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System.loadLibrary() 和 System.load() 的区别

年夜雪 2023-06-26 阅读 67
docker

使用docker管理容器:

理解下容器、镜像、仓库、docker daemon和docker client三者之间的关系:

总结:

1)docker客户端下达命令docker daemon。

2)docker daemon 先到本地镜像目录查找容器,如果没有,则到镜像仓库下载镜像到本地,然后在通过这个镜像启动容器。

3)docker daemon借助于镜像启动容器。

启动容器:

验证是否有镜像在本地:

docker images

本地没有镜像,需要到默认仓库中search:

[root@vm1 ~]# docker search centos
NAME                                         DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
centos                                       DEPRECATED; The official build of CentOS.       7601      [OK]
kasmweb/centos-7-desktop                     CentOS 7 desktop for Kasm Workspaces            38
bitnami/centos-base-buildpack                Centos base compilation image                   0                    [OK]
couchbase/centos7-systemd                    centos7-systemd images with additional debug…   8                    [OK]
continuumio/centos5_gcc5_base                                                                3
datadog/centos-i386                                                                          0
dokken/centos-7                              CentOS 7 image for kitchen-dokken               5

默认仓库:dockerhub

本地没有镜像,需要下载镜像到本地:

[root@vm1 ~]# docker pull centos:latest
latest: Pulling from library/centos
a1d0c7532777: Pull complete
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest
docker.io/library/centos:latest

通过docker images进行检查镜像: 

docker images

运行容器:

docker run -it --name=c1 centos:latest /bin/bash

 

[root@vm1 ~]# docker run -it --name=c1 centos:latest /bin/bash
[root@d6bfe9c8a0d8 /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
[root@d6bfe9c8a0d8 /]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
4: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@d6bfe9c8a0d8 /]#

-it:  终端交互。

容器:是隔离出来的空间。

镜像:是不可写。

查看正在运行的容器:


# 查看正在运行的容器
docker ps
docker ps -a
docker ps --all

# 停止一个正在运行的容器,d是容器ID的简写,也可以写容器的名称,但是ID要能够唯一被识别
docker stop d

# 关闭多个正在运行的容器:
docker stop c1 c2

# 启动容器
docker start c1



# 开启已停止的容器
docker start c1

# docker attach --help

[root@vm1 ~]# docker attach --help

Usage:  docker attach [OPTIONS] CONTAINER

Attach local standard input, output, and error streams to a running container

Options:
      --detach-keys string   Override the key sequence for detaching a container
      --no-stdin             Do not attach STDIN
      --sig-proxy            Proxy all received signals to the process (default true)

# 进入到容器,但是不能进入到一个停止的容器
docker attach c1

# 删除已停止的容器
[root@vm1 ~]# docker ps
CONTAINER ID   IMAGE           COMMAND       CREATED             STATUS         PORTS     NAMES
13ebf1339635   centos:latest   "/bin/bash"   About an hour ago   Up 5 minutes             c1
273f4d145387   centos:latest   "/bin/bash"   2 hours ago         Up 2 hours               c2
[root@vm1 ~]# docker rm c1
Error response from daemon: You cannot remove a running container 13ebf1339635ea9c78440b9781aae1dd5a6c5b581baf014cfb49be4a89b8a769. Stop the container before attempting removal or force remove

# 停止容器
docker stop c1

# 删除容器
docker rm c1

我们理解下这句话:

Attach local standard input, output, and error streams to a running container

附加本地标准输入输出和错误输出到一个正在运行的容器。

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