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。

runoob@runoob:~$ 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 we\'re 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

runoob@runoob:~/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

runoob@runoob:~/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

runoob@runoob:~/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

runoob@runoob:~/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

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

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

runoob@runoob:~/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