I met Dockerfile
Dockerfile profile
Dockerfile is used to build docker image file! Command script! First experience. Through this script can generate mirror, mirror is a layer of a layer, script is a command, each command is a layer! Write a dockerfile
Create a file named dockerFile
# Content directive (uppercase) arguments in the file
FROM centos
VOLUME ["volme01"."volume02"]
CMD echo "--------end----------"
CMD /bin/bash
Here each instruction is a mirror layer
Copy the codeUse dockerfile to generate the image
Docker build -f Dockerfile file location -t Image name and location where the version image is generatedCopy the code
- View details about the image
- View the volume synchronization directory
- docker ps -a
- Docker inspect Container ID
- Finally, test whether the two folders are synchronized
- Synchronous success
- conclusion
- The way to build images using Dockerfile is going to be a lot more common in our future use, because we will usually build our own images
- If no volume is mounted during mirror construction, manually mount the image -v
Dockerfile,
- Dockerfile profile
- Dockerfile is the file used to build dokcer images! Command parameter script!
- Build steps
- Write a dockerFile file
- Dockerbuild builds into an image
- Dockerrun runs the image
- Docker Push image release (DockerHub, Ali Cloud warehouse)
- See how official is built
- Click the red box to jump to the Github address
- A lot of official images are base packages, and a lot of features are missing, so we usually build our own images
- If the authorities can make mirrors, so can we
- Dockerfile writing specification
- Each reserved keyword (instruction) must be in uppercase
- Execute from top to bottom
- # comment
- Each instruction creates and commits a new mirror layer, and commits
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The far-reaching impact of Dockerfile
- Dockerfile is development oriented, we want to release the project, do the image, you need to write dockerfile file, this file is very simple!
- Docker image has gradually become the standard of enterprise delivery, must be mastered!
- Steps: Development, deployment, operation and maintenance… Both are indispensable!
- DockerFiIe build file, defined all the steps, source code (their own development)
- Dockerlmages through DockerFiIe build generated like, the final release and run the product! (use)
- Docker container the container is the server that the image runs on (use)
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Dockerfile instruction
In actual combat
Dockerfile command
FROM centos
MAINTAINER waws<16601203140@163.com>
ENV MYPATH /usr/local
WORKDIR @MYPATH
RUN yum -y install vim
RUN yum -y install net-tools
EXPOSE 80
CMD echo $MYPATH
CMD echo "-------end-------"
CMD /bin/bash
Copy the code- Effect of installation process
Sending build context to Docker daemon 2.048kB
Step 1/10 : FROM centos Install from centos
---> 0d120b6ccaa8
Step 2/10 : MAINTAINER waws<16601203140@163.com> # Author information
---> Running in dd1d454e365b
Removing intermediate container dd1d454e365b
---> 0eb159a21f67
Step 3/10 : ENV MYPATH /usr/local # Environment variables
---> Running in 4b61abda7759
Removing intermediate container 4b61abda7759
---> 2597f9cf4496
Step 4/10 : WORKDIR @MYPATH Set the working directory
---> Running in 527632c7d29f
Removing intermediate container 527632c7d29f
---> d6cd1780dfb5
Step 5/10 : RUN yum -y install vim # Download Vim and Net-Tools from the web
---> Running in 5867417fe57a
CentOS-8- AppStream 2.7 MB/s | 5.8MB 00: 02 CentOS -8- Base 2.0 MB/s | 2.2MB 00: 01 CentOS -8- Extras 7.4 kB/s | 8.1KB 00: 01 Dependencies resolved. = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Package Arch Version Repository Size ================================================================================ Installing: Vim - enhanced x86_64 2:8.01763.-13.El8 AppStream 1.4M Installing dependencies: GPM - libs x86_64 1.207.-15.El8 AppStream 39K vim - common x86_64 2:8.01763.-13.El8 AppStream 6.3M vim - filesystem noarch 2:8.01763.-13.El8 AppStream 48K which x86_64 2.21-12.El8 BaseOS 49K the Transaction Summary = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = the Install 5 Packages
