我正在使用docker进行构建和测试。在测试期间，我的测试用例将启动一个单独的进程（mongod进程），在测试用例完成后，它将终止该进程。在整个测试用例运行时，mongod进程将生成并多次终止。我遇到的问题是当mongod进程被杀死时，docker容器以代码137退出。我的docker文件如下：
FROM ubuntu
RUN sed -i -e 's/us.archive.ubuntu.com/archive.ubuntu.com/g' /etc/apt/sources.list && apt-get update && apt-get install -y curl
RUN apt-get update && apt-get install -y --no-install-recommends \
openssh-client openssh-server rsync vim \
dh-autoreconf libcurl4-gnutls-dev libexpat1-dev gettext libz-dev libssl-dev \
&& curl -OL https://github.com/git/git/archive/v2.13.1.tar.gz \
&& tar -zxf v2.13.1.tar.gz && cd git-2.13.1 && make configure && ./configure --prefix=/usr && make all && make install && cd .. \
&& apt-get remove -y dh-autoreconf libcurl4-gnutls-dev libexpat1-dev gettext libz-dev libssl-dev \
&& rm -rf v2.13.1.tar.gz git-2.13.1 \
&& rm -rf /var/lib/apt/lists/*
RUN echo "unsafe-perm = true" > /root/.npmrc \
&& echo "Australia/Melbourne" > /etc/timezone
# && dpkg-reconfigure -f noninteractive tzdata
RUN curl -sL https://deb.nodesource.com/setup_7.x | bash - && apt-get install -y nodejs && npm install -g yarn
RUN apt-get update && apt-get install -y --no-install-recommends \
build-essential \
python \
python-pip python-dev \
&& rm -rf /var/lib/apt/lists/* \
&& yarn global add node-gyp && pip install --upgrade pip && pip install setuptools
RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6 \
&& echo "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.4 main" | tee /etc/apt/sources.list.d/mongodb-org-3.4.list
RUN apt-get update && apt-get install -y --no-install-recommends \
mongodb-org \
python-pip python-dev \
&& pip install mtools pymongo numpy \
&& rm -rf /var/lib/apt/lists/*
USER root
RUN adduser jenkins
RUN chmod 777 /home/jenkins
ADD ./.aws /home/jenkins/.aws
USER jenkins
我使用下面的命令启动mongod进程：
mongod --dbpath /home/jenkins/.jenkins/data/db --logpath /home/jenkins/.jenkins/data/mongod.log --port 27017 --logappend --fork
我在本地运行项目测试用例没有问题。所以我认为这与docker有关。我的docker正在CoreOS中运行。版本是：
$ docker --version
Docker version 17.05.0-ce, build 89658be
此容器由jenkins docker slave插件启动。经过一些调查后，如果我通过docker run -it -d $NAME bash手动启动容器，它可以正常工作，但如果容器由Jenkins docker slave启动则无效。我想知道哪个启动命令可能会导致此问题。如何在不更改docker launcher命令的情况下解决此问题？
以下是docker inspect输出：
[
{
"Id": "81ffad4b15115077dda23c221eb8053915f41cdf0e75de4417d23f81df12f87f",
"Created": "2017-07-28T01:08:40.598084613Z",
"Path": "/trampoline",
"Args": [
"wait"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 14152,
"ExitCode": 0,
"Error": "",
"StartedAt": "2017-07-28T01:08:41.044051569Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:7d1e60ecf32337654f46c54b05e3db11f724f12c4f879ccd42c9566c59edc6b2",
"ResolvConfPath": "/var/lib/docker/containers/097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39/hostname",
"HostsPath": "/var/lib/docker/containers/097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39/hosts",
"LogPath": "/var/lib/docker/containers/81ffad4b15115077dda23c221eb8053915f41cdf0e75de4417d23f81df12f87f/81ffad4b15115077dda23c221eb8053915f41cdf0e75de4417d23f81df12f87f-json.log",
"Name": "/heuristic_ritchie",
"RestartCount": 0,
"Driver": "overlay2",
"MountLabel": "system_u:object_r:svirt_lxc_file_t:s0:c896,c995",
"ProcessLabel": "system_u:system_r:svirt_lxc_net_t:s0:c896,c995",
"AppArmorProfile": "",
"ExecIDs": [
"a827e4666391224dc9b3e7f94ea3a7615fb5215c82de6a481289fa125bf9495f"
],
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "container:097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": [
"097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39"
],
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "container:097e51587d94fa0282ee51f6b84c006a6a410aadb2891f24b25caf41a1d14f39",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": [
