Docker tips & tricks

Système
  1. 1. Install latest docker & docker-compose
  2. 2. Configure proxy for docker
  3. 3. Change data directory & activate logrotate
  4. 4. Clean by filter orphan images or regex container
  5. 5. Import many images from directory, apply tag by date and latest, and push to registry
  6. 6. Dockerfile exemple multi-tool container

Install latest docker & docker-compose

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curl -sSL https://get.docker.com/ | sh
curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Configure proxy for docker

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mkdir -p /etc/systemd/system/docker.service.d
PROXY_URL='http:/USER:PASS@PROXY:PORT'
echo -e "[Service] \nEnvironment=\"HTTPS_PROXY=${PROXY_URL}\"\nEnvironment=\"NO_PROXY=localhost,127.0.0.1,${HOSTNAME}\"" > /etc/systemd/system/docker.service.d/http-proxy.conf
systemctl daemon-reload && systemctl restart docker

Change data directory & activate logrotate

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mkdir -p /etc/docker/ /data
echo -e "{\"data-root\": \"/data/docker\",\"log-driver\": \"json-file\", \"log-opts\": { \"max-size\": \"100m\",\"max-file\": \"5\" }}}" | tee /etc/docker/daemon.json
systemctl daemon-reload && systemctl enable docker && systemctl restart docker

Clean by filter orphan images or regex container

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docker rmi $(docker images -q -f 'dangling=true') 2> /dev/null || true
docker rm -f $(docker ps -aq -f 'name=NAME*') 2> /dev/null || true

Import many images from directory, apply tag by date and latest, and push to registry

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Livraisons="2018-10-10 2019-01-21 2019-03-21 2019-03-26 2019-04-10 2019-04-11"

for livraison in $Livraisons;do
	for image in $(ls $IMAGES_PATH/$livraison/*.tar); do 
		name=$(docker load -q -i $image | awk '{print $3}');
		newtag=$(basename $name | sed -e "s/:.*$/:$(basename $(dirname $image))/g")
		latesttag=$(basename $name | sed -e 's/:.*$/:latest/g')
		docker tag $name $DOCKER_REGISTRY/$newtag; 
		docker tag $name $DOCKER_REGISTRY/$latesttag
		docker push $DOCKER_REGISTRY/$newtag 
		docker push $DOCKER_REGISTRY/$latesttag
		docker rmi $name >/dev/null; 
		echo -e "\n==> image $DOCKER_REGISTRY/$newtag imported\n"; 
	done
done

Dockerfile exemple multi-tool container

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### Input variables ##
ARG http_proxy
ARG https_proxy
ARG no_proxy 

## put arg as env for futur use
ENV http_proxy=$http_proxy
ENV https_proxy=$https_proxy
ENV no_proxy=$no_proxy

# System Env
ENV TERM=xterm
ENV LC_ALL=C.UTF-8
ENV DEBIAN_FRONTEND=noninteractive

# Package Env
ENV INSTALL="apt-utils software-properties-common vim dos2unix sqlite3 mysql-server mysql-client libpcre3-dev apache2 php-pear php-pecl-http maven"
ENV INSTALL_PHP="5.5 5.6 7.0 7.2"
ENV INSTALL_PHP_MODULES="xml mysql http mcrypt sqlite3 mbstring curl cli gd dev intl xsl memcache memcached zip apc"
ENV INSTALL_JAVA="openjdk-8-jdk openjdk-8-jre"
ENV INSTALL_NODEJS="8 9 10 11 12"

# Download others packages
RUN apt-get update -y && apt-get install -y software-properties-common apt-transport-https lsb-release

# Download the signing key for php repo
RUN wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg

# Add repo for php packages
RUN echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list && apt-get update -y

# Add nvm for nodejs managing
RUN wget -O install.sh  https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh; bash install.sh

# Installing packages
# System packages
RUN /bin/bash -c 'for packages in ${INSTALL[@]};do apt-get install -y ${packages} ;done'

# Php & php modules packages
RUN /bin/bash -c 'for php_version in ${INSTALL_PHP[@]};do apt-get install -y php${php_version} ; for php_modules in ${INSTALL_PHP_MODULES[@]};do apt-get install -y php${php_version}-${php_modules} ;done ;done'

# Java packages
RUN /bin/bash -c 'for java_version in ${INSTALL_JAVA[@]};do apt-get install -y ${java_version} ;done'

# Nodejs packages
RUN /bin/bash -c 'source ~/.profile 2>/dev/null; for node_version in ${INSTALL_NODEJS[@]};do nvm install ${node_version} ;done'


tips & tricks docker
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