Total download size: 7.8 M
Installed size: 31 M
Downloading Packages:
(1/5): gpm-libs-1.207.-15.El8. X86_64. RPM 37KB/s | 39KB 00: 01 (2/5): vim-filesystem-8.01763.-13.el8.noarch.rp 545KB/s | 48KB 00:00 (3/5): which-2.21-12.El8. X86_64. RPM 194KB/s | 49KB 00:00 (4/5): vim-enhanced-8.01763.-13.El8. X86_64. RPM 771 kB/s | 1.4MB 00: 01 (5/5): vim-common-8.01763.-13.El8. X86_64. RPM 1.3 MB/s | 6.3MB 00: 04 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Total 1.2 MB/s | 7.8MB 00: 06 warning: / var/cache/DNF/AppStream - 02 e86d1c976ab532 / packages/GPM - libs -1.207.-15.el8.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8483c65d: NOKEY
CentOS-8- AppStream 1.6 MB/s | 1.6KB 00:00 Importing GPG key0x8483C65D: Userid :"CentOS (CentOS Official Signing Key) <[email protected]>"
Fingerprint: 99DB 70FA E1D7 CE22 7FB6 4882 05B5 55B3 8483C65D From : /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial Key imported successfully Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : which -2.21-12.El8. X86_64 1/5 Installing : vim -- filesystem2:8.01763.-13.El8. Noarch 2/5 Installing : vim - common -2:8.01763.-13.El8. X86_64 3/5 Installing : GPM - libs -1.207.-15.El8. X86_64 4/5 Running scriptlets: GPM - libs -1.207.-15.El8. X86_64 4/5 Installing : vim - enhanced -2:8.01763.-13.El8. X86_64 5/5 Running scriptlets: vim - enhanced -2:8.01763.-13.El8. X86_64 5/5 Running scriptlets: vim - common -2:8.01763.-13.El8. X86_64 5/5 Verifying : GPM - libs -1.207.-15.El8. X86_64 1/5 Verifying : vim - common -2:8.01763.-13.El8. X86_64 2/5 Verifying : vim - enhanced -2:8.01763.-13.El8. X86_64 3/5 Verifying : vim -- filesystem2:8.01763.-13.El8. Noarch 4/5 Verifying : which -2.21-12.El8. X86_64 5/5Installed: GPM - libs -1.207.-15.El8. X86_64 vim - common -2:8.01763.-13.El8. X86_64 vim - enhanced -2:8.01763.-13.el8.x86_64 vim-filesystem-2:8.01763.-13.El8. Noarch which -2.21-12.El8. X86_64 Complete! Removing intermediate container 5867417fe57a ---> c72800950e21 Step6/10 : RUN yum -y install net-tools
---> Running in 09f5890b9264
Last metadata expiration check: 0:00:12A line on the Sat Oct 3 09:46: 062020.Dependencies resolved. = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Package Architecture Version Repository Size ================================================================================ Installing: Net - tools x86_64 2.0-0.5120160912.Git. El8 BaseOS 323K the Transaction Summary = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = the Install 1 Package
Total download size: 323 k
Installed size: 1.0 M
Downloading Packages:
net-tools-2.0-0.5120160912.Git. El8. X86_64. RPM 1.7 MB/s | 323KB 00:00 -------------------------------------------------------------------------------- Total 504 kB/s | 323KB 00:00 Running Transaction check Transaction check succeeded. Running Transaction test Transaction test succeeded. Running The transaction Preparing : 1/1 Installing : net - tools -2.0-0.5120160912.Git. El8. X86_64 1/1 Running scriptlets: net - tools -2.0-0.5120160912.Git. El8. X86_64 1/1 Verifying : net - tools -2.0-0.5120160912.Git. El8. X86_64 1/1Installed: net - tools -2.0-0.5120160912.Git. El8. X86_64 Complete! Removing intermediate container 09f5890b9264 ---> cd3a6c56f9e6 Step7/10 : EXPOSE 80 Expose port 80
---> Running in 5e71dc82b66d
Removing intermediate container 5e71dc82b66d
---> 7699d971e2de
Step 8/10 : CMD echo $MYPATH # execute command
---> Running in cd1156844880
Removing intermediate container cd1156844880
---> 5f62b3148180
Step 9/10 : CMD echo "-------end-------"
---> Running in 44fd371fabe7
Removing intermediate container 44fd371fabe7
---> fc4fcc5350bc
Step 10/10 : CMD /bin/bash
---> Running in 47d3d9910051
Removing intermediate container 47d3d9910051
---> b6b678359c7e
Successfully built b6b678359c7e # Build success signs
Successfully tagged mycentos:latest
Copy the code-
Results show
Difference between CMD and ENTRYPOINT
- CMD is the replacement command
