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我接管了一个旧的 PHP 项目，该项目有一个现有的基础设施（服务器）启动并运行。现在我想搬到另一个提供商，但是逆向工程是如何设置的有点神秘。关于该部署的一个“神秘”的事情是各种图像及其相关性，以及它们似乎共享数据而没有在 Docker 文件中指定任何此类内容的事实。

我现在意识到，在启动容器时可以挂载另一个容器中存在的卷，--volumes-from这可能就是这样做的，但我希望我能看到执行此操作的命令或选项。这可能（几年后）吗？

Dockerfiles

Dockerfile.code.yml

这包含所有 PHP 代码。除了将内容记录到标准输出之外，它本身似乎并没有做太多事情。

FROM debian:jessie

COPY . /var/www/myapp/
COPY deploy/parameters.yml.prod /var/www/myapp/app/config/parameters.yml
VOLUME /var/www/myapp/
COPY deploy/myapp-code-start.sh /myapp-code-start.sh
ENTRYPOINT /myapp-code-start.sh

Dockerfile.php-fpm.yml

这是实际的应用程序，但从文件中可以看出，它没有代码，这让我想知道它是如何工作的。

FROM php:7.2-fpm

RUN apt update && apt install -y libpq-dev libcurl4-gnutls-dev  libicu-dev
RUN docker-php-ext-install pdo_pgsql pgsql intl pcntl
RUN pecl install redis && docker-php-ext-enable redis
RUN usermod -u 1000 www-data

COPY deploy/php-config/uploads.ini /usr/local/etc/php/conf.d/
COPY deploy/myapp-app-start.sh /myapp-app-start.sh
ENTRYPOINT /myapp-app-start.sh

码头工人输出

运行容器

root@myapp-app2:~# docker ps
CONTAINER ID        IMAGE                                    COMMAND                  CREATED             STATUS              PORTS                                           NAMES
4551cbfdb140        128.18.125.254:5000/myapp-fpm:latest      "/bin/sh -c /myapp-ap…"   19 months ago       Up 8 months         10.135.17.193:9000->9000/tcp                    root_myapp-fpm_1
8018f756f345        128.18.125.254:5000/myapp-static:latest   "nginx -g 'daemon of…"   19 months ago       Up 8 months         80/tcp, 443/tcp, 10.135.17.193:8080->8080/tcp   root_myapp-static_1
e2d5c3b22e65        128.68.125.254:5000/myapp-cron:latest     "start-cron"             19 months ago       Up 8 months                                                         root_myapp-cron_1
7713d5314f58        128.18.125.254:5000/myapp-code:latest     "/bin/sh -c /myapp-co…"   19 months ago       Up 8 months                                                         root_myapp-code_1
2080da8189fb        redis:3-alpine                           "docker-entrypoint.s…"   19 months ago       Up 8 months         10.135.17.193:6379->6379/tcp                    root_myapp-redis_1

证明代码和 FPM 容器共享一个卷

使用this显示卷。

root@myapp-app2:~# docker container inspect  -f '{{range .Mounts}}{{.Type}}:{{.Source}}:{{.Destination}}{{println}}{{ end }}'  root_myapp-fpm_1
volume:/var/lib/docker/volumes/6dfeffc141172fc3241c3a8b0d11be2348f41fe22afd74a9fb286e349cf77cbe/_data:/var/www/myapp

root@myapp-app2:~# docker container inspect  -f '{{range .Mounts}}{{.Type}}:{{.Source}}:{{.Destination}}{{println}}{{ end }}'  root_myapp-code_1
volume:/var/lib/docker/volumes/6dfeffc141172fc3241c3a8b0d11be2348f41fe22afd74a9fb286e349cf77cbe/_data:/var/www/myapp

