Docker 安装 Tomcat

方法一、通过 Dockerfile构建

创建Dockerfile

首先，创建目录tomcat,用于存放后面的相关东西。

w3cschool@w3cschool:~$ mkdir -p ~/tomcat/webapps ~/tomcat/logs ~/tomcat/conf

webapps目录将映射为tomcat容器配置的应用程序目录

logs目录将映射为tomcat容器的日志目录

conf目录里的配置文件将映射为tomcat容器的配置文件

进入创建的tomcat目录，创建Dockerfile

FROM java:8-jre

ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
RUN mkdir -p "$CATALINA_HOME"
WORKDIR $CATALINA_HOME

# runtime dependencies for Tomcat Native Libraries
# Tomcat Native 1.2+ requires a newer version of OpenSSL than debian:jessie has available (1.0.2g+)
# see http://tomcat.10.x6.nabble.com/VOTE-Release-Apache-Tomcat-8-0-32-tp5046007p5046024.html (and following discussion)
ENV OPENSSL_VERSION 1.0.2h-1
RUN { 
                echo deb http://httpredir.debian.org/debian unstable main; 
        } > /etc/apt/sources.list.d/unstable.list 
        && { 
# add a negative "Pin-Priority" so that we never ever get packages from unstable unless we explicitly request them
                echo Package: *; 
                echo Pin: release a=unstable; 
                echo Pin-Priority: -10; 
                echo; 
# except OpenSSL, which is the reason were here
                echo Package: openssl libssl*; 
                echo "Pin: version $OPENSSL_VERSION"; 
                echo Pin-Priority: 990; 
        } > /etc/apt/preferences.d/unstable-openssl
RUN apt-get update && apt-get install -y --no-install-recommends 
                libapr1 
                openssl="$OPENSSL_VERSION" 
        && rm -rf /var/lib/apt/lists/*

# see https://www.apache.org/dist/tomcat/tomcat-8/KEYS
RUN set -ex 
        && for key in 
                05AB33110949707C93A279E3D3EFE6B686867BA6 
                07E48665A34DCAFAE522E5E6266191C37C037D42 
                47309207D818FFD8DCD3F83F1931D684307A10A5 
                541FBE7D8F78B25E055DDEE13C370389288584E7 
                61B832AC2F1C5A90F0F9B00A1C506407564C17A3 
                79F7026C690BAA50B92CD8B66A3AD3F4F22C4FED 
                9BA44C2621385CB966EBA586F72C284D731FABEE 
                A27677289986DB50844682F8ACB77FC2E86E29AC 
                A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 
                DCFD35E0BF8CA7344752DE8B6FB21E8933C60243 
                F3A04C595DB5B6A5F1ECA43E3B7BBB100D811BBE 
                F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23 
        ; do 
                gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; 
        done

ENV TOMCAT_MAJOR 8
ENV TOMCAT_VERSION 8.0.35
ENV TOMCAT_TGZ_URL https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz

RUN set -x 
        
        && curl -fSL "$TOMCAT_TGZ_URL" -o tomcat.tar.gz 
        && curl -fSL "$TOMCAT_TGZ_URL.asc" -o tomcat.tar.gz.asc 
        && gpg --batch --verify tomcat.tar.gz.asc tomcat.tar.gz 
        && tar -xvf tomcat.tar.gz --strip-components=1 
        && rm bin/*.bat 
        && rm tomcat.tar.gz* 
        
