Latest Posts - 技術語り-Tech Blog[JP]

someone

9 9月, 2020

■この本の内容をやってみた

■

1-1 Dockerとコンテナ技術

環境をひとまとめにした技術体系

1-2 インストール省略

1-3 Dockerの体験

Hello World

y-ononoMacBook-Pro:117 y_ono$ docker container run hello-world

Hello from Docker!

This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:

1. The Docker client contacted the Docker daemon.

2. The Docker daemon pulled the "hello-world" image from the Docker Hub.

(amd64)

3. The Docker daemon created a new container from that image which runs the

executable that produces the output you are currently reading.

4. The Docker daemon streamed that output to the Docker client, which sent it

to your terminal.

To try something more ambitious, you can run an Ubuntu container with:

$ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:

https://hub.docker.com/

For more examples and ideas, visit:

https://docs.docker.com/get-started/

y-ononoMacBook-Pro:117 y_ono$

webサーバーの起動

http://localhost:8080/

バックグラウンドの並列実行

y-ononoMacBook-Pro:~ y_ono$ docker container run --name mynginx -d -p 8081:80 nginx

077806e698c1b539399c766b8d5a7d3dc7193ca48ba0c998869403f9cdaf65ee

y-ononoMacBook-Pro:~ y_ono$

起動中のコンテナ確認

y-ononoMacBook-Pro:~ y_ono$ docker container ls

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

077806e698c1 nginx "/docker-entrypoint.…" 33 seconds ago Up 31 seconds 0.0.0.0:8081->80/tcp mynginx

0fdc6121daf9 nginx "/docker-entrypoint.…" 25 minutes ago Up 25 minutes 0.0.0.0:8080->80/tcp hogehoge

y-ononoMacBook-Pro:~ y_ono$

コンテナの停止

y-ononoMacBook-Pro:~ y_ono$ docker container stop hogehoge

hogehoge

y-ononoMacBook-Pro:~ y_ono$ docker container stop mynginx

mynginx

y-ononoMacBook-Pro:~ y_ono$

DockerHubへのログイン・ログアウト

y-ononoMacBook-Pro:~ y_ono$ docker login

Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.

Username:

1-4.コンテナの利用法を学ぶ

コンテナの作成

y-ononoMacBook-Pro:~ y_ono$ docker container run nginx

/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration

/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/

/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh

10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf

10-listen-on-ipv6-by-default.sh: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf

/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh

/docker-entrypoint.sh: Configuration complete; ready for start up

<ctrl+c>

-itオプション　作成したコンテナの操作

y-ononoMacBook-Pro:~ y_ono$ docker container run -it nginx bash

root@53bd8a8744ca:/#

bash操作とキーボード操作のこと

root@53bd8a8744ca:/# exit

exit

-dオプション　バックグラウンド起動

--rmオプション　停止したら破棄するオプション

y-ononoMacBook-Pro:~ y_ono$ docker container run -name hello1 -d hello-world

unknown shorthand flag: 'n' in -name

See 'docker container run --help'.

y-ononoMacBook-Pro:~ y_ono$ docker container run --name hello1 -d hello-world

593e6006f126d16769f4680069fa486ed2e09d5ec5c326c5afb256e5e6c918db

y-ononoMacBook-Pro:~ y_ono$

稼働済みのコンテナでコマンドを発行

y-ononoMacBook-Pro:~ y_ono$ docker container exec mynginx date

Sat Nov 7 11:50:39 UTC 2020

y-ononoMacBook-Pro:~ y_ono$

y-ononoMacBook-Pro:~ y_ono$ docker container exec -it mynginx bash

root@b6117d59c282:/#

コマンドをhostではなくcontainerで使いたい場合のリダイレクト処理について

y-ononoMacBook-Pro:117 y_ono$ docker container exec -it mynginx sh -c "echo 'hello docker' > /hello.txt"

y-ononoMacBook-Pro:117 y_ono$ docker container exec mynginx cat /hello.txt

hello docker

y-ononoMacBook-Pro:117 y_ono$

複雑な処理の場合は、コンテナにシェルスクリプトを書いておき、それを呼び出す方がシンプルです。

helpコマンドの使い方

y-ononoMacBook-Pro:117 y_ono$ docker help

Usage: docker [OPTIONS] COMMAND

A self-sufficient runtime for containers

Options:

--config string Location of client config files (default "/Users/y_ono/.docker")

-c, --context string Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set

with "docker context use")

-D, --debug Enable debug mode

-H, --host list Daemon socket(s) to connect to

-l, --log-level string Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")

--tls Use TLS; implied by --tlsverify

--tlscacert string Trust certs signed only by this CA (default "/Users/y_ono/.docker/ca.pem")

--tlscert string Path to TLS certificate file (default "/Users/y_ono/.docker/cert.pem")

--tlskey string Path to TLS key file (default "/Users/y_ono/.docker/key.pem")