编辑：添加输出

输出自docker container inspect

root@myapp-app2:~# docker container inspect root_myapp-fpm_1
[
    {
        "Id": "4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5",
        "Created": "2020-03-03T11:00:30.24298832Z",
        "Path": "/bin/sh",
        "Args": [
            "-c",
            "/myapp-app-start.sh"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 24657,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2021-01-19T23:01:06.178494041Z",
            "FinishedAt": "2021-01-19T23:00:56.601585045Z"
        },
        "Image": "sha256:17b8f3c6bb49a1ad358aaffa9e53427bcbc9c72ca38a5ef9ebed92ca9e9e4c30",
        "ResolvConfPath": "/var/lib/docker/containers/4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5/hostname",
        "HostsPath": "/var/lib/docker/containers/4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5/hosts",
        "LogPath": "/var/lib/docker/containers/4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5/4551cbfdb140315826d84536ff2339896f48aff4f168253dfe9624f4839571f5-json.log",
        "Name": "/root_myapp-fpm_1",
        "RestartCount": 0,
        "Driver": "overlay",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "docker-default",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": [],
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "root_default",
            "PortBindings": {
                "9000/tcp": [
                    {
                        "HostIp": "10.135.17.193",
                        "HostPort": "9000"
                    }
                ]
            },
            "RestartPolicy": {
                "Name": "always",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": [
                "7713d5314f5812be835f23a69a5038c491b1eed8acbc7c05163db776caf9e294:rw"
            ],
            "CapAdd": null,
            "CapDrop": null,
            "Capabilities": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "shareable",
            "Cgroup": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 67108864,
            "Runtime": "runc",
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "Memory": 0,
            "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": null,
            "DeviceCgroupRules": null,
            "DeviceRequests": null,
            "KernelMemory": 0,
            "KernelMemoryTCP": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": null,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0,
            "MaskedPaths": [
                "/proc/asound",
                "/proc/acpi",
                "/proc/kcore",
                "/proc/keys",
                "/proc/latency_stats",
                "/proc/timer_list",
                "/proc/timer_stats",
                "/proc/sched_debug",
                "/proc/scsi",
                "/sys/firmware"
            ],
            "ReadonlyPaths": [
                "/proc/bus",
                "/proc/fs",
                "/proc/irq",
                "/proc/sys",
                "/proc/sysrq-trigger"
            ]
        },
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay/6297868c76dc68fed8629f8b17f269e0ac4bed82d6a2e9aec9540f977e9475de/root",
                "MergedDir": "/var/lib/docker/overlay/0e206d71b9812feea939b313258e6647e1b1039c6b10e2d081a005ff5188f306/merged",
                "UpperDir": "/var/lib/docker/overlay/0e206d71b9812feea939b313258e6647e1b1039c6b10e2d081a005ff5188f306/upper",
                "WorkDir": "/var/lib/docker/overlay/0e206d71b9812feea939b313258e6647e1b1039c6b10e2d081a005ff5188f306/work"
            },
            "Name": "overlay"
        },
        "Mounts": [
            {
                "Type": "volume",
                "Name": "6dfeffc141172fc3241c3a8b0d11be2348f41fe22afd74a9fb286e349cf77cbe",
                "Source": "/var/lib/docker/volumes/6dfeffc141172fc3241c3a8b0d11be2348f41fe22afd74a9fb286e349cf77cbe/_data",
                "Destination": "/var/www/myapp",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],
        "Config": {
            "Hostname": "4551cbfdb140",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "9000/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "PHPIZE_DEPS=autoconf \t\tdpkg-dev \t\tfile \t\tg++ \t\tgcc \t\tlibc-dev \t\tmake \t\tpkg-config \t\tre2c",
                "PHP_INI_DIR=/usr/local/etc/php",
                "PHP_EXTRA_CONFIGURE_ARGS=--enable-fpm --with-fpm-user=www-data --with-fpm-group=www-data --disable-cgi",
                "PHP_CFLAGS=-fstack-protector-strong -fpic -fpie -O2",
                "PHP_CPPFLAGS=-fstack-protector-strong -fpic -fpie -O2",
                "PHP_LDFLAGS=-Wl,-O1 -Wl,--hash-style=both -pie",
                "GPG_KEYS=A917B1ECDA84AEC2B568FED6F50ABC807BD5DCD0 528995BFEDFBA7191D46839EF9BA0ADA31CBD89E 1729F83938DA44E27BA0F4D3DBDB397470D12172",
                "PHP_VERSION=7.1.30",
                "PHP_URL=https://www.php.net/get/php-7.1.30.tar.xz/from/this/mirror",
                "PHP_ASC_URL=https://www.php.net/get/php-7.1.30.tar.xz.asc/from/this/mirror",
                "PHP_SHA256=6310599811536dbe87e4bcf212bf93196bdfaff519d0c821e4c0068efd096a7c",
                "PHP_MD5="
            ],
            "Cmd": null,
            "Image": "128.18.125.254:5000/myapp-fpm:latest",
            "Volumes": null,
            "WorkingDir": "/var/www/html",
            "Entrypoint": [
                "/bin/sh",
                "-c",
                "/myapp-app-start.sh"
            ],
            "OnBuild": null,
            "Labels": {
                "com.docker.compose.config-hash": "df8cddcbc8c7112eb8b18b2c1637146b8784597453297142fa56cd69e4ef8ff3",
                "com.docker.compose.container-number": "1",
                "com.docker.compose.oneoff": "False",
                "com.docker.compose.project": "root",
                "com.docker.compose.service": "myapp-fpm",
                "com.docker.compose.version": "1.8.0"
            },
            "StopSignal": "SIGQUIT"
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "25b66f536e29814970c16fc0f0518e6f5bb741db37ae4417d70ebff54110c512",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {
                "9000/tcp": [
                    {
                        "HostIp": "10.135.17.193",
                        "HostPort": "9000"
                    }
                ]
            },
            "SandboxKey": "/var/run/docker/netns/25b66f536e29",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "",
            "IPPrefixLen": 0,
            "IPv6Gateway": "",
            "MacAddress": "",
            "Networks": {
                "root_default": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": [
                        "myapp-fpm",
                        "4551cbfdb140"
                    ],
                    "NetworkID": "a6dd02493f7b5ba12701c5a73315b56ff3259edaad4ac27b7cbfd1182233d844",
                    "EndpointID": "00cdf1969d3835fd4f3e9b9face8b00c8255707656d285b754a4e19e90ae694e",
                    "Gateway": "172.18.0.1",
                    "IPAddress": "172.18.0.5",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:12:00:05",
                    "DriverOpts": null
                }
            }
        }
    }
]
4

