制作容器
基于容器做镜像
dockerfile
===============================================
Dockerfile Format
1、不区分大小写
2、从上倒下执行（非注释行）
3、必须指定一个基础镜像
formart
#comment
INSTRUCTION arguments
===============================================
工作逻辑
专用目录
Dockerfile首字母大写，在Dockerfile中不区分大小写，推大写
需要引用的文件必须是当前目录或者之下的目录
.dockeringore--排除，排除之后就不再打包到容器
docker build
指令
FROM --最重要的，第一个非注释的行，用于为映像文件构建过程指定的基准镜像。默认情况docker build会在docker主机上查找镜像文件，如果不存在去Docker hub Registry上拉。
MAINTANIER(depreacted)--用于提供相关信息
LABEL--用于提供相关信息 替代MAINTANIER
COPY--用于从Docker主机复制文件到创建的新映像文件 COPY src ..des或者 COPY ["src" "dest"]，目录自己不会被复制，下面的文件或者字幕了会被复制。
ADD--类是于copy指令，ADD支持使用tar文件和url路径，同copy、解压、URL（直接下载）build使用默认值
WORKDIR--指出目录相当于环境变量 工作目录
VOLUME--用于在image中创建挂载点
EXPOSE--暴露端口,不是直接暴露，如果需要暴露需要加-P，默认是tcp
ENV--用于为镜像定位所需要的环境变量，并可被Dockerfile文件中位于其后的其他指令所调用 ENV key value或者ENV key=value..key1=value1...
两者都是运行命令的
RUN--当你基于dockerfile构建镜像时,docker build过程。RUN逐一运行
CMD--用于把镜像启动为容器时，docker run过程 CMD只能有一个生效。CMD command
ENTRYPOINT-类是CMD，用于为容器指定默认运行程序，和CMD不同的是不会被docker run中的命令覆盖。和CMD联合使用，这样可以传参数，shell可以使用
USER--用于指定运行image时活运行Dockerfile中任何RUN、CMD、ENTRYPOINT指令指定的程序的用户名和UID,默认情况下container运行身份是root
HEALTHCHECK--健康状态检查，默认30s检查一次，timeout时间30s 0（success）、1（unhealthy）、2（reserved）
shell--运行程序默程序，使用的较少
STOHSIGNAL--发送信号给容器 使用较少
ARG--和ENV很像，只是在build过程中使用，--build-arg，一个dcokerfile使用较多的场景
ONBUILD--用于dockerfile中定义触发器，延时执行，做成一个镜像，被别人用作基础竟像的时候执行，onbuild不能自我嵌套，而且不能触发FROM和MAINTAINER指令。
注意
能把一条指令成一条，尽量一条
json数组中要使用双引号
以下是一条一条指令实验
==============================================
实验
[root@localhost ~]# mkdir img1
[root@localhost ~]# cd img1
[root@localhost img1]# vi Dockerfile
#Des:test image
FROM busy:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
[root@localhost img1]# docker build -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker build [OPTIONS] PATH | URL | -
Build an image from a Dockerfile
Options:
--add-host list Add a custom host-to-IP mapping (host:ip)
--build-arg list Set build-time variables
--cache-from strings Images to consider as cache sources
--cgroup-parent string Optional parent cgroup for the container
--compress Compress the build context using gzip
--cpu-period int Limit the CPU CFS (Completely Fair Scheduler) period
--cpu-quota int Limit the CPU CFS (Completely Fair Scheduler) quota
-c, --cpu-shares int CPU shares (relative weight)
--cpuset-cpus string CPUs in which to allow execution (0-3, 0,1)
--cpuset-mems string MEMs in which to allow execution (0-3, 0,1)
--disable-content-trust Skip image verification (default true)
-f, --file string Name of the Dockerfile (Default is 'PATH/Dockerfile')
--force-rm Always remove intermediate containers
--iidfile string Write the image ID to the file
--isolation string Container isolation technology
--label list Set metadata for an image
-m, --memory bytes Memory limit
--memory-swap bytes Swap limit equal to memory plus swap: '-1' to enable unlimited swap
--network string Set the networking mode for the RUN instructions during build (default "default")
--no-cache Do not use cache when building the image
--pull Always attempt to pull a newer version of the image
-q, --quiet Suppress the build output and print image ID on success
--rm Remove intermediate containers after a successful build (default true)
--security-opt strings Security options
--shm-size bytes Size of /dev/shm
-t, --tag list Name and optionally a tag in the 'name:tag' format
--target string Set the target build stage to build.