--tlsverify Use TLS and verify the remote

-v, --version Print version information and quit

Management Commands:

builder Manage builds

config Manage Docker configs

container Manage containers

context Manage contexts

image Manage images

network Manage networks

node Manage Swarm nodes

plugin Manage plugins

scan* Docker Scan (Docker Inc., v0.3.4)

secret Manage Docker secrets

service Manage services

stack Manage Docker stacks

swarm Manage Swarm

system Manage Docker

trust Manage trust on Docker images

volume Manage volumes

Commands:

attach Attach local standard input, output, and error streams to a running container

build Build an image from a Dockerfile

commit Create a new image from a container's changes

cp Copy files/folders between a container and the local filesystem

create Create a new container

diff Inspect changes to files or directories on a container's filesystem

events Get real time events from the server

exec Run a command in a running container

export Export a container's filesystem as a tar archive

history Show the history of an image

images List images

import Import the contents from a tarball to create a filesystem image

info Display system-wide information

inspect Return low-level information on Docker objects

kill Kill one or more running containers

load Load an image from a tar archive or STDIN

logout Log out from a Docker registry

logs Fetch the logs of a container

pause Pause all processes within one or more containers

port List port mappings or a specific mapping for the container

ps List containers

pull Pull an image or a repository from a registry

push Push an image or a repository to a registry

rename Rename a container

restart Restart one or more containers

rm Remove one or more containers

rmi Remove one or more images

run Run a command in a new container

save Save one or more images to a tar archive (streamed to STDOUT by default)

search Search the Docker Hub for images

start Start one or more stopped containers

stats Display a live stream of container(s) resource usage statistics

stop Stop one or more running containers

tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE

top Display the running processes of a container

unpause Unpause all processes within one or more containers

update Update configuration of one or more containers

version Show the Docker version information

wait Block until one or more containers stop, then print their exit codes

Run 'docker COMMAND --help' for more information on a command.

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker container help

Usage: docker container COMMAND

Manage containers

Commands:

attach Attach local standard input, output, and error streams to a running container

commit Create a new image from a container's changes

cp Copy files/folders between a container and the local filesystem

create Create a new container

diff Inspect changes to files or directories on a container's filesystem

exec Run a command in a running container

export Export a container's filesystem as a tar archive

inspect Display detailed information on one or more containers

kill Kill one or more running containers

logs Fetch the logs of a container

ls List containers

pause Pause all processes within one or more containers

port List port mappings or a specific mapping for the container

prune Remove all stopped containers

rename Rename a container

restart Restart one or more containers

rm Remove one or more containers

run Run a command in a new container

start Start one or more stopped containers

stats Display a live stream of container(s) resource usage statistics

stop Stop one or more running containers

top Display the running processes of a container

unpause Unpause all processes within one or more containers

update Update configuration of one or more containers

wait Block until one or more containers stop, then print their exit codes

Run 'docker container COMMAND --help' for more information on a command.

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker container run --help

Usage: docker container run [OPTIONS] IMAGE [COMMAND] [ARG...]

Run a command in a new container

Options:

--add-host list Add a custom host-to-IP mapping (host:ip)

-a, --attach list Attach to STDIN, STDOUT or STDERR

--blkio-weight uint16 Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)

--blkio-weight-device list Block IO weight (relative device weight) (default [])

--cap-add list Add Linux capabilities

--cap-drop list Drop Linux capabilities

--cgroup-parent string Optional parent cgroup for the container

--cidfile string Write the container ID to the file

--cpu-period int Limit CPU CFS (Completely Fair Scheduler) period

--cpu-quota int Limit CPU CFS (Completely Fair Scheduler) quota

--cpu-rt-period int Limit CPU real-time period in microseconds

--cpu-rt-runtime int Limit CPU real-time runtime in microseconds

-c, --cpu-shares int CPU shares (relative weight)

--cpus decimal Number of CPUs

--cpuset-cpus string CPUs in which to allow execution (0-3, 0,1)

--cpuset-mems string MEMs in which to allow execution (0-3, 0,1)

-d, --detach Run container in background and print container ID

--detach-keys string Override the key sequence for detaching a container

--device list Add a host device to the container

--device-cgroup-rule list Add a rule to the cgroup allowed devices list

--device-read-bps list Limit read rate (bytes per second) from a device (default [])

--device-read-iops list Limit read rate (IO per second) from a device (default [])

--device-write-bps list Limit write rate (bytes per second) to a device (default [])

--device-write-iops list Limit write rate (IO per second) to a device (default [])

--disable-content-trust Skip image verification (default true)

--dns list Set custom DNS servers

--dns-option list Set DNS options

--dns-search list Set custom DNS search domains

--domainname string Container NIS domain name

--entrypoint string Overwrite the default ENTRYPOINT of the image

-e, --env list Set environment variables

--env-file list Read in a file of environment variables

--expose list Expose a port or a range of ports

--gpus gpu-request GPU devices to add to the container ('all' to pass all GPUs)

--group-add list Add additional groups to join

--health-cmd string Command to run to check health

--health-interval duration Time between running the check (ms|s|m|h) (default 0s)

--health-retries int Consecutive failures needed to report unhealthy

--health-start-period duration Start period for the container to initialize before starting health-retries countdown

(ms|s|m|h) (default 0s)

--health-timeout duration Maximum time to allow one check to run (ms|s|m|h) (default 0s)

--help Print usage

-h, --hostname string Container host name

--init Run an init inside the container that forwards signals and reaps processes

-i, --interactive Keep STDIN open even if not attached

--ip string IPv4 address (e.g., 172.30.100.104)

--ip6 string IPv6 address (e.g., 2001:db8::33)

--ipc string IPC mode to use

--isolation string Container isolation technology

--kernel-memory bytes Kernel memory limit

-l, --label list Set meta data on a container

--label-file list Read in a line delimited file of labels

--link list Add link to another container

--link-local-ip list Container IPv4/IPv6 link-local addresses

--log-driver string Logging driver for the container

--log-opt list Log driver options

--mac-address string Container MAC address (e.g., 92:d0:c6:0a:29:33)

-m, --memory bytes Memory limit

--memory-reservation bytes Memory soft limit

--memory-swap bytes Swap limit equal to memory plus swap: '-1' to enable unlimited swap