        && nativeBuildDir="$(mktemp -d)" 
        && tar -xvf bin/tomcat-native.tar.gz -C "$nativeBuildDir" --strip-components=1 
        && nativeBuildDeps=" 
                gcc 
                libapr1-dev 
                libssl-dev 
                make 
                openjdk-${JAVA_VERSION%%[-~bu]*}-jdk=$JAVA_DEBIAN_VERSION 
        " 
        && apt-get update && apt-get install -y --no-install-recommends $nativeBuildDeps && rm -rf /var/lib/apt/lists/* 
        && ( 
                export CATALINA_HOME="$PWD" 
                && cd "$nativeBuildDir/native" 
                && ./configure 
                        --libdir=/usr/lib/jni 
                        --prefix="$CATALINA_HOME" 
                        --with-apr=/usr/bin/apr-1-config 
                        --with-java-home="$(docker-java-home)" 
                        --with-ssl=yes 
                && make -j$(nproc) 
                && make install 
        ) 
        && apt-get purge -y --auto-remove $nativeBuildDeps 
        && rm -rf "$nativeBuildDir" 
        && rm bin/tomcat-native.tar.gz

# verify Tomcat Native is working properly
RUN set -e 
        && nativeLines="$(catalina.sh configtest 2>&1)" 
        && nativeLines="$(echo "$nativeLines" | grep Apache Tomcat Native)" 
        && nativeLines="$(echo "$nativeLines" | sort -u)" 
        && if ! echo "$nativeLines" | grep INFO: Loaded APR based Apache Tomcat Native library >&2; then 
                echo >&2 "$nativeLines"; 
                exit 1; 
        fi

EXPOSE 8080
CMD ["catalina.sh", "run"]

通过Dockerfile创建一个镜像，替换成你自己的名字

w3cschool@w3cschool:~/tomcat$ docker build -t tomcat .

创建完成后，我们可以在本地的镜像列表里查找到刚刚创建的镜像

w3cschool@w3cschool:~/tomcat$ docker images|grep tomcat
tomcat              latest              70f819d3d2d9        7 days ago          335.8 MB

方法二、docker pull tomcat

查找Docker Hub上的tomcat镜像

w3cschool@w3cschool:~/tomcat$ docker search tomcat
NAME                       DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
tomcat                     Apache Tomcat is an open source implementa...   744       [OK]       
dordoka/tomcat             Ubuntu 14.04, Oracle JDK 8 and Tomcat 8 ba...   19                   [OK]
consol/tomcat-7.0          Tomcat 7.0.57, 8080, "admin/admin"              16                   [OK]
consol/tomcat-8.0          Tomcat 8.0.15, 8080, "admin/admin"              14                   [OK]
cloudesire/tomcat          Tomcat server, 6/7/8                            8                    [OK]
davidcaste/alpine-tomcat   Apache Tomcat 7/8 using Oracle Java 7/8 wi...   6                    [OK]
andreptb/tomcat            Debian Jessie based image with Apache Tomc...   4                    [OK]
kieker/tomcat                                                              2                    [OK]
fbrx/tomcat                Minimal Tomcat image based on Alpine Linux      2                    [OK]
jtech/tomcat               Latest Tomcat production distribution on l...   1                    [OK]

这里我们拉取官方的镜像

w3cschool@w3cschool:~/tomcat$ docker pull tomcat

等待下载完成后，我们就可以在本地镜像列表里查到REPOSITORY为tomcat的镜像。

使用tomcat镜像

运行容器

w3cschool@w3cschool:~/tomcat$ docker run --name tomcat -p 8080:8080 -v $PWD/test:/usr/local/tomcat/webapps/test -d tomcat  
acb33fcb4beb8d7f1ebace6f50f5fc204b1dbe9d524881267aa715c61cf75320
w3cschool@w3cschool:~/tomcat$

命令说明：

-p 8080:8080：将容器的8080端口映射到主机的8080端口

-v $PWD/test:/usr/local/tomcat/webapps/test：将主机中当前目录下的test挂载到容器的/test

查看容器启动情况

w3cschool@w3cschool:~/tomcat$ docker ps 
CONTAINER ID    IMAGE     COMMAND               ... PORTS                    NAMES
acb33fcb4beb    tomcat    "catalina.sh run"     ... 0.0.0.0:8080->8080/tcp   tomcat

通过浏览器访问