--ulimit ulimit Ulimit options (default [])
开始构建
[root@localhost img1]# docker build -t wolfhttpd:v0.1-1 ./ -t直接打上tag
Sending build context to Docker daemon 3.072kB
Step 1/3 : FROM busybox:latest
---> 59788edf1f3e
Step 2/3 : MAINTAINER "wolf <1098331428@qq.com>"
---> Running in 3d8b6d6624f6
Removing intermediate container 3d8b6d6624f6
---> 6eab500a1260
Step 3/3 : COPY index.html /data/web/html/
---> 889882d019f9
Successfully built 889882d019f9
Successfully tagged wolfhttpd:v0.1-1
查看
[root@localhost img1]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
wolfhttpd v0.1-1 889882d019f9 42 seconds ago 1.15MB
查看是否成功
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-1 cat /data/web/html/index.html
<h1>wolf container no 1</h1>
[root@localhost img1]#
----------------------------------------
实验2
[root@localhost img1]# ll
total 12
-rw-r--r--. 1 root root 186 Dec 26 22:43 Dockerfile
-rw-r--r--. 1 root root 29 Dec 26 22:34 index.html
drwxr-xr-x. 2 root root 4096 Dec 26 22:42 yum.repos.d
[root@localhost img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/ 加一行，这里目录如果相同，尽量和上一条整合，这里惜字如金
[root@localhost img1]# docker build -t wolfhttpd:v0.1-2 ./
Sending build context to Docker daemon 20.48kB
Step 1/4 : FROM busybox:latest
---> 59788edf1f3e
Step 2/4 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> 6eab500a1260
Step 3/4 : COPY index.html /data/web/html/
---> Using cache
---> 889882d019f9
Step 4/4 : COPY yum.repos.d /etc/yum.repos.d/
---> bd5594568203
Successfully built bd5594568203
Successfully tagged wolfhttpd:v0.1-2
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-2 ls /etc/yum.repos.d/
CentOS-Base.repo
CentOS-CR.repo
CentOS-Debuginfo.repo
CentOS-Media.repo
CentOS-Sources.repo
CentOS-Vault.repo
CentOS-fasttrack.repo
docker-ce.repo
[root@localhost img1]#
--------------------------------------------
实验3
[root@localhost img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
[root@localhost img1]# docker build -t wolfhttpd:v0.1-3 ./
Sending build context to Docker daemon 20.48kB
Step 1/5 : FROM busybox:latest
---> 59788edf1f3e
Step 2/5 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> 6eab500a1260
Step 3/5 : COPY index.html /data/web/html/
---> Using cache
---> 889882d019f9
Step 4/5 : COPY yum.repos.d /etc/yum.repos.d/
---> Using cache
---> bd5594568203
Step 5/5 : ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
Downloading [==================================================>] 1.028MB/1.028MB
---> ad866f098832
Successfully built ad866f098832
Successfully tagged wolfhttpd:v0.1-3
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-3 ls /usr/local/src
nginx-1.15.8.tar.gz
---------------------------------------------
实验4
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
#ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
ADD nginx-1.15.8.tar.gz /usr/local/src/ 相当与直接tar -xzvf -C
[root@localhost img1]# docker build -t wolfhttpd:v0.1-4 ./
Sending build context to Docker daemon 1.049MB
Step 1/5 : FROM busybox:latest
---> 59788edf1f3e
Step 2/5 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> 6eab500a1260
Step 3/5 : COPY index.html /data/web/html/
---> Using cache
---> 889882d019f9
Step 4/5 : COPY yum.repos.d /etc/yum.repos.d/
---> Using cache
---> bd5594568203
Step 5/5 : ADD nginx-1.15.8.tar.gz /usr/local/src/
---> 7d6d799fd70e
Successfully built 7d6d799fd70e
Successfully tagged wolfhttpd:v0.1-4
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-3 ls /usr/local/src
nginx-1.15.8.tar.gz
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-4 ls /usr/local/src
nginx-1.15.8
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-4 ls /usr/local/src/nginx-1.15.8
CHANGES
CHANGES.ru
LICENSE
README
auto
conf
configure
contrib
html
man
src
------------------------------------------------
实验5
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
#ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
WORKDIR /usr/local/src
ADD nginx-1.15.8.tar.gz ./
---------------------------------------------
实验6
[root@localhost img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
#ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
WORKDIR /usr/local/
ADD nginx-1.15.8.tar.gz ./src/
VOLUME /data/mysql/
[root@localhost img1]# docker build -t wolfhttpd:v0.1-5 ./
Sending build context to Docker daemon 1.049MB
Step 1/7 : FROM busybox:latest
---> 59788edf1f3e
Step 2/7 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> 6eab500a1260
Step 3/7 : COPY index.html /data/web/html/
---> Using cache
---> 889882d019f9
Step 4/7 : COPY yum.repos.d /etc/yum.repos.d/
---> Using cache
---> bd5594568203
Step 5/7 : WORKDIR /usr/local/
---> Running in e24c83599eb5
Removing intermediate container e24c83599eb5
---> 12096bece293
Step 6/7 : ADD nginx-1.15.8.tar.gz ./src/
---> 71446b44e1ec
Step 7/7 : VOLUME /data/mysql/
---> Running in ae36a4d7a641
Removing intermediate container ae36a4d7a641
---> af03cafbdaf9
Successfully built af03cafbdaf9