--memory-swappiness int Tune container memory swappiness (0 to 100) (default -1)

--mount mount Attach a filesystem mount to the container

--name string Assign a name to the container

--network network Connect a container to a network

--network-alias list Add network-scoped alias for the container

--no-healthcheck Disable any container-specified HEALTHCHECK

--oom-kill-disable Disable OOM Killer

--oom-score-adj int Tune host's OOM preferences (-1000 to 1000)

--pid string PID namespace to use

--pids-limit int Tune container pids limit (set -1 for unlimited)

--platform string Set platform if server is multi-platform capable

--privileged Give extended privileges to this container

-p, --publish list Publish a container's port(s) to the host

-P, --publish-all Publish all exposed ports to random ports

--read-only Mount the container's root filesystem as read only

--restart string Restart policy to apply when a container exits (default "no")

--rm Automatically remove the container when it exits

--runtime string Runtime to use for this container

--security-opt list Security Options

--shm-size bytes Size of /dev/shm

--sig-proxy Proxy received signals to the process (default true)

--stop-signal string Signal to stop a container (default "SIGTERM")

--stop-timeout int Timeout (in seconds) to stop a container

--storage-opt list Storage driver options for the container

--sysctl map Sysctl options (default map[])

--tmpfs list Mount a tmpfs directory

-t, --tty Allocate a pseudo-TTY

--ulimit ulimit Ulimit options (default [])

-u, --user string Username or UID (format: <name|uid>[:<group|gid>])

--userns string User namespace to use

--uts string UTS namespace to use

-v, --volume list Bind mount a volume

--volume-driver string Optional volume driver for the container

--volumes-from list Mount volumes from the specified container(s)

-w, --workdir string Working directory inside the container

y-ononoMacBook-Pro:117 y_ono$

コンテナ情報の確認

y-ononoMacBook-Pro:117 y_ono$ docker container ls

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

b6117d59c282 nginx "/docker-entrypoint.…" 15 minutes ago Up 15 minutes 0.0.0.0:8081->80/tcp mynginx

y-ononoMacBook-Pro:117 y_ono$

ls -a で停止しているコンテナも見えるようにする

y-ononoMacBook-Pro:117 y_ono$ docker container ls -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

b6117d59c282 nginx "/docker-entrypoint.…" 15 minutes ago Up 15 minutes 0.0.0.0:8081->80/tcp mynginx

593e6006f126 hello-world "/hello" 5 hours ago Exited (0) 5 hours ago hello1

d7752e14fdb1 nginx:1.14.0 "nginx -g 'daemon of…" 2 days ago Exited (0) 7 hours ago uims-portal-web

a48be28a7f4f uims-api_api "bin/rails s" 2 days ago Exited (1) 7 hours ago uims-portal-api

08ff98534f9f uims-portal_app "npm run dev" 2 days ago Exited (0) 7 hours ago uims-portal-app

32ac52a3cddd mariadb:10.3.8 "docker-entrypoint.s…" 2 days ago Exited (0) 7 hours ago uims-portal-db

3a61a3dd2ef8 uims-api_api "bin/rails s -p 3001…" 2 months ago Exited (1) 2 days ago uims-api

fff025712b77 mariadb:10.3.8 "docker-entrypoint.s…" 2 months ago Exited (0) 7 hours ago uims-api-db

y-ononoMacBook-Pro:117 y_ono$

特定コンテナの情報をみる

y-ononoMacBook-Pro:117 y_ono$ docker container inspect mynginx

[

{

"Id": "b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914",

"Created": "2020-11-07T11:50:05.227771Z",

"Path": "/docker-entrypoint.sh",

"Args": [

"nginx",

"-g",

"daemon off;"

"State": {

"Status": "running",

"Running": true,

"Paused": false,

"Restarting": false,

"OOMKilled": false,

"Dead": false,

"Pid": 3270,

"ExitCode": 0,

"Error": "",

"StartedAt": "2020-11-07T11:50:05.6721718Z",

"FinishedAt": "0001-01-01T00:00:00Z"

"Image": "sha256:c39a868aad02a383c7e490e0fc4a5b0217f667f2de764bc2755e315a5adf64a1",

"ResolvConfPath": "/var/lib/docker/containers/b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914/resolv.conf",

"HostnamePath": "/var/lib/docker/containers/b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914/hostname",

"HostsPath": "/var/lib/docker/containers/b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914/hosts",

"LogPath": "/var/lib/docker/containers/b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914/b6117d59c282b59473ac3969fe070eee523d78f6baf7394c5315902a12487914-json.log",

"Name": "/mynginx",

"RestartCount": 0,

"Driver": "overlay2",

"Platform": "linux",

"MountLabel": "",

"ProcessLabel": "",

"AppArmorProfile": "",

"ExecIDs": null,

"HostConfig": {

"Binds": null,

"ContainerIDFile": "",

"LogConfig": {

"Type": "json-file",

"Config": {}

"NetworkMode": "default",

"PortBindings": {

"80/tcp": [

{

"HostIp": "",

"HostPort": "8081"

}

]