1 回答 1

0

我确实在inspect输出中看到了一个有趣的花絮：

$ docker container inspect root_myapp-fpm_1  | jq .[0].HostConfig.VolumesFrom
[
  "7713d5314f5812be835f23a69a5038c491b1eed8acbc7c05163db776caf9e294:rw"
]

这似乎暗示它是从 开始的--volumes-from 7713d5314f58，它使用myapp-code图像的 id。我想这是我需要重新创建设置类型的，但是该卷 ID 会随着每次新部署而改变，所以我需要找出以volumes_from.

Grepping 源代码以volumes_from实际检索到 docker-compose 文件：

version: "2"

services:
  myapp-code:
    image: 128.18.125.254:5000/myapp-code:latest
    restart: always
    depends_on:
      - myapp-redis

  myapp-fpm:
    image: 128.18.125.254:5000/myapp-fpm:latest
    restart: always
    ports:
      - "10.135.5.10:9000:9000"
    volumes_from:
      - myapp-code
    depends_on:
      - myapp-code

  myapp-cron:
    image: 128.18.125.254:5000/myapp-cron:latest
    restart: always
    volumes_from:
      - myapp-code
    depends_on:
      - myapp-code

  myapp-static:
    image: 128.18.125.254:5000/myapp-static:latest
    restart: always
    ports:
      - "10.125.5.10:8080:8080"
    volumes_from:
      - myapp-code
    depends_on:
      - myapp-code

  myapp-redis:
    image: redis:3-alpine
    restart: always
    ports:
      - "10.125.1.12:6379:6379"
于 2021-09-29T08:21:20.613 回答