Successfully tagged wolfhttpd:v0.1-5
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-5 mount
rootfs on / type rootfs (rw)
/dev/mapper/docker-253:0-67471500-bbdfc0105478f9acc328e239abbde32f0b21f55e3b5eb3e9fbab445465c424e9 on / type xfs (rw,seclabel,relatime,nouuid,attr2,inode64,logbsize=64k,sunit=128,swidth=128,noquota)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=666)
sysfs on /sys type sysfs (ro,seclabel,nosuid,nodev,noexec,relatime)
tmpfs on /sys/fs/cgroup type tmpfs (ro,seclabel,nosuid,nodev,noexec,relatime,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (ro,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (ro,nosuid,nodev,noexec,relatime,cpuacct,cpu)
cgroup on /sys/fs/cgroup/blkio type cgroup (ro,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/devices type cgroup (ro,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/perf_event type cgroup (ro,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/net_cls type cgroup (ro,nosuid,nodev,noexec,relatime,net_cls)
cgroup on /sys/fs/cgroup/freezer type cgroup (ro,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/memory type cgroup (ro,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (ro,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/cpuset type cgroup (ro,nosuid,nodev,noexec,relatime,cpuset)
mqueue on /dev/mqueue type mqueue (rw,seclabel,nosuid,nodev,noexec,relatime)
/dev/mapper/centos-root on /data/mysql type xfs (rw,seclabel,relatime,attr2,inode64,noquota) 这里挂载上了 或者使用docker inspect 命令查看
/dev/mapper/centos-root on /etc/resolv.conf type xfs (rw,seclabel,relatime,attr2,inode64,noquota)
/dev/mapper/centos-root on /etc/hostname type xfs (rw,seclabel,relatime,attr2,inode64,noquota)
/dev/mapper/centos-root on /etc/hosts type xfs (rw,seclabel,relatime,attr2,inode64,noquota)
shm on /dev/shm type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=65536k)
proc on /proc/bus type proc (ro,relatime)
proc on /proc/fs type proc (ro,relatime)
proc on /proc/irq type proc (ro,relatime)
proc on /proc/sys type proc (ro,relatime)
proc on /proc/sysrq-trigger type proc (ro,relatime)
tmpfs on /proc/acpi type tmpfs (ro,seclabel,relatime)
tmpfs on /proc/kcore type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
tmpfs on /proc/keys type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
tmpfs on /proc/timer_list type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
tmpfs on /proc/timer_stats type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
tmpfs on /proc/sched_debug type tmpfs (rw,seclabel,nosuid,size=65536k,mode=755)
tmpfs on /proc/scsi type tmpfs (ro,seclabel,relatime)
tmpfs on /sys/firmware type tmpfs (ro,seclabel,relatime)
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-5 sleep 60
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-5 sleep 60
[root@localhost img1]# docker inspect wolfhttpd
-------------------------------------------------
实验7
[root@localhost img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
#ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
WORKDIR /usr/local/
ADD nginx-1.15.8.tar.gz ./src/
VOLUME /data/mysql/
EXPOSE 80/tcp 默认是tcp，不加/tcp也是tcp
[root@localhost img1]# docker build -t wolfhttpd:v0.1-6 ./
Sending build context to Docker daemon 1.049MB
Step 1/8 : FROM busybox:latest
---> 59788edf1f3e
Step 2/8 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> 6eab500a1260
Step 3/8 : COPY index.html /data/web/html/
---> Using cache
---> 889882d019f9
Step 4/8 : COPY yum.repos.d /etc/yum.repos.d/
---> Using cache
---> bd5594568203
Step 5/8 : WORKDIR /usr/local/
---> Using cache
---> 12096bece293
Step 6/8 : ADD nginx-1.15.8.tar.gz ./src/
---> Using cache
---> 71446b44e1ec
Step 7/8 : VOLUME /data/mysql/
---> Using cache
---> af03cafbdaf9
Step 8/8 : EXPOSE 80/tcp
---> Running in aae5fffbe049
Removing intermediate container aae5fffbe049
---> 44c7bf47977c
Successfully built 44c7bf47977c
Successfully tagged wolfhttpd:v0.1-6
[root@localhost img1]# docker run --name wolfweb01 --rm wolfhttpd:v0.1-6 /bin/httpd -f -h /data/web/html
[root@master ~]# docker inspect -f {{.NetworkSettings.IPAddress}} wolfweb01
172.17.0.6
换个窗口curl
[root@master ~]# curl 172.17.0.6
<h1>wolf container no 1</h1>
[root@master ~]# docker port wolfweb01 这里并没有暴露端口，所以这里只能本机通过本机访问
-------------------------------------------------
实验8 真正暴露端口-P
[root@master img1]# docker run --name wolfweb01 --rm -P wolfhttpd:v0.1-6 /bin/httpd -f -h /data/web/html
[root@master ~]# docker port wolfweb01
80/tcp -> 0.0.0.0:32768
这是浏览器访问http://10.249.100.206:32768/
-------------------------------------------------
实验9
[root@master img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
ENV DOC_ROOT=/data/web/html/ \
WEB_SERVER_PACKAGE="nginx-1.15.8"
COPY index.html ${DOC_ROOT:-/data/web/html/} 这样写是怕没有这个目录
#COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
#ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
WORKDIR /usr/local/
#ADD nginx-1.15.8.tar.gz ./src/