"RestartPolicy": {

"Name": "no",

"MaximumRetryCount": 0

"AutoRemove": false,

"VolumeDriver": "",

"VolumesFrom": null,

"CapAdd": null,

"CapDrop": null,

"Capabilities": null,

"Dns": [],

"DnsOptions": [],

"DnsSearch": [],

"ExtraHosts": null,

"GroupAdd": null,

"IpcMode": "private",

"Cgroup": "",

"Links": null,

"OomScoreAdj": 0,

"PidMode": "",

"Privileged": false,

"PublishAllPorts": false,

"ReadonlyRootfs": false,

"SecurityOpt": null,

"UTSMode": "",

"UsernsMode": "",

"ShmSize": 67108864,

"Runtime": "runc",

"ConsoleSize": [

"Isolation": "",

"CpuShares": 0,

"Memory": 0,

"NanoCpus": 0,

"CgroupParent": "",

"BlkioWeight": 0,

"BlkioWeightDevice": [],

"BlkioDeviceReadBps": null,

"BlkioDeviceWriteBps": null,

"BlkioDeviceReadIOps": null,

"BlkioDeviceWriteIOps": null,

"CpuPeriod": 0,

"CpuQuota": 0,

"CpuRealtimePeriod": 0,

"CpuRealtimeRuntime": 0,

"CpusetCpus": "",

"CpusetMems": "",

"Devices": [],

"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/overlay2/de6acf882865e54dd26d56cc0288996971d22e239d9d7e169a84dde7469fb9bd-init/diff:/var/lib/docker/overlay2/2b2cca916e7a6df810885455c7ba499d3162b1d1b93057ef49a3c43c70fa02bf/diff:/var/lib/docker/overlay2/8f9a2debcd1c6395d5f8fa8cb4975715dcb31ba85ad237998bab7cb622c83b99/diff:/var/lib/docker/overlay2/086ce3e001c730db024d8f3b8e23e53dbc6fac25fe1cd1a62683129ce7997b8a/diff:/var/lib/docker/overlay2/45a7e82547e311229f5161c413a86a23422f4e80b2e5a5c707841ee388383b66/diff:/var/lib/docker/overlay2/a92c2a8ad0f33d9b4d344d8479a23e9f848cedbc16e33d25bea0bb1276981065/diff",

"MergedDir": "/var/lib/docker/overlay2/de6acf882865e54dd26d56cc0288996971d22e239d9d7e169a84dde7469fb9bd/merged",

"UpperDir": "/var/lib/docker/overlay2/de6acf882865e54dd26d56cc0288996971d22e239d9d7e169a84dde7469fb9bd/diff",

"WorkDir": "/var/lib/docker/overlay2/de6acf882865e54dd26d56cc0288996971d22e239d9d7e169a84dde7469fb9bd/work"

"Name": "overlay2"

"Mounts": [],

"Config": {

"Hostname": "b6117d59c282",

"Domainname": "",

"User": "",

"AttachStdin": false,

"AttachStdout": false,

"AttachStderr": false,

"ExposedPorts": {

"80/tcp": {}

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": [

"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",

"NGINX_VERSION=1.19.4",

"NJS_VERSION=0.4.4",

"PKG_RELEASE=1~buster"

"Cmd": [

"nginx",

"-g",

"daemon off;"

"Image": "nginx",

"Volumes": null,

"WorkingDir": "",

"Entrypoint": [

"/docker-entrypoint.sh"

"OnBuild": null,

"Labels": {

"maintainer": "NGINX Docker Maintainers \u003cdocker-maint@nginx.com\u003e"

"StopSignal": "SIGTERM"

"NetworkSettings": {

"Bridge": "",

"SandboxID": "41340469c543e22283aa86fdbf0c4f8a71a371c8e424c969e778524f9f4a4f8e",

"HairpinMode": false,

"LinkLocalIPv6Address": "",

"LinkLocalIPv6PrefixLen": 0,

"Ports": {

"80/tcp": [

{

"HostIp": "0.0.0.0",

"HostPort": "8081"

}

]

"SandboxKey": "/var/run/docker/netns/41340469c543",

"SecondaryIPAddresses": null,

"SecondaryIPv6Addresses": null,

"EndpointID": "c4d340df9820b6144d37ad42ad62edbcb12fc0e06ef09df3627dd7210ac32480",

"Gateway": "172.17.0.1",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"IPAddress": "172.17.0.2",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"MacAddress": "02:42:ac:11:00:02",

"Networks": {

"bridge": {

"IPAMConfig": null,

"Links": null,

"Aliases": null,

"NetworkID": "1964f6520d12b84560ce9e0e773389bf4ed979637311a5918b2d3dade8901e34",

"EndpointID": "c4d340df9820b6144d37ad42ad62edbcb12fc0e06ef09df3627dd7210ac32480",

"Gateway": "172.17.0.1",

"IPAddress": "172.17.0.2",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"MacAddress": "02:42:ac:11:00:02",

"DriverOpts": null

}

]

y-ononoMacBook-Pro:117 y_ono$

コンテナのログの確認

y-ononoMacBook-Pro:117 y_ono$ docker container run -d -p 8090:80 nginx

4bcc414f095fe0cfa7da0f6ab2b1092e4aacb04e21e43ad36ff1a78b7f3b1e07

y-ononoMacBook-Pro:117 y_ono$ docker container logs 4bcc414f095fe0cfa7da0f6ab2b1092e4aacb04e21e43ad36ff1a78b7f3b1e07

/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration

/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/

/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh

10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf

10-listen-on-ipv6-by-default.sh: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf

/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh

/docker-entrypoint.sh: Configuration complete; ready for start up

y-ononoMacBook-Pro:117 y_ono$

継続してログの表示 -f

y-ononoMacBook-Pro:117 y_ono$ docker container logs -f 4bcc414f095fe0cfa7da0f6ab2b1092e4aacb04e21e43ad36ff1a78b7f3b1e07

/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration

/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/

/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh

10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf

10-listen-on-ipv6-by-default.sh: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf

