# Docker 拾遗

# 安装

# redhat安装

• https://linuxconfig.org/how-to-install-docker-in-rhel-8
  • yum install yum-utils
  • yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
  • yum list docker-ce --showduplicates | sort -r
  • yum install docker-ce
  • systemctl enable --now docker
  • systemctl is-active docker && systemctl is-enabled docker
  • sudo curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
  • sudo chmod +x /usr/local/bin/docker-compose
  • docker run --rm hello-world

# 其他安装

• curl -sSL https://get.docker.com | sh

# 中国安装

• curl -sSL https://get.daocloud.io/docker | sh

# 构建镜像从Dockerfile

docker build . -f Dockerfile
docker-composer build .

# build with arg

# https://stackoverflow.com/questions/43654656/dockerfile-if-else-condition-with-external-arguments/43656644
# docker build -t my_docker .  --build-arg action=deploy
# docker-compose build --build-arg action=deploy

# 删除镜像

docker image rm -f vuepress docker rmi $(docker images -q -f dangling=true) #虚悬镜像(dangling image)

# 导出镜像

docker image save vuepress:latest -o /tmp/vuepress.docker.image

# 导入镜像

docker load < /tmp/vuepress.docker.image

docker import /tmp/vuepress.docker.image vuepress
docker import http://example.com/exampleimage.tgz example/imagerepo

# pull/push镜像

docker login
...
docker push vuepress-image

# 设置时区和host相同 https://serverfault.com/a/683651

# docker-compose.yml方式

ubuntu 为host

volumes:
  - "/etc/timezone:/etc/timezone:ro"
  - "/etc/localtime:/etc/localtime:ro"

# Dockerfile方式

ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

或 (适用于alpine)

RUN apk add --no-cache tzdata
ENV TZ America/Los_Angeles