jpuyy的网志

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  • python smtplib 发邮件

    http://www.mkyong.com/python/how-do-send-email-in-python-via-smtplib/

  • centos7 python 升级

    脚本

    #!/bin/bash

yum install -y gcc make
cd /usr/src
curl -O https://www.python.org/ftp/python/2.7.12/Python-2.7.12.tgz
tar xzf Python-2.7.12.tgz
cd Python-2.7.12
./configure
make altinstall

    CentOS 7 安装 python 3.6.5

    sudo yum install -y https://centos7.iuscommunity.org/ius-release.rpm
sudo yum install -y python36u python36u-libs python36u-devel python36u-pip

    CentOS 7.7, Python 3 is available in the base package repository

    # cat /etc/redhat-release 
CentOS Linux release 7.7.1908 (Core)
# yum install -y python3 python3-devel

  • Dockerfile

    CMD

    CMD 是 docker 启动时运行的命令，在 Dockerfile 中只能指定一条 CMD 命令

    EXPOSE

    暴露端口

  • docker 镜像

    查看本地 docker 镜像

    docker images

    查看 repositories

    curl -XGET http://127.0.0.1:5000/v2/_catalog

    查找 registry 中的镜像

    docker search ansible

    删除所有镜像

    docker rmi `docker images -a -q`

  • 运行docker容器

    运行一个 centos 容器
    The -i and -t flags can be passed to the exec command to keep an interactive shell open, and you can specify the shell you want to attach after the container ID.

    [root@localhost ~]# docker run  -i -t centos /bin/bash
Unable to find image 'centos:latest' locally
latest: Pulling from library/centos
8d30e94188e7: Pull complete 
Digest: sha256:2ae0d2c881c7123870114fb9cc7afabd1e31f9888dac8286884f6cf59373ed9b
Status: Downloaded newer image for centos:latest

    运行 docker 以 daemon 方式运行，host 开放端口 5001，对应容器内端口 5000
    The -p means “publish ports”

    docker run -d -p 5001:5000 python-flask

    查看信息

    docker info
Containers: 1
 Running: 0
 Paused: 0
 Stopped: 1
Images: 1

    查看容器列表

    docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES
ebf5f9bf4bc9        centos              "/bin/bash"         16 minutes ago      Exited (0) 7 minutes ago                       furious_leakey

    查看 docker 运行的 log

    docker logs  furious_leakey

    探测 docker 更详尽信息，json 输出

    docker inspect furious_leakey

    退出后的容器是 stopped 状态，现在根据名字 furious_leakey 启动它

    docker start furious_leakey

    通过 shell 进入到容器中

    docker attach furious_leakey

    上面运行的容器是交互式容器

    docker工作目录在

    /var/lib/docker/

    容器存放在

    /var/lib/docker/containers

    删除所有 docker 容器

    docker rm `docker ps -a -q`

    进入到运行中的 docker

    docker exec -i -t 82d98bdf2d77046ce52a61f2bab27465db868a97faebe94a83581fc0322e4c26 /bin/bash

    docker ps 只显示容器名

    docker ps -a --format '{{ .Names }}'

    docker 及对应的所有 ip

    docker inspect --format='{{.Name}} - {{range .NetworkSettings.Networks}} {{.IPAddress}} {{end}}' $(docker ps -aq)

  • centos7 docker 安装

    在 centos7 下，安装

    curl -s https://get.docker.com/ | sh

    启动并设置开机启动

    systemctl start docker.service
systemctl enable docker.service

    检查 docker 状态

    docker info
    systemctl status docker