Echo edit, welcome to reprint, reprint please declare article source.Welcome to add echo WeChat (Micro Signal: t2421499075) to exchange learning.Never lose a hundred battles, never claim to be a constant winner, never fail, and always strive to move forward.- That's really powerful!!!

Key dockerfile s generated by image

Dockerfile is a configuration file in text format that allows users to quickly create custom images using Dockerfile.Generally speaking, Dockerfile is divided into four parts: basic mirror information, maintainer information, mirror operation instructions, and execution instructions at container startup.We can log in to github to find the docker's official repository: https://github.com/docker-library/mysql/blob/master/5.7/Dockerfile Find the dockerfile corresponding to mysql to analyze.(The notes are all for easy interpretation and are not available on the original address of the website)

# FROM specifies the base image, such as FROM ubuntu:14.04
FROM debian:stretch-slim

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r mysql && useradd -r -g mysql mysql

# RUN s execute commands inside the mirror, such as installing software, configuring the environment, etc. Line breaks can use ""
RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/*

# add gosu for easy step-down from root

# ENV: Set the value of the variable, ENV MYSQL_MAJOR 5.7, which can be modified through docker run --e key=value, followed by ${MYSQL_MAJOR}
ENV GOSU_VERSION 1.7
RUN set -x \
	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
	&& export GNUPGHOME="$(mktemp -d)" \
	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
	&& gpgconf --kill all \
	&& rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc \
	&& chmod +x /usr/local/bin/gosu \
	&& gosu nobody true \
	&& apt-get purge -y --auto-remove ca-certificates wget

RUN mkdir /docker-entrypoint-initdb.d

RUN apt-get update && apt-get install -y --no-install-recommends \
# for MYSQL_RANDOM_ROOT_PASSWORD
		pwgen \
# for mysql_ssl_rsa_setup
		openssl \
# FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
# File::Basename
# File::Copy
# Sys::Hostname
# Data::Dumper
		perl \
	&& rm -rf /var/lib/apt/lists/*

RUN set -ex; \
# gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
	key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; \
	export GNUPGHOME="$(mktemp -d)"; \
	gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	gpg --batch --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; \
	gpgconf --kill all; \
	rm -rf "$GNUPGHOME"; \
	apt-key list > /dev/null

ENV MYSQL_MAJOR 5.7
ENV MYSQL_VERSION 5.7.28-1debian9

RUN echo "deb http://repo.mysql.com/apt/debian/ stretch mysql-${MYSQL_MAJOR}" > /etc/apt/sources.list.d/mysql.list

# the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
# also, we set debconf keys to make APT a little quieter
RUN { \
		echo mysql-community-server mysql-community-server/data-dir select ''; \
		echo mysql-community-server mysql-community-server/root-pass password ''; \
		echo mysql-community-server mysql-community-server/re-root-pass password ''; \
		echo mysql-community-server mysql-community-server/remove-test-db select false; \
	} | debconf-set-selections \
	&& apt-get update && apt-get install -y mysql-server="${MYSQL_VERSION}" && rm -rf /var/lib/apt/lists/* \
	&& rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql /var/run/mysqld \
	&& chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \
# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
	&& chmod 777 /var/run/mysqld \
# comment out a few problematic configuration values
	&& find /etc/mysql/ -name '*.cnf' -print0 \
		| xargs -0 grep -lZE '^(bind-address|log)' \
		| xargs -rt -0 sed -Ei 's/^(bind-address|log)/#&/' \
# don't reverse lookup hostnames, they are usually another container
	&& echo '[mysqld]\nskip-host-cache\nskip-name-resolve' > /etc/mysql/conf.d/docker.cnf

# VOLUME: The specified data is suspended in the directory
VOLUME /var/lib/mysql

# COPY: Copy the host's files into a mirror. If the directory does not exist, it will automatically create the required directory. Note that only copying, not extracting and decompressing
COPY docker-entrypoint.sh /usr/local/bin/
RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
ENTRYPOINT ["docker-entrypoint.sh"]

# EXPOSE: Specifies the port to be exposed by the mirror, which can be mapped to the host using -p when the mirror is started
EXPOSE 3306 33060
CMD ["mysqld"]

Basic Instruction Cleanup

Dockerfile Actual Warfare Spring Boot Project

Here is an item with a link: https://git.coding.net/xlsorry/docker-demo.git

After downloading, validation can be started in the idea and access has a return value:

After completing these basic validations, we packaged the project into a jar

mvn clean package

• Once we've done that, we'll pass the jar package into the linux where docker is already installed.
• Create a new directory "first-dockerfile" in the docker installed environment
• Go to the first-dockerfile and put our typed jar packages in that directory
• Create a Dockerfile and write the following

FROM openjdk:8
MAINTAINER 2421499075@qq.com
LABEL name="dockerfile-demo" version="1.0" author="2421499075@qq.com"
COPY springboot-0.0.1-SNAPSHOT.jar dockerfile-image.jar
CMD ["java","-jar","dockerfile-image.jar"]

Once completed, the following figure is shown:

• Execute in this directory: docker build-t test-docker-image.

• After that, we can execute docker images to see if the package is successful.

We can see that there is an additional test-docker-image in the images, which we used when we executed the command.This image was packaged by creating a dockerfile.

• Create a container based on an image and run the docker we just packaged

docker run -d --name springboot01 -p 10080:8080 test-docker-image

• After successful startup, we can check in the browser to see if it runs successfully.The following interface proves our success.

Be a bottom-line Blogger