"label=user:system_u",
"label=role:system_r",
"label=type:svirt_lxc_net_t",
"label=level:s0:c896,c995"
],
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 4294967296,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 8589934592,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/bf2b1c63a0862bcc09c3a126e41b6658b60178ade943a8844780a24b01cf2f7c-init/diff:/var/lib/docker/overlay2/be89c1495150690fd934ba56411d144f7de43d06d268fe4b2d0e12552bab6b31/diff:/var/lib/docker/overlay2/d222b270a29034ff81603a80776dd05a259369dcb721515bb2ad08039e9327f1/diff:/var/lib/docker/overlay2/0f1c10959b14c67f2776cd5696a8281f514a42505ec2e0aab759f8543f0e6eed/diff:/var/lib/docker/overlay2/adfec4e3f9b8b1252520f8a56ee27d4cf5fb3f3a01dae344c9932f5bda7d732f/diff:/var/lib/docker/overlay2/e350f5d2bcc4252a5f067eb72b5ad65c6c620178347373736e1308c35e0a17d3/diff:/var/lib/docker/overlay2/2ed71b40ecf304222f071b0ccfc14f10dbd7566de01d16ff80169dea80dd72d4/diff:/var/lib/docker/overlay2/1b20e86eb201191ce6fd4d904f1bfd95fe3423bd6d083cd763c7995a518c9e23/diff:/var/lib/docker/overlay2/35c6c2859ec66d741643c7f9ff47e8513504e7560ea63369f671b305a66edaa1/diff:/var/lib/docker/overlay2/50e277363a9f73f105e6a60edb47c257b04f8383e4575e0cb67e6d628148c305/diff:/var/lib/docker/overlay2/3163f8c2fc0c94623b3390178b5d9de9938d2e9399df0f0341384f8d0fc75761/diff:/var/lib/docker/overlay2/1dc179342c7786f88e98fd68f72dcb187d8524b203ce6122158cf68d94df3a3a/diff:/var/lib/docker/overlay2/f3f749adb1ea12915a0bc1b6258682cbf7571288656325152784b02039b56fd1/diff:/var/lib/docker/overlay2/deb0c7c423d5f685db5213536810c71fae89fee553d830f6a7cfba3b29853097/diff",
"MergedDir": "/var/lib/docker/overlay2/bf2b1c63a0862bcc09c3a126e41b6658b60178ade943a8844780a24b01cf2f7c/merged",
"UpperDir": "/var/lib/docker/overlay2/bf2b1c63a0862bcc09c3a126e41b6658b60178ade943a8844780a24b01cf2f7c/diff",
"WorkDir": "/var/lib/docker/overlay2/bf2b1c63a0862bcc09c3a126e41b6658b60178ade943a8844780a24b01cf2f7c/work"
},
"Name": "overlay2"
},
"Mounts": [
{
"Name": "46705245e5a0a71c14665c843a34ee349f19b4cc0efeed655e9b3575b0b83a3d",
"Source": "/var/lib/docker/volumes/46705245e5a0a71c14665c843a34ee349f19b4cc0efeed655e9b3575b0b83a3d/_data",
"Destination": "/home/jenkins/.jenkins",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
"Config": {
"Hostname": "097e51587d94",
"Domainname": "",
"User": "10000:10000",
"AttachStdin": false,
"AttachStdout": true,
"AttachStderr": true,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"TMPDIR=/home/jenkins/.jenkins/.tmp",
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NPM_CONFIG_LOGLEVEL=info",
"NODE_VERSION=7.10.0",
"YARN_VERSION=0.24.4"
],
"Cmd": [
"/trampoline",
"wait"
],
"Image": "jenkins-mongo-3.4",
"Volumes": null,
"WorkingDir": "/home/jenkins/.jenkins",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"maintainer": "zhaoyi0113@gmail.com"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {}
}
}
]
答案 0 :(得分：1)
不使用mongod进程作为pid1，而是使用supervisor。
所以使用supervisor启动mongodb（如果需要它，你的测试本身并不真正开始）。
这样，您的测试可以使用以下方式轻松启动/停止该过程：
supervisorctl stop mongod并使用supervisorctl start mongod
停止mongod服务不会退出容器，因为supervisord是pid1
如果您希望测试专门使用二进制文件启动它，并且您不需要pid跟踪和连接，则可以使用busyscript作为pid，然后使用测试在容器中启动mongod进程。
busyscript看起来像这样
#!/bin/sh
#set -x
pid=0
# SIGTERM-handler
term_handler() {
if [ $pid -ne 0 ]; then
kill -SIGTERM "$pid"
wait "$pid"
fi
exit 143; # 128 + 15 -- SIGTERM
}
# setup handlers
# on callback, kill the last background process, which is `tail -f /dev/null` and execute the specified handler
trap 'kill ${!}; term_handler' SIGTERM
echo "Started DW php code"
# wait forever
while true
do
tail -f /dev/null & wait ${!}
done
或者，更多的努力，但可能是停滞的方式，用于容器。一个是带有主机安装的docker socket的测试运行器。这个将运行测试并启动mongod contaienr并在你喜欢的时候杀死，所以基本上测试将杀死/ rm mongod容器而不是进程本身 - 然后再次启动容器。