode: 'WRITE',\n","stream":"stdout","time":"2017-05-05T16:20:59.379330305Z"}
{"log":" _connectionProvider: \n","stream":"stdout","time":"2017-05-05T16:20:59.379353139Z"}
{"log":" DirectConnectionProvider {\n","stream":"stdout","time":"2017-05-05T16:20:59.379363823Z"}
{"log":" _address: 'neo4j:7687',\n","stream":"stdout","time":"2017-05-05T16:20:59.3793706Z"}
{"log":" _connectionPool: [Object],\n","stream":"stdout","time":"2017-05-05T16:20:59.379377162Z"}
{"log":" _driverOnErrorCallback: [Function: bound _driverOnErrorCallback] },\n","stream":"stdout","time":"2017-05-05T16:20:59.379384507Z"}
{"log":" _referenceCount: 0,\n","stream":"stdout","time":"2017-05-05T16:20:59.379391793Z"}
{"log":" _connectionPromise: Promise { null } },\n","stream":"stdout","time":"2017-05-05T16:20:59.379398668Z"}
{"log":" _open: true,\n","stream":"stdout","time":"2017-05-05T16:20:59.379405771Z"}
{"log":" _hasTx: false,\n","stream":"stdout","time":"2017-05-05T16:20:59.379412739Z"}
{"log":" _lastBookmark: undefined,\n","stream":"stdout","time":"2017-05-05T16:20:59.379437046Z"}
{"log":" _transactionExecutor: \n","stream":"stdout","time":"2017-05-05T16:20:59.379445641Z"}
{"log":" TransactionExecutor {\n","stream":"stdout","time":"2017-05-05T16:20:59.379452547Z"}
{"log":" _maxRetryTimeMs: 30000,\n","stream":"stdout","time":"2017-05-05T16:20:59.379459251Z"}
{"log":" _initialRetryDelayMs: 1000,\n","stream":"stdout","time":"2017-05-05T16:20:59.379466191Z"}
{"log":" _multiplier: 2,\n","stream":"stdout","time":"2017-05-05T16:20:59.379472573Z"}
{"log":" _jitterFactor: 0.2,\n","stream":"stdout","time":"2017-05-05T16:20:59.379478888Z"}
{"log":" _inFlightTimeoutIds: [] } }\n","stream":"stdout","time":"2017-05-05T16:20:59.379485201Z"}
{"log":"(node:1) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: Connection was closed by server\n","stream":"stderr","time":"2017-05-05T16:21:32.301674097Z"}
我有一个能够连接的同事，但他不得不使用粗略的第三方库，他无法通过Bolt连接，只有7474。
答案 0 :(得分：0)
尝试：var driver = neo4j.driver("bolt://neo4j:7687", neo4j.auth.basic("neo4j", "neo4j"));
端口应为7687，登录凭据为默认值，除非您在启动容器后手动更改了这些凭据。
还有一件事，neo4j需要几秒钟才能启动，所以如果你试图立即连接，很可能连接失败。
答案 1 :(得分：0)
问题似乎是由于我的个人计算机设置，这解释了为什么没有其他人遇到此问题。
我有一个本地版本的Neo4j正在运行，除了 Docker Neo4j图像外，他们都使用相同的端口。
这导致连接被拒绝。
我的解决方案是：