ADD ${WEB_SERVER_PACKAGE}.tar.gz ./src/
VOLUME /data/mysql/
EXPOSE 80/tcp
[root@master img1]# docker build -t wolfhttpd:0.1-7 ./
Sending build context to Docker daemon 1.049MB
Step 1/9 : FROM busybox:latest
---> 758ec7f3a1ee
Step 2/9 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> ac9b8947e7a1
Step 3/9 : ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8"
---> Running in 38efbb376b04
Removing intermediate container 38efbb376b04
---> 8810786c11b6
Step 4/9 : COPY index.html ${DOC_ROOT:-/data/web/html/}
---> 9f57c2ee48bf
Step 5/9 : COPY yum.repos.d /etc/yum.repos.d/
---> 99cbe9167ad6
Step 6/9 : WORKDIR /usr/local/
---> Running in 920d94f8ea09
Removing intermediate container 920d94f8ea09
---> ea1b2f88aef7
Step 7/9 : ADD ${WEB_SERVER_PACKAGE}.tar.gz ./src/
---> 4979716938e1
Step 8/9 : VOLUME /data/mysql/
---> Running in e1d09b8aba0e
Removing intermediate container e1d09b8aba0e
---> 34345593b60c
Step 9/9 : EXPOSE 80/tcp
---> Running in 53472b7b520a
Removing intermediate container 53472b7b520a
---> 0e2df844f402
Successfully built 0e2df844f402
Successfully tagged wolfhttpd:0.1-7
[root@master img1]# docker run --name wolfweb01 --rm -P wolfhttpd:0.1-7 ls /usr/local/src/
nginx-1.15.8
[root@master img1]# docker run --name wolfweb01 --rm -P wolfhttpd:0.1-7 ls /usr/local/src/nginx-1.15.8/
CHANGES
CHANGES.ru
LICENSE
README
auto
conf
configure
contrib
html
man
src
[root@master img1]# docker run --name wolfweb01 --rm -P wolfhttpd:0.1-7 ls /data/web/html
index.html
----------------------------------------------------
实验10
[root@master img1]# docker run --help
Usage: docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
Run a command in a new container
Options:
--add-host list Add a custom host-to-IP mapping (host:ip)
-a, --attach list Attach to STDIN, STDOUT or STDERR
--blkio-weight uint16 Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)
--blkio-weight-device list Block IO weight (relative device weight) (default [])
--cap-add list Add Linux capabilities
--cap-drop list Drop Linux capabilities
--cgroup-parent string Optional parent cgroup for the container
--cidfile string Write the container ID to the file
--cpu-period int Limit CPU CFS (Completely Fair Scheduler) period
--cpu-quota int Limit CPU CFS (Completely Fair Scheduler) quota
--cpu-rt-period int Limit CPU real-time period in microseconds
--cpu-rt-runtime int Limit CPU real-time runtime in microseconds
-c, --cpu-shares int CPU shares (relative weight)
--cpus decimal Number of CPUs
--cpuset-cpus string CPUs in which to allow execution (0-3, 0,1)
--cpuset-mems string MEMs in which to allow execution (0-3, 0,1)
-d, --detach Run container in background and print container ID
--detach-keys string Override the key sequence for detaching a container
--device list Add a host device to the container
--device-cgroup-rule list Add a rule to the cgroup allowed devices list
--device-read-bps list Limit read rate (bytes per second) from a device (default [])
--device-read-iops list Limit read rate (IO per second) from a device (default [])
--device-write-bps list Limit write rate (bytes per second) to a device (default [])
--device-write-iops list Limit write rate (IO per second) to a device (default [])
--disable-content-trust Skip image verification (default true)
--dns list Set custom DNS servers
--dns-option list Set DNS options
--dns-search list Set custom DNS search domains
--entrypoint string Overwrite the default ENTRYPOINT of the image
-e, --env list Set environment variables 这里也可以传值
--env-file list Read in a file of environment variables
--expose list Expose a port or a range of ports
--group-add list Add additional groups to join
--health-cmd string Command to run to check health
--health-interval duration Time between running the check (ms|s|m|h) (default 0s)
--health-retries int Consecutive failures needed to report unhealthy
--health-start-period duration Start period for the container to initialize before starting health-retries countdown (ms|s|m|h) (default 0s)
--health-timeout duration Maximum time to allow one check to run (ms|s|m|h) (default 0s)
--help Print usage
-h, --hostname string Container host name
--init Run an init inside the container that forwards signals and reaps processes
-i, --interactive Keep STDIN open even if not attached
--ip string IPv4 address (e.g., 172.30.100.104)
--ip6 string IPv6 address (e.g., 2001:db8::33)
--ipc string IPC mode to use
--isolation string Container isolation technology
--kernel-memory bytes Kernel memory limit
-l, --label list Set meta data on a container
--label-file list Read in a line delimited file of labels
--link list Add link to another container
--link-local-ip list Container IPv4/IPv6 link-local addresses
--log-driver string Logging driver for the container
--log-opt list Log driver options
--mac-address string Container MAC address (e.g., 92:d0:c6:0a:29:33)
-m, --memory bytes Memory limit
