我试图使用sam local invoke调用我的Lambda函数，但发现它无法连接到我的主机MySQL。我尝试添加--docker-network host但它也无法连接
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/docker/api/client.py", line 229, in _raise_for_status
response.raise_for_status()
File "/usr/lib/python3.6/site-packages/requests/models.py", line 935, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: http+docker://localhost/v1.35/networks/6ad3bd87e8437e8410145d169a4edf68d1b0247a67257ce7dd1208dac3664c82/connect
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/bin/sam", line 11, in <module>
load_entry_point('aws-sam-cli==0.5.0', 'console_scripts', 'sam')()
File "/usr/lib/python3.6/site-packages/click/core.py", line 722, in __call__
return self.main(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/lib/python3.6/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/click/decorators.py", line 64, in new_func
return ctx.invoke(f, obj, *args[1:], **kwargs)
File "/usr/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/samcli/commands/local/invoke/cli.py", line 47, in cli
docker_network, log_file, skip_pull_image, profile) # pragma: no cover
File "/usr/lib/python3.6/site-packages/samcli/commands/local/invoke/cli.py", line 79, in do_cli
stderr=context.stderr)
File "/usr/lib/python3.6/site-packages/samcli/commands/local/lib/local_lambda.py", line 80, in invoke
stdout=stdout, stderr=stderr)
File "/usr/lib/python3.6/site-packages/samcli/local/lambdafn/runtime.py", line 83, in invoke
self._container_manager.run(container)
File "/usr/lib/python3.6/site-packages/samcli/local/docker/manager.py", line 61, in run
container.create()
File "/usr/lib/python3.6/site-packages/samcli/local/docker/container.py", line 115, in create
network.connect(self.id)
File "/usr/lib/python3.6/site-packages/docker/models/networks.py", line 57, in connect
container, self.id, *args, **kwargs
File "/usr/lib/python3.6/site-packages/docker/utils/decorators.py", line 19, in wrapped
return f(self, resource_id, *args, **kwargs)
File "/usr/lib/python3.6/site-packages/docker/api/network.py", line 248, in connect_container_to_network
self._raise_for_status(res)
File "/usr/lib/python3.6/site-packages/docker/api/client.py", line 231, in _raise_for_status
raise create_api_error_from_http_exception(e)
File "/usr/lib/python3.6/site-packages/docker/errors.py", line 31, in create_api_error_from_http_exception
raise cls(e, response=response, explanation=explanation)
docker.errors.APIError: 400 Client Error: Bad Request ("container cannot be disconnected from host network or connected to host network")
我注意到最后一行：
docker.errors.APIError：400客户端错误：错误请求（“容器无法与主机网络断开连接或连接到主机网络”）
我该如何解决？
我不能说为什么--docker-network host会产生这个错误，但我认为你不需要它。我可以从SAM本地连接到本地计算机上运行的MySQL，无需任何网络覆盖。
我这样做只需使用我的本地IP（而不是localhost或127.0.0.1）来连接数据库。
以下lambda函数连接到我的本地MySQL就好了，只要我使用我的本地IP，就像ipconfig这样的工具。
'use strict';
var mysql = require('mysql');
var connection = mysql.createConnection({
host : '192.168.1.6',
user : 'mike',
password : 'password',
database : 'logtest'
});
module.exports.hello = (event, context, callback) => {
connection.connect();
connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
if (error) throw error;
console.log('The solution is: ', results[0].solution);
const response = {
statusCode: 200,
body: JSON.stringify({solution: results[0].solution})
};
connection.end();
callback(null, response);
});
};
部分ipconfig输出：
Ethernet adapter Local Area Connection 6:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::95c2:495c:7226:8ac2%39
IPv4 Address. . . . . . . . . . . : 10.251.19.6
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::496a:d34d:8380:3b1c%15
IPv4 Address. . . . . . . . . . . : 192.168.1.6
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
在这种情况下，我的lambda函数可以使用10.251.19.6或192.168.1.6连接到本地MySQL。
最小的example here。
您可以按如下方式检查案例：
如果您在Mac上运行，您应该能够在将主机名传递给进行呼叫的容器中的休息客户端时在本地使用特殊主机名。它将绘制出所需的--docker-network标志
url = "http://docker.for.mac.localhost:3306"
或者在较新的docker https://docs.docker.com/docker-for-mac/release-notes/#docker-community-edition-17120-ce-mac49-2018-01-19上安装
url = "http://docker.for.mac.host.internal:3306"
如果你不是在Mac上并且在启动mysql容器时执行--docker-network方法，它应该看起来像这样。
docker run -d -v "$PWD":/var/lib/mysql -p 3306:3306 \
--network lambda-local \
--name mysql \
mysql
然后在本地调用
sam local invoke --docker-network lambda-local
也许你错过了第一部分？你能发布一下如何在本地启动mysql容器吗？