/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh

/docker-entrypoint.sh: Configuration complete; ready for start up

統計情報--no-stream

y-ononoMacBook-Pro:117 y_ono$ docker container stats --no-stream

CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS

4bcc414f095f zen_jepsen 0.00% 2.043MiB / 1.941GiB 0.10% 1.08kB / 0B 0B / 8.19kB 2

b6117d59c282 mynginx 0.00% 2.141MiB / 1.941GiB 0.11% 1.37kB / 0B 156kB / 8.19kB 2

y-ononoMacBook-Pro:117 y_ono$

出力フォーマット

y-ononoMacBook-Pro:117 y_ono$ docker container ls --format='table {{.ID}}\t{{.Names}}\t{{.Ports}}'

CONTAINER ID NAMES PORTS

4bcc414f095f zen_jepsen 0.0.0.0:8090->80/tcp

b6117d59c282 mynginx 0.0.0.0:8081->80/tcp

y-ononoMacBook-Pro:117 y_ono$

コンテナの停止と起動

y-ononoMacBook-Pro:117 y_ono$ docker container ls

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

4bcc414f095f nginx "/docker-entrypoint.…" 2 hours ago Up 2 hours 0.0.0.0:8090->80/tcp zen_jepsen

b6117d59c282 nginx "/docker-entrypoint.…" 2 hours ago Up 2 hours 0.0.0.0:8081->80/tcp mynginx

y-ononoMacBook-Pro:117 y_ono$ docker container stop zen_jepsen

zen_jepsen

y-ononoMacBook-Pro:117 y_ono$ docker container ls -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

4bcc414f095f nginx "/docker-entrypoint.…" 2 hours ago Exited (0) About a minute ago zen_jepsen

b6117d59c282 nginx "/docker-entrypoint.…" 2 hours ago Up 2 hours 0.0.0.0:8081->80/tcp mynginx

再開

y-ononoMacBook-Pro:117 y_ono$ docker container start zen_jepsen

zen_jepsen

y-ononoMacBook-Pro:117 y_ono$ docker container ls

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

4bcc414f095f nginx "/docker-entrypoint.…" 2 hours ago Up 5 seconds 0.0.0.0:8090->80/tcp zen_jepsen

b6117d59c282 nginx "/docker-entrypoint.…" 2 hours ago Up 2 hours 0.0.0.0:8081->80/tcp mynginx

y-ononoMacBook-Pro:117 y_ono$

停止しても状態を保持する必要があるのであれば、ボリューム機能などを使ってデータ永続化を行いつつ、コンテナが不要になれば破棄して新規作成を行うことが望ましい。

コンテナの破棄

y-ononoMacBook-Pro:117 y_ono$ docker container rm zen_jepsen

zen_jepsen

y-ononoMacBook-Pro:117 y_ono$

永続化データも消えるので絶対しない

1-5.Dockerの使い所を知る

・Dockerイメージはどこでも動く

・インフラをコード化できる

・アプリを小分けで開発できる

2Dockerイメージの利用

2-1Dockerイメージを使いこなす

publicイメージ
localイメージ
コンテナ

イメージ検索

y-ononoMacBook-Pro:117 y_ono$ docker search python

NAME DESCRIPTION STARS OFFICIAL AUTOMATED

python Python is an interpreted, interactive, objec… 5614 [OK]

django Django is a free web application framework, … 1007 [OK]

pypy PyPy is a fast, compliant alternative implem… 253 [OK]

joyzoursky/python-chromedriver Python with Chromedriver, for running automa… 54 [OK]

nikolaik/python-nodejs Python with Node.js 54 [OK]

arm32v7/python Python is an interpreted, interactive, objec… 53

circleci/python Python is an interpreted, interactive, objec… 41

centos/python-35-centos7 Platform for building and running Python 3.5… 38

centos/python-36-centos7 Platform for building and running Python 3.6… 30

hylang Hy is a Lisp dialect that translates express… 28 [OK]

arm64v8/python Python is an interpreted, interactive, objec… 23

centos/python-27-centos7 Platform for building and running Python 2.7… 17

bitnami/python Bitnami Python Docker Image 10 [OK]

publicisworldwide/python-conda Basic Python environments with Conda. 6 [OK]

dockershelf/python Repository for docker images of Python. Test… 5 [OK]

clearlinux/python Python programming interpreted language with… 4

d3fk/python_in_bottle Simple python:alpine completed by Bottle+Req… 4 [OK]

i386/python Python is an interpreted, interactive, objec… 3

komand/python-plugin DEPRECATED: Komand Python SDK 2 [OK]

centos/python-34-centos7 Platform for building and running Python 3.4… 2

ppc64le/python Python is an interpreted, interactive, objec… 2

amd64/python Python is an interpreted, interactive, objec… 1

ccitest/python CircleCI test images for Python 0 [OK]

s390x/python Python is an interpreted, interactive, objec… 0

saagie/python Repo for python jobs 0

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker search -f "is-official=true" -f "stars=50" python

