docker snippets, dockerminimal, dockerstarter, dockersandbox, dockersnippet, zombi, inmortal

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create a new centos-7

docker run -it centos:centos7

install docker inside it with official steps

https://docs.docker.com/engine/install/centos/#install-using-the-repository

sudo yum install -y yum-utils

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
    
sudo yum install docker-ce docker-ce-cli containerd.io

docker images.md

format images

https://docs.docker.com/engine/reference/commandline/images/#format-the-output https://docs.docker.com/engine/reference/commandline/images/

docker image list --format "table {{.ID}}\t{{.Repository}}\t{{.Tag}}\t{{.Size}}" docker image list --format "table {{.Repository}}\t{{.ID}}\t{{.CreatedAt}}" docker image list --format "table {{.ID}}\t{{.CreatedAt}}"

Format the output

The formatting option (--format) will pretty print container output using a Go template.

Valid placeholders for the Go template are listed below: Placeholder Description .ID Image ID .Repository Image repository .Tag Image tag .Digest Image digest .CreatedSince Elapsed time since the image was created .CreatedAt Time when the image was created .Size Image disk size

clear unused

docker rmi $(docker images -f "dangling=true" -q)

docker inmortal zombi.sh

RUN echo 'while true; do echo "$(date)" && sleep 2; done' > /bootstrap.sh
RUN chmod +x /bootstrap.sh

CMD /bootstrap.sh

docker snippets

docker run -it ubuntu
docker run --name ubuntu -it ubuntu
docker run --name python -it python:2

# build

docker build --rm -t ubuntu_nodejs:10 .
docker build --no-cache --rm -t ubuntu_nodejs:10 .

# run with path

docker run -d --name ruby -v /foo/bar:/opt/app -it ubuntu

# workaround in order to keep a live docker container

while true
do  
  sleep 300
  
## docker show real build log

export BUILDKIT_PROGRESS=plain

docker build --progress=plain -t docs .

services:
    build:
        progress: plain
done


python:2

## remove all except: acme and foo containers

docker rm $(docker ps -a | grep  -v -E "acme|foo" | cut -d ' ' -f1)


### nodejs
docker run -it --name node10 ubuntu 

## docker ps filter

 docker ps -a --format="table {{.Names}}\t{{.Image}}\t{{.Status}}"

Dockerfile minimal live for test

FROM ubuntu

# Create directory
RUN mkdir /testdir
RUN echo "Hello world">> /testdir/hello2.txt

CMD /bin/bash

for git.md

docker run --name ubuntu -it ubuntu
apt update
apt-get install git

hello-world

https://hub.docker.com/r/crccheck/hello-world


docker run -d --rm --name web-test -p 80:8000 crccheck/hello-world