--memory-reservation bytes Memory soft limit
--memory-swap bytes Swap limit equal to memory plus swap: '-1' to enable unlimited swap
--memory-swappiness int Tune container memory swappiness (0 to 100) (default -1)
--mount mount Attach a filesystem mount to the container
--name string Assign a name to the container
--network string Connect a container to a network (default "default")
--network-alias list Add network-scoped alias for the container
--no-healthcheck Disable any container-specified HEALTHCHECK
--oom-kill-disable Disable OOM Killer
--oom-score-adj int Tune host's OOM preferences (-1000 to 1000)
--pid string PID namespace to use
--pids-limit int Tune container pids limit (set -1 for unlimited)
--privileged Give extended privileges to this container
-p, --publish list Publish a container's port(s) to the host
-P, --publish-all Publish all exposed ports to random ports
--read-only Mount the container's root filesystem as read only
--restart string Restart policy to apply when a container exits (default "no")
--rm Automatically remove the container when it exits
--runtime string Runtime to use for this container
--security-opt list Security Options
--shm-size bytes Size of /dev/shm
--sig-proxy Proxy received signals to the process (default true)
--stop-signal string Signal to stop a container (default "SIGTERM")
--stop-timeout int Timeout (in seconds) to stop a container
--storage-opt list Storage driver options for the container
--sysctl map Sysctl options (default map[])
--tmpfs list Mount a tmpfs directory
-t, --tty Allocate a pseudo-TTY
--ulimit ulimit Ulimit options (default [])
-u, --user string Username or UID (format: <name|uid>[:<group|gid>])
--userns string User namespace to use
--uts string UTS namespace to use
-v, --volume list Bind mount a volume
--volume-driver string Optional volume driver for the container
--volumes-from list Mount volumes from the specified container(s)
-w, --workdir string Working directory inside the container
[root@master img1]# docker run --name wolfweb01 --rm -P wolfhttpd:0.1-7 printenv
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=31c4d234e43f
DOC_ROOT=/data/web/html/
WEB_SERVER_PACKAGE=nginx-1.15.8
HOME=/root
直接使用-e，直接向环境变量赋值
[root@master img1]# docker run --name wolfweb01 --rm -P -e WEB_SERVER_PACKAGE="nginx-1.15.1" wolfhttpd:0.1-7 printenv
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=2fadc00a9a21
WEB_SERVER_PACKAGE=nginx-1.15.1
DOC_ROOT=/data/web/html/
HOME=/root
dockerfile优先，走dockerfile，因为已经build了 记成事实
[root@master img1]# docker run --name wolfweb01 --rm -P -e WEB_SERVER_PACKAGE="nginx-1.15.1" wolfhttpd:0.1-7 ls /usr/local/src
nginx-1.15.8
------------------------------------------
实验11
[root@master img1]# cat Dockerfile
#Des:test image
FROM busybox:latest
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
ENV DOC_ROOT=/data/web/html/ \
WEB_SERVER_PACKAGE="nginx-1.15.8.tar.gz"
COPY index.html ${DOC_ROOT:-/data/web/html/}
#COPY index.html /data/web/html/
COPY yum.repos.d /etc/yum.repos.d/
ADD http://nginx.org/download/${WEB_SERVER_PACKAGE} /usr/local/src/
WORKDIR /usr/local/
#ADD nginx-1.15.8.tar.gz ./src/
#ADD ${WEB_SERVER_PACKAGE}.tar.gz ./src/
VOLUME /data/mysql/
EXPOSE 80/tcp
RUN cd /usr/local/src && \
tar -xf ${WEB_SERVER_PACKAGE}
[root@master img1]# docker build -t wolfhttpd:v0.1-9 ./
Sending build context to Docker daemon 1.05MB
Step 1/10 : FROM busybox:latest
---> 758ec7f3a1ee
Step 2/10 : MAINTAINER "wolf <1098331428@qq.com>"
---> Using cache
---> ac9b8947e7a1
Step 3/10 : ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8.tar.gz"
---> Using cache
---> bbf1510d7a94
Step 4/10 : COPY index.html ${DOC_ROOT:-/data/web/html/}
---> Using cache
---> 6330c422bc8d
Step 5/10 : COPY yum.repos.d /etc/yum.repos.d/
---> Using cache
---> 1190a7ace558
Step 6/10 : ADD http://nginx.org/download/${WEB_SERVER_PACKAGE} /usr/local/src/
Downloading [==================================================>] 1.028MB/1.028MB
---> Using cache
---> b2f8fae1ec81
Step 7/10 : WORKDIR /usr/local/
---> Using cache
---> dc6a8cfe7d8b
Step 8/10 : VOLUME /data/mysql/
---> Using cache
---> 0ecf0c724a3d
Step 9/10 : EXPOSE 80/tcp
---> Using cache
---> d579c948cd22
Step 10/10 : RUN cd /usr/local/src && tar -xf ${WEB_SERVER_PACKAGE}
---> Running in ae65619e7d1a
Removing intermediate container ae65619e7d1a
---> fe92824fb737
Successfully built fe92824fb737
Successfully tagged wolfhttpd:v0.1-9
[root@master img1]# docker run --name wolfweb01 --rm -P -it wolfhttpd:v0.1-9 ls /usr/local/src/
nginx-1.15.8 nginx-1.15.8.tar.gz
-----------------------------------------------
#Des:test image
FROM centos
MAINTAINER "wolf <1098331428@qq.com>"
#LABEL maintainer="wolf <1098331428@qq.com>"
RUN yum install -y epel-release && yum makecache && yum install nginx
-----------------------------------------------
shell是内核解释器
RUN command command通常是一个shell命令，且以/bin/sh -c来运行它，这时pid不为1,容器不能接受unix信号。