NAME DESCRIPTION STARS OFFICIAL AUTOMATED

python Python is an interpreted, interactive, objec… 5614 [OK]

django Django is a free web application framework, … 1007 [OK]

pypy PyPy is a fast, compliant alternative implem… 253 [OK]

y-ononoMacBook-Pro:117 y_ono$

イメージを区別するタグ

イメージをpullして確認

y-ononoMacBook-Pro:117 y_ono$ docker pull python:3.7.5-slim

3.7.5-slim: Pulling from library/python

000eee12ec04: Pull complete

ddc2d83f8229: Pull complete

735b0bee82a3: Pull complete

8c69dcedfc84: Pull complete

495e1cccc7f9: Pull complete

Digest: sha256:59af1bb7fb92ff97c9a23abae23f6beda13a95dbfd8100c7a2f71d150c0dc6e5

Status: Downloaded newer image for python:3.7.5-slim

docker.io/library/python:3.7.5-slim

3.7.5-slim: Pulling from library/python

Digest: sha256:59af1bb7fb92ff97c9a23abae23f6beda13a95dbfd8100c7a2f71d150c0dc6e5

Status: Image is up to date for python:3.7.5-slim

docker.io/library/python:3.7.5-slim

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker image ls

REPOSITORY TAG IMAGE ID CREATED SIZE

nginx latest c39a868aad02 45 hours ago 133MB

uims-portal_app latest 4368b223c77d 3 days ago 882MB

uims-api_api latest 803bc652df0e 2 months ago 1.18GB

node 14.4.0-stretch-slim 0e2e78467169 5 months ago 165MB

hello-world latest bf756fb1ae65 10 months ago 13.3kB

python 3.7.5-slim 9f4008bf3f11 11 months ago 178MB

oiax/rails6-deps latest 68b3321c4f66 13 months ago 334MB

ruby 2.6.3 8fe6e1f7b421 15 months ago 840MB

postgres 11.2-alpine cd1fb3df8252 18 months ago 70.8MB

ruby 2.5.3 72aaaee1eea4 20 months ago 873MB

ruby 2.5.1 3c8181e703d2 2 years ago 869MB

nginx 1.14.0 ecc98fc2f376 2 years ago 109MB

mariadb 10.3.8 2c73b3262fff 2 years ago 363MB

node 8.11.3 ed145ef978c4 2 years ago 673MB

ruby 2.4.0 6ec7e9c998da 3 years ago 681MB

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker image inspect python:3.7.5-slim

[

{

"Id": "sha256:9f4008bf3f119728447a7112ff04e016d8eb756158525ffec07c7f2e4e80cf90",

"RepoTags": [

"python:3.7.5-slim"

"RepoDigests": [

"python@sha256:59af1bb7fb92ff97c9a23abae23f6beda13a95dbfd8100c7a2f71d150c0dc6e5"

"Parent": "",

"Comment": "",

"Created": "2019-11-23T06:13:06.996726463Z",

"Container": "d4b8fa53d5780c03274b6f39087a1d5c56523eb428ed523d2e967b0fe3029367",

"ContainerConfig": {

"Hostname": "d4b8fa53d578",

"Domainname": "",

"User": "",

"AttachStdin": false,

"AttachStdout": false,

"AttachStderr": false,

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": [

"PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",

"LANG=C.UTF-8",

"GPG_KEY=0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D",

"PYTHON_VERSION=3.7.5",

"PYTHON_PIP_VERSION=19.3.1",

"PYTHON_GET_PIP_URL=https://github.com/pypa/get-pip/raw/ffe826207a010164265d9cc807978e3604d18ca0/get-pip.py",

"PYTHON_GET_PIP_SHA256=b86f36cc4345ae87bfd4f10ef6b2dbfa7a872fbff70608a1e43944d283fd0eee"

"Cmd": [

"/bin/sh",

"-c",

"#(nop) ",

"CMD [\"python3\"]"

"ArgsEscaped": true,

"Image": "sha256:62d1bf5a3803ce220f72a7bce573128e95cfe9b0b73f9c1d0fcce304a8cddf74",

"Volumes": null,

"WorkingDir": "",

"Entrypoint": null,

"OnBuild": null,

"Labels": {}

"DockerVersion": "18.06.1-ce",

"Author": "",

"Config": {

"Hostname": "",

"Domainname": "",

"User": "",

"AttachStdin": false,

"AttachStdout": false,

"AttachStderr": false,

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": [

"PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",

"LANG=C.UTF-8",

"GPG_KEY=0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D",

"PYTHON_VERSION=3.7.5",

"PYTHON_PIP_VERSION=19.3.1",

"PYTHON_GET_PIP_URL=https://github.com/pypa/get-pip/raw/ffe826207a010164265d9cc807978e3604d18ca0/get-pip.py",

"PYTHON_GET_PIP_SHA256=b86f36cc4345ae87bfd4f10ef6b2dbfa7a872fbff70608a1e43944d283fd0eee"

"Cmd": [

"python3"

"ArgsEscaped": true,

"Image": "sha256:62d1bf5a3803ce220f72a7bce573128e95cfe9b0b73f9c1d0fcce304a8cddf74",

"Volumes": null,

"WorkingDir": "",

"Entrypoint": null,

"OnBuild": null,

"Labels": null

"Architecture": "amd64",

"Os": "linux",

"Size": 178498345,

"VirtualSize": 178498345,

"GraphDriver": {

"Data": {

"LowerDir": "/var/lib/docker/overlay2/8d826e873f17aba4c2da7927482f6e61906e5a63146fe9d71d6d43de3aa1a060/diff:/var/lib/docker/overlay2/150c63e1d2e6a0ed87ffe2278ed7330fa6d6bfc649781eabc4b03260503e44ad/diff:/var/lib/docker/overlay2/e59955f15c62e3845cd38a43b44d3de85a57d3e1705978f7915db0032e9e21c9/diff:/var/lib/docker/overlay2/d2816e09abafbfbcf6094f68faabddb963bd5d2899fc0c1d874c153ebea12fca/diff",

"MergedDir": "/var/lib/docker/overlay2/68806423348b21caebb9b3a00864445adbf8080acae2c3aa121d26b83c567ed9/merged",

"UpperDir": "/var/lib/docker/overlay2/68806423348b21caebb9b3a00864445adbf8080acae2c3aa121d26b83c567ed9/diff",

