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Docker commands
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docker-commands.md

Docker commands

Display docker version

docker version

Client: Docker Engine - Community
 Cloud integration: 1.0.9
 Version:           20.10.5
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        55c4c88
 Built:             Tue Mar  2 20:13:00 2021
 OS/Arch:           darwin/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.5
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       363e9a8
  Built:            Tue Mar  2 20:15:47 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Build image tagged with test

docker build -t test .

[+] Building 110.4s (12/12) FINISHED                                                                
 => [internal] load build definition from Dockerfile                                           0.0s
 => => transferring dockerfile: 561B                                                           0.0s
 => [internal] load .dockerignore                                                              0.0s
 => => transferring context: 2B                                                                0.0s
 => [internal] load metadata for docker.io/library/node:12.16-alpine                           1.3s
 => [internal] load build context                                                              3.2s
 => => transferring context: 87.42MB                                                           3.2s
 => [1/7] FROM docker.io/library/node:12.16-alpine@sha256:84f5c9090cc741421b2376b2393e7d5fa2f  0.0s
 => CACHED [2/7] WORKDIR /src/auth-api                                                         0.0s
 => CACHED [3/7] RUN apk add jq --no-cache && apk update && apk add py-pip --no-cache && pip   0.0s
 => [4/7] COPY . /src/auth-api                                                                 0.4s
 => [5/7] RUN chown -R node:node /src/                                                         0.7s
 => [6/7] RUN chmod +x /src/auth-api/docker-entrypoint.sh                                      0.5s
 => [7/7] RUN npm i                                                                           64.1s
 => exporting to image                                                                        40.1s 
 => => exporting layers                                                                       40.0s 
 => => writing image sha256:44454a3901a9b381fcb169bf75fd4c32f24ceabaef243a965678678d8075ab64   0.0s 
 => => naming to docker.io/library/test                                                        0.0s

List all docker images

docker image list

REPOSITORY     TAG        IMAGE ID       CREATED          SIZE
test           latest     1ba7a74a0656   28 seconds ago   492MB
mysql          5.7.32     1b12f2e9257b   4 months ago     448MB
dlo/step-api   latest     caf1ac2690d9   23 months ago    527MB
mongo          latest     a3abd47e8d61   2 years ago      394MB
node           8-alpine   ee8b4f3c67fa   2 years ago      66.3MB

Run docker image named test

docker run test

This will use the CMD specified inside a dockerfile.

The ENTRYPOINT instruction can also be used in combination with a helper script, e.g even when starting it may require more than one step.

Example dockerfile below:

FROM node:12.16-alpine

ARG NPM_TOKEN

WORKDIR /src/auth-api
ENV PORT=8080
EXPOSE 8080

RUN apk add jq --no-cache && apk update && apk add py-pip --no-cache && pip install awscli

COPY . /src/auth-api

RUN chown -R node:node /src/
RUN chmod +x /src/auth-api/docker-entrypoint.sh
USER node

RUN npm i

ENTRYPOINT ["/src/auth-api/docker-entrypoint.sh"]

CMD [\
  "node",\
  "-r", "newrelic",\
  "-r", "source-map-support/register",\
  "-r", "express-async-errors",\
  "--max-http-header-size", "16000",\
  "main.js"\
]