RUN ["<executable>"，"<param1>","<param2>"] 这里就是pid为1
实验12
[root@master img2]# cat Dockerfile
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
CMD /bin/httpd -f -h ${WEB_DOC_ROOT}
[root@master img2]# docker build -t wolfhttpdv:v0.2-1 ./
这条命令卡住
[root@master img2]# docker run --name wolfweb2 --rm -P -it wolfhttpdv:v0.2-1 这里默认运行pid 1不是shell ，是httpd，不会自动进行交互式接口通信，必须使用exec
[root@master img2]# docker inspect wolfweb2
"Cmd": [
"/bin/sh",
"-c",
"/bin/httpd -f -h ${WEB_DOC_ROOT}"
这里启动的也是httpd
[root@master img2]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e6ca4664152e wolfhttpdv:v0.2-1 "/bin/sh -c '/bin/ht…" 6 minutes ago Up 6 minutes wolfweb2
使用exec进入容器
[root@master img2]# docker exec -it wolfweb2 /bin/sh
/ # ls
bin data dev etc home proc root sys tmp usr var
/ # ps
PID USER TIME COMMAND
1 root 0:00 /bin/httpd -f -h /data/web/html/ 这里httpd为1
8 root 0:00 /bin/sh
16 root 0:00 ps
/ # printenv
WEB_DOC_ROOT=/data/web/html/
HOSTNAME=e6ca4664152e
SHLVL=1
HOME=/root
TERM=xterm
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
/ #
---------------------------------------------------
实验13
[root@master img2]# cat Dockerfile
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
#CMD /bin/httpd -f -h ${WEB_DOC_ROOT}
CMD ["/bin/httpd","-f","-h ${WEB_DOC_ROOT}"] 这里$调用为shell命令，因为默认运行不是shell的子进程，内核不认识shell命令，所以报下面的错误
[root@master img2]# docker build -t wolfhttpd:v0.2-2 ./
[root@master img2]# docker inspect wolfhttpd:v0.2-2
"Cmd": [
"/bin/httpd",
"-f",
"-h ${WEB_DOC_ROOT}"
在启动看看
[root@master img2]# docker run --name wolfhttpd2 -it --rm -P wolfhttpd:v0.2-2
httpd: can't change directory to ' ${WEB_DOC_ROOT}': No such file or directory
修改Dcokerfile
[root@master img2]# cat Dockerfile
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
#CMD /bin/httpd -f -h ${WEB_DOC_ROOT}
CMD ["/bin/sh","-c","/bin/httpd","-f","-h /data/web/html"]
[root@master img2]# docker inspect wolfhttpd:v0.2-4
[root@master img2]# docker run --name wolfhttpd2 -it --rm -P wolfhttpd:v0.2-4
-----------------------------------------------------
实验14
[root@master img2]# cat Dockerfile
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
#CMD /bin/httpd -f -h ${WEB_DOC_ROOT}
#CMD ["/bin/sh","-c","/bin/httpd","-f","-h /data/web/html/"]
ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT
[root@master img2]# docker build -t wolfhttpd:v0.2-5 ./
Sending build context to Docker daemon 2.048kB
Step 1/5 : FROM busybox
---> 758ec7f3a1ee
Step 2/5 : LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
---> Using cache
---> 4561b9069835
Step 3/5 : ENV WEB_DOC_ROOT="/data/web/html/"
---> Using cache
---> 30980cf60d2c
Step 4/5 : RUN mkdir -p $WEB_DOC_ROOT && echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
---> Using cache
---> 86cbdaad823f
Step 5/5 : ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT}
---> Running in 3195bfcc31c9
Removing intermediate container 3195bfcc31c9
---> a8fc3cfbecef
Successfully built a8fc3cfbecef
Successfully tagged wolfhttpd:v0.2-5
[root@master img2]# docker run --name wolfweb2 -it --rm -P wolfhttpd:v0.2-5 这里ok
[root@master img2]# docker run --name wolfweb2 -it --rm -P wolfhttpd:v0.2-5 ls /data/web/html/ 这里卡住，不接受ls
如果要想覆盖，必须加--entrypoint
[root@master img2]# docker run --name wolfweb2 -it --rm -P --entrypoint "ls /data/web/html" wolfhttpd:v0.2-5 ls /data/web/html/
docker: Error response from daemon: OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \"ls /data/web/html\": stat ls /data/web/html: no such file or directory": unknown.
--------------------------------------------------
实验15
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
CMD ["/bin/httpd","-f","-h /data/web/html}"] 这种格式是当作参数传给ENTRYPOINT
ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT}
----------------------------------------------------------
实验16
FROM busybox
LABEL maintainer="MageEdu <1098331428@qq.com>" app="httpd"
ENV WEB_DOC_ROOT="/data/web/html/"
RUN mkdir -p $WEB_DOC_ROOT && \
echo '<h1>busybox httpd server.</h1>' > ${WEB_DOC_ROOT}/index.html
CMD ["/bin/httpd","-f","-h /data/web/html}"] 这里cmd传给entrypoint
ENTRYPOINT ["/bin/sh","-c"] 目的是支持shell
[root@master img2]# docker image inspect wolfhttpd:v0.2-7
"Cmd": [
"/bin/httpd",
"-f",
"-h /data/web/html}"
],
"ArgsEscaped": true,
"Image": "sha256:1df68466a23cd041e94530d512947ac0121123bab70bf554b86e1e1cc4085b25",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": [
"/bin/sh",
"-c"
],
[root@master img2]# docker run --name wolfweb2 -it --rm -P wolfhttpd:v0.2-7
[root@master img2]# docker run --name wolfweb2 -it -P wolfhttpd:v0.2-7 ls /data/
bin data dev etc home proc root sys tmp usr var
[root@master img2]# docker run --name wolfweb2 -it -P wolfhttpd:v0.2-7 "ls /data"
docker: Error response from daemon: Conflict. The container name "/wolfweb2" is already in use by container "f322a3cc561ce75268de999f39768a3caebd39b3ef4d00618cd619a35e08ec7f". You have to remove (or rename) that container to be able to reuse that name.