FROM centos
CMD ["ls"."-a"] exit
Copy the code- The effect
- ENTRYPOINT is the append command
FROM centos
ENTRYPOINT ["ls"."-a"]
Copy the code- The effect
Actual combat tomcat
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First of all, prepare the files required by the image, tomcat installation package, JDK installation package (this place to download the line, pay attention to the corresponding numbers)
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-f is not required to specify a dockerfile, which is officially named and automatically found by build
FROM centos
MAINTAINER waws<16601203140@163.com>
COPY readme.txt /usr/local/readme.txt
ADD jdk-8u101-linux-x64.tar.gz /usr/local/
ADD apache-tomcat-9.027..tar.gz /usr/local/
RUN yum -y install vim
ENV MYPATH /usr/local
WORKDIR $MYPATH
ENV JAVA_HOME /usr/local/jdk18.. 0 _101
ENV CATALINA_HOME /usr/local/apache-tomcat-9.027.
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib
EXPOSE 8080
CMD /usr/local/apache-tomcat-9.027./bin/startup.sh && tail -F /usr/local/apache-tomcat-9.027./logs/catalina.out
Copy the code-
Build the mirror
- Docker build -t diytomcat: 1.0
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Boot image
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docker run -d -p 9090:8080 --name tomcat01 -v /home/test:/usr/local/apache-tomcat-9.027./webapps/test -v /home/tomcatlogs/:/usr/local/apache-tomcat-9.027./logs diytomcat:1.0 Copy the code
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Publish the project (because of volume mount, we can write the project locally and publish it)
Publish your own Docker image
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Published to dockerhub
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Dockerhub address: hub.docker.com/ register your account
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Make sure you can log in to this account
- Login success – is displayed
- Login success – is displayed
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Submit your own image on our server
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After login, you can submit the image, which is a Docker push
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root@iZbp12kyfwxfku3288sr59Z:/home# docker login --help Usage: docker login [OPTIONS] [SERVER] Log in to a Docker registry. If no server is specified, the default isDefined by the daemon. Options: -p, --password string password password --password-stdin Take the passwordfromStdin -u, --username string username usernameCopy the code
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Login successful
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root@iZbp12kyfwxfku3288sr59Z:/home# docker login -u waws520 login command Password: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded The Login succeedsCopy the code
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commit
- The premise of submission is that the tag of our image must start with our username, otherwise the submission will be rejected
- denied: requested access to the resource is denied
- 1 login to docker login
- 2 Check whether the tag contains a user name
- First we relabel it
- Docker Tag Image ID WAWS520 /my_image:1.0
- Docker push waws520 / my_image: 1.0
- Are uploading
- Uploaded successfully
- Commit by layer
- denied: requested access to the resource is denied
- The premise of submission is that the tag of our image must start with our username, otherwise the submission will be rejected
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Publish to Aliyun
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Log in to Aliyun
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Find the Mirror service
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Creating a namespace
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Create a warehouse
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Detailed steps
- Login successful
- Change the version number and upload
- Login successful
Compressed package
- Save
- Load
