Docker API不能应用json过滤器 [英] Docker API can’t apply json filters
问题描述
根据 https：// docs。 docker.com/engine/reference/api/docker_remote_api_v1.24/#/list-tasks ，过滤器只能用于获取运行具有特定服务名称的容器。由于某些原因，我将获得所有任务的完整列表，无论其名称或所需状态如何。我找不到使用带有Docker API的JSON请求的curl的正确示例。
我使用以下命令：
A）
curl -X GET -HContent-Type：application / json-d{filters：[{service：demo，desired-state：running}]}' https：// HOSTNAME：2376 / tasks --cert〜/ .docker / cert.pem --key〜/ .docker /key.pem --cacert〜/ .docker / ca.pem
返回一切
B）
试图通过 Docker远程API过滤器退出工作
curl https：// HOSTNAME：2376 / containers / json？all = 1& filters = {％22status％22：[％22exited％22]} --cert〜/ .docker /cert.pem --key〜/ .docker / key.pem --cacert〜/ .docker / ca.pem
一个返回卷曲： （60）同行证书发行人不被承认，所以我猜卷曲请求是错误的。
我已经问过Docker论坛，他们帮了一会儿。我很惊讶，互联网上没有适当的文档，关于如何使用Docker API卷曲，或者是如此明显，我不明白什么？
我应该以这个事实为前提，我从来没有看到卷曲错误地报告证书错误，实际上还有一些其他的问题，但我会相信你的说法，这是实际上不是证书问题。
我以为先前认为你对过滤器的论证是不正确的，因为
根据 API参考， 过滤器参数是...
过滤器的JSON编码值（a map [string] [] string）在容器列表中进行处理。
我不太清楚如何解释地图[字符串] []串，所以我在我的Docker客户端和服务器之间设置一个日志代理，并运行 docker ps -f status = exited ，产生以下请求：
GET /v1.24/containers/json?filters=%7B%22status%22%3A%7B%22exited%22%3Atrue%7D%7D HTTP /如果我们将参数解码为过滤器
$ c>，我们看到它是：
{status：{退出：true}}
而您正在传递：
code> {status：[exited]}
，而且我假设这是问题的根源...但是当试图验证这个问题时，我遇到了一个好奇的问题。我不能以书面方式运行您的 curl 命令行，因为curl试图执行一些globbing行为由于大括号：
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ （3）列中的[globbing]嵌套括号
如果我正确引用你的参数过滤： / p>
$ python -c'import urllib; print urllib.quote（{status：[exited]}）'
％7B％22状态％22％3A％5B％22有效％22％5D％7D
似乎工作正常：
$ curl http：// localhost：2376 / containers / json'？filters =％7B％22status％22％3A％5B％22exited％22％5D％7D'
[{Id ：...
如果我使用您的原始表达式并通过 -g （aka - globoff ）以禁用大括号扩展：
$ curl -g http：// localhost：2376 / containers / json'？filters = {％22status％22：[％22exited％22]}'
[ {Id：...
我想强调的一件事是坚持使用docker客户端和服务器之间的代理。如果你发现自己在问：如何使用这个API？，一个很好的答案就是看看Docker客户端在同样的情况下正在做什么。
According to the https://docs.docker.com/engine/reference/api/docker_remote_api_v1.24/#/list-tasks, filter can be only used to get running containers with a particular service name. For some reason, I am getting a full list of all tasks regardless of their names or desired states. I can't find any proper examples of using curl with JSON requests with Docker API. I'm using the following command:
A)
curl -X GET -H "Content-Type: application/json" -d '{"filters":[{ "service":"demo", "desired-state":"running" }]}' https://HOSTNAME:2376/tasks --cert ~/.docker/cert.pem --key ~/.docker/key.pem --cacert ~/.docker/ca.pem
Returns everything
B) trying to get something working from Docker Remote API Filter Exited
curl https://HOSTNAME:2376/containers/json?all=1&filters={%22status%22:[%22exited%22]} --cert ~/.docker/cert.pem --key ~/.docker/key.pem --cacert ~/.docker/ca.pem
This one returns "curl: (60) Peer's Certificate issuer is not recognized.", so I guess that curl request is malformed.
I have asked on Docker forums and they helped a little. I'm amazed that there are no proper documentation anywhere on the internet on how to use Docker API with curl or is it so obvious and I don't understand something?
I should prefix this with the fact that I have never seen curl erroneously report a certificate error when in fact there was some sort of other issue in play, but I will trust your assertion that this is in fact not a certificate problem.
I thought at first that your argument to filters was incorrect, because
according to the API reference, the filters parameter is...
a JSON encoded value of the filters (a map[string][]string) to process on the containers list.
I wasn't exactly sure how to interpret map[string][]string, so I set up a logging proxy between my Docker client and server and ran docker ps -f status=exited, which produced the following request:
GET /v1.24/containers/json?filters=%7B%22status%22%3A%7B%22exited%22%3Atrue%7D%7D HTTP/1.1\r
If we decode the argument to filters, we see that it is:
{"status":{"exited":true}}
Whereas you are passing:
{"status":["exited"]}
So that's different, obviously, and I was assuming that was the source of the problem...but when trying to verify that, I ran into a curious problem. I can't even run your curl command line as written, because curl tries to perform some globbing behavior due to the braces:
$ curl http://localhost:2376/containers/json'?filters={%22status%22:[%22exited%22]}'
curl: (3) [globbing] nested brace in column 67
If I correctly quote your arguments to filter:
$ python -c 'import urllib; print urllib.quote("""{"status":["exited"]}""")'
%7B%22status%22%3A%5B%22exited%22%5D%7D
It seems to work just fine:
$ curl http://localhost:2376/containers/json'?filters=%7B%22status%22%3A%5B%22exited%22%5D%7D'
[{"Id":...
I can get the same behavior if I use your original expression and pass -g (aka --globoff) to disable the brace expansion:
$ curl -g http://localhost:2376/containers/json'?filters={%22status%22:[%22exited%22]}'
[{"Id":...
One thing I would like to emphasize is the utility of sticking a proxy between the docker client and server. If you ever find yourself asking, "how do I use this API?", an excellent answer is to see exactly what the Docker client is doing in the same situation.
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