"WorkDir": "/var/lib/docker/overlay2/68806423348b21caebb9b3a00864445adbf8080acae2c3aa121d26b83c567ed9/work"

"Name": "overlay2"

"RootFS": {

"Type": "layers",

"Layers": [

"sha256:831c5620387fb9efec59fc82a42b948546c6be601e3ab34a87108ecf852aa15f",

"sha256:459d9d53a2569cce05f289f8a7b84bf14e0d160aef722169e792743130fc6c53",

"sha256:ca56b6fe98b719be763ba1c978f2fe1a1c6b14a5d4b7c867f8e6b2fdbb5bd63e",

"sha256:870ea4318145741ea160b4661210d101273d51c807e5a23b0a087b464438cfc9",

"sha256:36c21e8952307685df69802fc94b1b75dbcb70a2e8465c97cb9c56a828e3615a"

]

"Metadata": {

"LastTagTime": "0001-01-01T00:00:00Z"

}

]

y-ononoMacBook-Pro:117 y_ono$

イメージを削除

y-ononoMacBook-Pro:117 y_ono$ docker rm hello1

hello1

y-ononoMacBook-Pro:117 y_ono$

コンテナ削除

docker prune -f

2-2イメージを作成してレジストリに登録する

イメージからコンテナの起動
コンテナ内でflaskのインストール
アプリサーバのコードを手元からコンテナにコピー
コンテナでアプリサーバの起動
コンテナのイメージか
イメージにユーザ名とタグを加えて改名
改名したイメージをレジストリに登録

コンテナ起動してパッケージのインストール

y-ononoMacBook-Pro:117 y_ono$ docker container run --name base -it -p 8080:80 python:3.7.5-slim bash

root@3d1d9602fd01:/# pip install flask==1.1.1

Collecting flask==1.1.1

Downloading https://files.pythonhosted.org/packages/9b/93/628509b8d5dc749656a9641f4caf13540e2cdec85276964ff8f43bbb1d3b/Flask-1.1.1-py2.py3-none-any.whl (94kB)

|████████████████████████████████| 102kB 423kB/s

Collecting itsdangerous>=0.24

Downloading https://files.pythonhosted.org/packages/76/ae/44b03b253d6fade317f32c24d100b3b35c2239807046a4c953c7b89fa49e/itsdangerous-1.1.0-py2.py3-none-any.whl

Collecting Werkzeug>=0.15

Downloading https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl (298kB)

|████████████████████████████████| 307kB 829kB/s

Collecting click>=5.1

Downloading https://files.pythonhosted.org/packages/d2/3d/fa76db83bf75c4f8d338c2fd15c8d33fdd7ad23a9b5e57eb6c5de26b430e/click-7.1.2-py2.py3-none-any.whl (82kB)

|████████████████████████████████| 92kB 978kB/s

Collecting Jinja2>=2.10.1

Downloading https://files.pythonhosted.org/packages/30/9e/f663a2aa66a09d838042ae1a2c5659828bb9b41ea3a6efa20a20fd92b121/Jinja2-2.11.2-py2.py3-none-any.whl (125kB)

|████████████████████████████████| 133kB 920kB/s

Collecting MarkupSafe>=0.23

Downloading https://files.pythonhosted.org/packages/98/7b/ff284bd8c80654e471b769062a9b43cc5d03e7a615048d96f4619df8d420/MarkupSafe-1.1.1-cp37-cp37m-manylinux1_x86_64.whl

Installing collected packages: itsdangerous, Werkzeug, click, MarkupSafe, Jinja2, flask

Successfully installed Jinja2-2.11.2 MarkupSafe-1.1.1 Werkzeug-1.0.1 click-7.1.2 flask-1.1.1 itsdangerous-1.1.0

WARNING: You are using pip version 19.3.1; however, version 20.2.4 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

root@3d1d9602fd01:/#

ホストからコンテナにファイルを送る

import flask
app = flask.Flask('app server')

@app.route('/')
def index():
  return 'Hello Docker'

app.run(debug=True, host='0.0.0.0', port=80)

これを転送

y-ononoMacBook-Pro:117 y_ono$ ls

server.py

y-ononoMacBook-Pro:117 y_ono$ docker container cp server.py base:/

y-ononoMacBook-Pro:117 y_ono$

実行

root@3d1d9602fd01:/# ls /

bin boot dev etc home lib lib64 media mnt opt proc root run sbin server.py srv sys tmp usr var

root@3d1d9602fd01:/# python -u /server.py

* Serving Flask app "app server" (lazy loading)

* Environment: production

WARNING: This is a development server. Do not use it in a production deployment.

Use a production WSGI server instead.

* Debug mode: on

* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)

* Restarting with stat

* Debugger is active!

* Debugger PIN: 273-489-757

y-ononoMacBook-Pro:117 y_ono$ docker container cp base:/etc/hosts ./

y-ononoMacBook-Pro:117 y_ono$ cat hosts

127.0.0.1 localhost

::1 localhost ip6-localhost ip6-loopback

fe00::0 ip6-localnet

ff00::0 ip6-mcastprefix

ff02::1 ip6-allnodes

ff02::2 ip6-allrouters

172.17.0.3 3d1d9602fd01

y-ononoMacBook-Pro:117 y_ono$

コンテナを停止してイメージ化する

root@3d1d9602fd01:/# python -u /server.py

* Serving Flask app "app server" (lazy loading)

* Environment: production

WARNING: This is a development server. Do not use it in a production deployment.

Use a production WSGI server instead.