Run interactive shell of docker image named test

docker run -it test sh

NEW_RELIC_LICENSE_KEY not set.
New Relic disabled.
/src/auth-api $ pwd
/src/auth-api
/src/auth-api $ ls -l
total 85560
-rw-r--r--    1 node     node           494 Mar 19 14:17 addEmail.ts
-rw-r--r--    1 node     node           841 Mar 19 14:17 compile.ts
-rwxr-xr-x    1 node     node           440 Mar 19 14:17 docker-entrypoint.sh
-rw-r--r--    1 node     node           517 Mar 19 14:17 dockerfile
-rw-r--r--    1 node     node           725 Mar 19 14:17 forgotPassword.ts
drwxr-xr-x    1 node     node          4096 Mar 19 14:18 html
-rw-r--r--    1 node     node          1124 Mar 19 14:17 inviteEmail.ts
-rw-r--r--    1 node     node           384 Mar  4 14:56 lastGenerated-verify-email.json
-rw-r--r--    1 node     node           136 Mar  4 14:56 lastSelfSignup.json
-rw-r--r--    1 node     node       2796743 Mar 19 14:17 main.js
-rw-r--r--    1 node     node       6925578 Mar 19 14:17 main.js.map
drwxr-xr-x  395 node     node         16384 Mar 19 14:19 node_modules
-rw-r--r--    1 node     node        162963 Mar 19 14:19 package-lock.json
-rw-r--r--    1 node     node          2623 Mar 19 14:19 package.json
-rw-r--r--    1 node     node      23676032 Mar 19 14:17 query-engine-darwin
-rw-r--r--    1 node     node      28312016 Mar 19 14:17 query-engine-linux-musl
-rw-r--r--    1 node     node      25655648 Mar 19 14:17 query-engine-rhel-openssl-1.0.x
-rw-r--r--    1 node     node          3851 Mar 19 14:17 schema.prisma
-rw-r--r--    1 node     node           382 Mar 19 14:17 utils.ts
/src/auth-api $

Use docker-compose.yml file

docker-compose up

Starting data_db_1 ... done
Attaching to data_db_1
db_1  | 2021-03-19 14:31:14+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.32-1debian10 started.
db_1  | 2021-03-19 14:31:14+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
db_1  | 2021-03-19 14:31:14+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.32-1debian10 started.
db_1  | 2021-03-19 14:31:15+00:00 [Note] [Entrypoint]: Initializing database files
db_1  | 2021-03-19T14:31:15.075700Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
db_1  | 2021-03-19T14:31:15.098256Z 0 [Warning] Setting lower_case_table_names=2 because file system for /var/lib/mysql/ is case insensitive
db_1  | 2021-03-19T14:31:18.297348Z 0 [Warning] InnoDB: New log files created, LSN=45790
db_1  | 2021-03-19T14:31:19.267544Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
db_1  | 2021-03-19T14:31:19.418249Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: c53d0b6c-88bf-11eb-bece-0242ac130002.
db_1  | 2021-03-19T14:31:19.434946Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
db_1  | 2021-03-19T14:31:24.002366Z 0 [Warning] CA certificate ca.pem is self signed.
db_1  | 2021-03-19T14:31:24.948274Z 1 [Warning] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
^CGracefully stopping... (press Ctrl+C again to force)
Stopping data_db_1 ... 
Killing data_db_1  ... done
Raw
running-docker-images.md

Build, tag image and run image

  1. Build and tag image docker build -t marketing-cms .
  2. See below for different ways on running a docker image

Persist pwd inside project-name directory

docker run -it \
-e DATABASE_CLIENT=mysql \
-e DATABASE_NAME=marketing_cms \
-e DATABASE_HOST=0.0.0.0 \
-e DATABASE_PORT=3306 \
-e DATABASE_USERNAME=root \
-e DATABASE_PASSWORD=root \
-e DATABASE_SSL=false \
-p 1337:1337 \
-v `pwd`/project-name:/srv/app \
marketing-cms

Run image and connect to localhost and port

Use host.docker.internal to connect with localhost

docker run -it \
-e DATABASE_CLIENT=mysql \
-e DATABASE_NAME=marketing_cms \
-e DATABASE_HOST=host.docker.internal \
-e DATABASE_PORT=3306 \
-e DATABASE_USERNAME=root \
-e DATABASE_PASSWORD=root \
-e DATABASE_SSL=false \
-p 1337:1337 \
marketing-cms

Run image with SH

docker run -it \
-e DATABASE_CLIENT=mysql \
-e DATABASE_NAME=marketing_cms \
-e DATABASE_HOST=127.0.0.1 \
-e DATABASE_PORT=3306 \
-e DATABASE_USERNAME=root \
-e DATABASE_PASSWORD=root \
-e DATABASE_SSL=false \
-p 1337:1337 \
-p 3306:3306 \
marketing-cms sh
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