See 'docker run --help'.
[root@master img2]# docker rm wolfweb2
wolfweb2
[root@master img2]# docker run --name wolfweb2 -it -P wolfhttpd:v0.2-7 "ls /data" 现在可以用ls
web
上面这样组合做，可以传参数被shell解析，容器接受配置要靠
-----------------------------------------------------------------
实验17
[root@master img3]# cat entrypoint.sh
#!/bin/sh
#
cat > /etc/nginx/conf.d/www.conf << EOF
server {
server_name $HOSTNAME;
listen ${IPI:-0.0.0.0}:${PORT:-80};
root ${NGX_DOC_ROOT:-/usr/share/nginx/html};
}
EOF
exec "$@"
[root@master img3]# cat Dockerfile
FROM nginx:1.14-alpine
LABEL maintainer="Wolf <1098331428@qq.com>"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD entrypoint.sh /bin/
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"]
[root@master img3]#
[root@master img3]# docker build -t myweb:v0.3-5 ./
[root@master img3]# docker run --name myweb1 --rm -P myweb:v0.3-5
[root@master img3]# docker exec -it 5e2987969396 /bin/sh
/ # ls
bin dev etc home lib media mnt proc root run sbin srv sys tmp usr var
/ # cat /etc/nginx/conf.d/www.conf
server {
server_name 5e2987969396;
listen 0.0.0.0:80;
root /data/web/html/;
}
/ #
--------------------------------------------------------
实验18
加上主页
[root@master img3]# cat Dockerfile
FROM nginx:1.14-alpine
LABEL maintainer="Wolf <1098331428@qq.com>"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD index.html ${NGX_DOC_ROOT}
ADD entrypoint.sh /bin/
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"] 生产环境大部分这样写
[root@master img3]# ls
Dockerfile entrypoint.sh index.html
[root@master img3]# docker build -t myweb:v0.3-6 ./
[root@master img3]# docker run --name myweb1 --rm -P myweb:v0.3-6
进入容器
[root@master img3]# docker exec -it myweb1 /bin/sh
/ # ls /etc/nginx/conf.d/www.conf
/etc/nginx/conf.d/www.conf
/ # cat /etc/nginx/conf.d/www.conf
server {
server_name bb3995bf7afe;
listen 0.0.0.0:80;
root /data/web/html/;
}
/ # netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
-Y on/off Use proxy
/ # wget -O - -q bb3995bf7afe
<h1>New Doc Root For nginx</h1>
/ #
在看之前启动的窗口
127.0.0.1 - - [01/Jan/2019:07:02:16 +0000] "GET / HTTP/1.1" 200 612 "-" "Wget" "-"
172.17.0.6 - - [01/Jan/2019:07:02:40 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
换个端口
[root@master img3]# docker run --name myweb1 --rm -P -e "PORT=8080" myweb:v0.3-6
[root@master img3]# docker exec -it myweb1 /bin/sh
/ # netstat -tnp
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
/ # netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
/ # ps
PID USER TIME COMMAND
1 root 0:00 nginx: master process /usr/sbin/nginx -g daemon off; 这里nginx pid为1
10 nginx 0:00 nginx: worker process
11 root 0:00 /bin/sh
20 root 0:00 ps
------------------------------------------------------
实验19
[root@master img3]# cat Dockerfile
FROM nginx:1.14-alpine
LABEL maintainer="Wolf <1098331428@qq.com>"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD index.html ${NGX_DOC_ROOT}
ADD entrypoint.sh /bin/
EXPOSE 80/tcp
HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:${PORT:-80}/
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"]
[root@master img3]# docker build -t myweb:v0.3-7 ./
这里30秒自动检查一次
[root@master img3]# docker run --name myweb1 --rm -P -e "PORT=8080" myweb:v0.3-7
127.0.0.1 - - [01/Jan/2019:07:38:11 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
127.0.0.1 - - [01/Jan/2019:07:38:41 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
127.0.0.1 - - [01/Jan/2019:07:39:11 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
127.0.0.1 - - [01/Jan/2019:07:39:41 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
127.0.0.1 - - [01/Jan/2019:07:40:12 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
127.0.0.1 - - [01/Jan/2019:07:40:42 +0000] "GET / HTTP/1.1" 200 32 "-" "Wget" "-"
--------------------------------------------------
实验20
搞一个失败的
[root@master img3]# cat Dockerfile
FROM nginx:1.14-alpine
LABEL maintainer="Wolf <1098331428@qq.com>"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD index.html ${NGX_DOC_ROOT}
ADD entrypoint.sh /bin/
EXPOSE 80/tcp
HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/ 没这个端口
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"]
[root@master img3]# docker build -t myweb:v0.3-8 ./
[root@master img3]# docker exec -it myweb1 /bin/sh
/ # ls
bin data dev etc home lib media mnt proc root run sbin srv sys tmp usr var
/ # netstat -nlt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
