我正在尝试创建 docker swarm 服务，但出现了一些奇怪的行为:
对于某些图像，它是成功的，对于某些图像，我收到错误:
docker 服务创建 nginx
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总体进度:1 出 1 任务
1/1:运行[============================================= ======>]
验证:服务融合 --> 成功
docker 服务创建 hello-world
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总体进度:0/1 任务
1/1:准备[=================================>]
verify: 检测到任务失败 --> 失败
供您引用:docker pull hello-world 工作正常。
我的印象是我们可以在所有图像上创建服务，是否有任何条款和条件？我错过了什么吗？
注意:这是基本部分，但我的主要目的是为本地注册表镜像创建服务。但是在调试发现问题的第一步，即 hello-world。
最佳答案
它失败了，因为从 hello-world Docker 镜像创建的容器只显示一条消息然后退出，而且这种情况很快发生。
而且由于您创建了一个 swarm 服务，它会在每次失败时继续重新创建容器，这是意料之中的，这就是服务似乎失败的原因。
请查看下面的服务日志，您会看到容器不断被重新创建:
[ ~]$ docker service create --name helloworld hello-world iilsd1yc706zgcdg35l8sdz3z
Since --detach=false was not specified, tasks will be created in the background.
In a future release, --detach=false will become the default.
[ ~]$ docker service logs helloworld -f
helloworld.1.jxxnqzximfy7@ |
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.jxxnqzximfy7@ | Hello from Docker!
helloworld.1.zwyhf6x4cpdm@ | Hello from Docker!
helloworld.1.jxxnqzximfy7@ | This message shows that your installation appears to be working correctly.
helloworld.1.zwyhf6x4cpdm@ | This message shows that your installation appears to be working correctly.
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.jxxnqzximfy7@ |
helloworld.1.jxxnqzximfy7@ | To generate this message, Docker took the following steps:
helloworld.1.zwyhf6x4cpdm@ | To generate this message, Docker took the following steps:
helloworld.1.zwyhf6x4cpdm@ | 1. The Docker client contacted the Docker daemon.
helloworld.1.jxxnqzximfy7@ | 1. The Docker client contacted the Docker daemon.
helloworld.1.jxxnqzximfy7@ | 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
helloworld.1.zwyhf6x4cpdm@ | 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
helloworld.1.zwyhf6x4cpdm@ | (amd64)
helloworld.1.jxxnqzximfy7@ | (amd64)
helloworld.1.zwyhf6x4cpdm@ | 3. The Docker daemon created a new container from that image which runs the
helloworld.1.jxxnqzximfy7@ | 3. The Docker daemon created a new container from that image which runs the
helloworld.1.jxxnqzximfy7@ | executable that produces the output you are currently reading.
helloworld.1.zwyhf6x4cpdm@ | executable that produces the output you are currently reading.
helloworld.1.zwyhf6x4cpdm@ | 4. The Docker daemon streamed that output to the Docker client, which sent it
helloworld.1.jxxnqzximfy7@ | 4. The Docker daemon streamed that output to the Docker client, which sent it
helloworld.1.jxxnqzximfy7@ | to your terminal.
helloworld.1.zwyhf6x4cpdm@ | to your terminal.
helloworld.1.jxxnqzximfy7@ |
helloworld.1.jxxnqzximfy7@ | To try something more ambitious, you can run an Ubuntu container with:
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.zwyhf6x4cpdm@ | To try something more ambitious, you can run an Ubuntu container with:
helloworld.1.jxxnqzximfy7@ | $ docker run -it ubuntu bash
helloworld.1.jxxnqzximfy7@ |
helloworld.1.zwyhf6x4cpdm@ | $ docker run -it ubuntu bash
helloworld.1.jxxnqzximfy7@ | Share images, automate workflows, and more with a free Docker ID:
helloworld.1.jxxnqzximfy7@ | https://hub.docker.com/
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.zwyhf6x4cpdm@ | Share images, automate workflows, and more with a free Docker ID:
helloworld.1.jxxnqzximfy7@ |
helloworld.1.zwyhf6x4cpdm@ | https://hub.docker.com/
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.jxxnqzximfy7@ | For more examples and ideas, visit:
helloworld.1.jxxnqzximfy7@ | https://docs.docker.com/get-started/
helloworld.1.zwyhf6x4cpdm@ | For more examples and ideas, visit:
helloworld.1.jxxnqzximfy7@ |
helloworld.1.zwyhf6x4cpdm@ | https://docs.docker.com/get-started/
helloworld.1.zwyhf6x4cpdm@ |
helloworld.1.yw17ktyymrp6@ |
helloworld.1.yw17ktyymrp6@ | Hello from Docker!
helloworld.1.yw17ktyymrp6@ | This message shows that your installation appears to be working correctly.
您应该尝试使用不同的 Docker 镜像，例如 busybox:
[~]$ docker service create --name helloworld busybox:latest sh -c "while true; do echo Hello; sleep 2; done"
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Since --detach=false was not specified, tasks will be created in the background.
In a future release, --detach=false will become the default.
[~]$ docker service ps helloworld --no-trunc
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
33xe78ekfjkmti8yahrcp5gug helloworld.1 busybox:latest@sha256:2a03a6059f21e150ae84b0973863609494aad70f0a80eaeb64bddd8d92465812 Running Running 1 second ago
[~]$ docker service logs -f helloworld
helloworld.1.33xe78ekfjkm@ | Hello
helloworld.1.33xe78ekfjkm@ | Hello
helloworld.1.33xe78ekfjkm@ | Hello
helloworld.1.33xe78ekfjkm@ | Hello
helloworld.1.33xe78ekfjkm@ | Hello
^C
关于docker - 在创建 docker 服务时检测到某些图像的任务失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53222530/