* Debug mode: on

* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)

* Restarting with stat

* Debugger is active!

* Debugger PIN: 273-489-757

^Croot@3d1d9602fd01:/exit

exit

y-ononoMacBook-Pro:117 y_ono$

y-ononoMacBook-Pro:117 y_ono$ docker container commit base c2img1_app

sha256:84d1c63117c4add3f4212ebdfc939b42776bda4a69fafabbffb8026c51523de0

y-ononoMacBook-Pro:117 y_ono$ docker image ls

REPOSITORY TAG IMAGE ID CREATED SIZE

c2img1_app latest 84d1c63117c4 11 seconds ago 188MB

nginx latest c39a868aad02 3 days ago 133MB

uims-portal_app latest 4368b223c77d 4 days ago 882MB

uims-api_api latest 803bc652df0e 2 months ago 1.18GB

node 14.4.0-stretch-slim 0e2e78467169 5 months ago 165MB

hello-world latest bf756fb1ae65 10 months ago 13.3kB

python 3.7.5-slim 9f4008bf3f11 11 months ago 178MB

oiax/rails6-deps latest 68b3321c4f66 13 months ago 334MB

ruby 2.6.3 8fe6e1f7b421 15 months ago 840MB

postgres 11.2-alpine cd1fb3df8252 18 months ago 70.8MB

ruby 2.5.3 72aaaee1eea4 20 months ago 873MB

ruby 2.5.1 3c8181e703d2 2 years ago 869MB

nginx 1.14.0 ecc98fc2f376 2 years ago 109MB

mariadb 10.3.8 2c73b3262fff 2 years ago 363MB

node 8.11.3 ed145ef978c4 2 years ago 673MB

ruby 2.4.0 6ec7e9c998da 3 years ago 681MB

y-ononoMacBook-Pro:117 y_ono$ docker container run --rm -p 8080:80 c2img1_app python -u /server.py

* Serving Flask app "app server" (lazy loading)

* Environment: production

WARNING: This is a development server. Do not use it in a production deployment.

Use a production WSGI server instead.

* Debug mode: on

* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)

* Restarting with stat

* Debugger is active!

* Debugger PIN: 952-802-701

イメージの階層構造

y-ononoMacBook-Pro:117 y_ono$ docker image history c2img1_app

IMAGE CREATED CREATED BY SIZE COMMENT

84d1c63117c4 3 minutes ago bash 9.51MB

9f4008bf3f11 11 months ago /bin/sh -c #(nop) CMD ["python3"] 0B

<missing> 11 months ago /bin/sh -c set -ex; savedAptMark="$(apt-ma… 7.42MB

<missing> 11 months ago /bin/sh -c #(nop) ENV PYTHON_GET_PIP_SHA256… 0B

<missing> 11 months ago /bin/sh -c #(nop) ENV PYTHON_GET_PIP_URL=ht… 0B

<missing> 11 months ago /bin/sh -c #(nop) ENV PYTHON_PIP_VERSION=19… 0B

<missing> 11 months ago /bin/sh -c cd /usr/local/bin && ln -s idle3… 32B

<missing> 11 months ago /bin/sh -c set -ex && savedAptMark="$(apt-… 94.8MB

<missing> 11 months ago /bin/sh -c #(nop) ENV PYTHON_VERSION=3.7.5 0B

<missing> 11 months ago /bin/sh -c #(nop) ENV GPG_KEY=0D96DF4D4110E… 0B

<missing> 11 months ago /bin/sh -c apt-get update && apt-get install… 7.03MB

<missing> 11 months ago /bin/sh -c #(nop) ENV LANG=C.UTF-8 0B

<missing> 11 months ago /bin/sh -c #(nop) ENV PATH=/usr/local/bin:/… 0B

<missing> 11 months ago /bin/sh -c #(nop) CMD ["bash"] 0B

<missing> 11 months ago /bin/sh -c #(nop) ADD file:bc8179c87c8dbb3d9… 69.2MB

y-ononoMacBook-Pro:117 y_ono$

イメージにタグづけ

y-ononoMacBook-Pro:117 y_ono$ docker image tag c2img1_app y_ono/c2img1_app

y-ononoMacBook-Pro:117 y_ono$ docker image tag c2img1_app y_ono/c2img1_app:v1.0

y-ononoMacBook-Pro:117 y_ono$ docker image ls

REPOSITORY TAG IMAGE ID CREATED SIZE

c2img1_app latest 84d1c63117c4 6 minutes ago 188MB

y_ono/c2img1_app latest 84d1c63117c4 6 minutes ago 188MB

y_ono/c2img1_app v1.0 84d1c63117c4 6 minutes ago 188MB

レジストリへのプッシュ

The push refers to repository [docker.io/y_ono/c2img1_app]

a4a183bbd3a1: Preparing

36c21e895230: Preparing

870ea4318145: Preparing

ca56b6fe98b7: Preparing

459d9d53a256: Preparing

831c5620387f: Waiting

denied: requested access to the resource is denied

y-ononoMacBook-Pro:117 y_ono$

DockerHub上のイメージを削除する

2-3どこでも使えるイメージを作る

構築するWebアプリの構成

環境変数を使ったイメージのパラメータ

アプリで環境変数を利用する

環境変数を使って設定ファイルを作成する

環境変数ファイルを利用する

2-4Ansibleを使ってDockerホストを構築する

リモートのDockerホストを使う

AnsibleでDockerホストを作成する

3Dockerネットワークとストレージ

3-1Dockerネットワークを使いこなそう

3-2データ揮発性とデータ永続性をしろう

3-3 WordPressをデータ永続化しよう

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