[root@master img3]# docker run --name myweb1 --rm -P -e "PORT=8080" myweb:v0.3-8
这里暂时没什么信息出来
----------------------------------------------------
实验21
[root@master img3]# cat Dockerfile
FROM nginx:1.14-alpine
ARG author="Wolf <1098331428@qq.com>" 这里
LABEL maintainer="${author}"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD index.html ${NGX_DOC_ROOT}
ADD entrypoint.sh /bin/
EXPOSE 80/tcp
HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"]
[root@master img3]# docker build --build-arg author="laolang <1@qq.com>" -t myweb:v0.3-9 ./
[root@master img3]# docker image inspect myweb:v0.3-9
"Labels": {
"maintainer": "laolang <1@qq.com>"
----------------------------------------------------------------
实验22
[root@master ~]# cat img3/Dockerfile
FROM nginx:1.14-alpine
ARG author="Wolf <1098331428@qq.com>"
LABEL maintainer="${author}"
ENV NGX_DOC_ROOT="/data/web/html/"
ADD index.html ${NGX_DOC_ROOT}
ADD entrypoint.sh /bin/
EXPOSE 80/tcp
HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/
ONBUILD ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ 给别人引用是使用
CMD ["/usr/sbin/nginx","-g","daemon off;"]
ENTRYPOINT ["/bin/entrypoint.sh"]
[root@master img3]# docker build -t myweb:v0.3-11 ./
Sending build context to Docker daemon 4.096kB
Step 1/11 : FROM nginx:1.14-alpine
---> c5b6f731fbc0
Step 2/11 : ARG author="Wolf <1098331428@qq.com>"
---> Using cache
---> d4e4e6be6577
Step 3/11 : LABEL maintainer="${author}"
---> Using cache
---> 9f658efd06e5
Step 4/11 : ENV NGX_DOC_ROOT="/data/web/html/"
---> Using cache
---> 590098f3a4f3
Step 5/11 : ADD index.html ${NGX_DOC_ROOT}
---> Using cache
---> c09c452e01cb
Step 6/11 : ADD entrypoint.sh /bin/
---> Using cache
---> e513c46ff077
Step 7/11 : EXPOSE 80/tcp
---> Using cache
---> bb0253812192
Step 8/11 : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/
---> Using cache
---> 3248975f5350
Step 9/11 : ONBUILD ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ 这里并没有下载
---> Running in bfc314792cf0
Removing intermediate container bfc314792cf0
---> 69b8628b2175
Step 10/11 : CMD ["/usr/sbin/nginx","-g","daemon off;"]
---> Running in ec32763eb170
Removing intermediate container ec32763eb170
---> 6142392642ca
Step 11/11 : ENTRYPOINT ["/bin/entrypoint.sh"]
---> Running in 6dea0e97365c
Removing intermediate container 6dea0e97365c
---> ead4bb0f4a5b
Successfully built ead4bb0f4a5b
Successfully tagged myweb:v0.3-11
[root@master img3]#
[root@master img3]# docker build --build-arg author="laolang <1@qq.com>" -t myweb:v0.3-11 ./
Sending build context to Docker daemon 4.096kB
Step 1/11 : FROM nginx:1.14-alpine
---> c5b6f731fbc0
Step 2/11 : ARG author="Wolf <1098331428@qq.com>"
---> Using cache
---> d4e4e6be6577
Step 3/11 : LABEL maintainer="${author}"
---> Using cache
---> e8b3afaa33c2
Step 4/11 : ENV NGX_DOC_ROOT="/data/web/html/"
---> Using cache
---> 8add3272b2f8
Step 5/11 : ADD index.html ${NGX_DOC_ROOT}
---> Using cache
---> f85d1a062166
Step 6/11 : ADD entrypoint.sh /bin/
---> Using cache
---> 4853edd7ef12
Step 7/11 : EXPOSE 80/tcp
---> Using cache
---> 8867a4941223
Step 8/11 : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/
---> Using cache
---> 354cb57a95de
Step 9/11 : ONBUILD ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
---> Running in f91fae6fdadb
Removing intermediate container f91fae6fdadb
---> 11c5b5143652
Step 10/11 : CMD ["/usr/sbin/nginx","-g","daemon off;"]
---> Running in 07cf866d758a
Removing intermediate container 07cf866d758a
---> 3cd14d73d4bb
Step 11/11 : ENTRYPOINT ["/bin/entrypoint.sh"]
---> Running in c086fa2bf583
Removing intermediate container c086fa2bf583
---> 60d0970fc15c
Successfully built 60d0970fc15c
Successfully tagged myweb:v0.3-11
[root@master img3]# cd ..
[root@master ~]# mkdir img4
[root@master ~]# cat Dockerfile
FROM myweb:v0.3-11 这里引用我自己做的镜像
RUN mkdir /tmp/test
[root@master ~]# docker build -t test:v0.1-1 ./
Sending build context to Docker daemon 2.152MB
Step 1/2 : FROM myweb:v0.3-11
# Executing 1 build trigger
Downloading [==================================================>] 1.028MB/1.028MB 这里触发下载了
---> 8d244351d147
Step 2/2 : RUN mkdir /tmp/test
---> Running in bf6c090dd1b3
Removing intermediate container bf6c090dd1b3
---> ce7906fc7a75
Successfully built ce7906fc7a75
如果还不熟悉去官方仔细看，仔细读
https://github.com/docker-library
来源：CSDN
作者：yujin2010good
链接：https://blog.csdn.net/yujin2010good/article/details/85316140