Tomcat是由Apache软件基金会下属的Jakarta项目开发的一个Servlet容器，按照Sun Microsystems提供的技术规范，实现了对Servlet和JavaServer Page (JSP)的支持。同时，它提供了作为Web服务器的一些特有功能，如Tomcat管理和控制平台、安全域管理和Tomcat阀等。由于Tomcat本身也内含了一个HTTP服务器，也可以当作单独的Web服务器来使用。

第一种方式

1、准备工作

创建tomcat7.0_jdk1.6文件夹，并进入该文件夹

	mkdir tomcat7.0_jdk1.6	cd tomcat7.0_jdk1.6/

2、搜索Tomcat镜像

docker search tomcat

3、拉取官方的镜像

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。

4、查看tomcat镜像

[root@localhost tomcat7.0_jdk1.6]# docker images|grep tomcat

5、运行容器

[root@localhost tomcat7.0_jdk1.6]# docker run --name tomcat -p 8080:8080 -v $PWD/test:/usr/local/tomcat/webapps/test -d tomcat acb33fcb4beb8d7f1ebace6f50f5fc204b1dbe9d524881267aa715c61cf75320

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

6、查看容器启动情况

[root@localhost tomcat7.0_jdk1.6]# docker ps

7、浏览

方法二、通过 Dockerfile 构建

1、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 openjdk:8-jre ENV CATALINA_HOME /usr/local/tomcatENV PATH $CATALINA_HOME/bin:$PATHRUN mkdir -p "$CATALINA_HOME"WORKDIR $CATALINA_HOME# let "Tomcat Native" live somewhere isolatedENV TOMCAT_NATIVE_LIBDIR $CATALINA_HOME/native-jni-libENV LD_LIBRARY_PATH ${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$TOMCAT_NATIVE_LIBDIR# runtime dependencies for Tomcat Native Libraries# Tomcat Native 1.2+ requires a newer version of OpenSSL than debian:jessie has available# > checking OpenSSL library version >= 1.0.2...# > configure: error: Your version of OpenSSL is not compatible with this version of tcnative# see  (and following discussion)# and  OPENSSL_VERSION 1.1.0f-3+deb9u2RUN set -ex; \ currentVersion="$(dpkg-query --show --showformat '${Version}\n' openssl)"; \ if dpkg --compare-versions "$currentVersion" '<<' "$OPENSSL_VERSION"; then \ if ! grep -q stretch /etc/apt/sources.list; then \# only add stretch if we're not already building from within stretch { \ echo 'deb  stretch main'; \ echo 'deb  stretch/updates main'; \ echo 'deb  stretch-updates main'; \ } > /etc/apt/sources.list.d/stretch.list; \ { \# add a negative "Pin-Priority" so that we never ever get packages from stretch unless we explicitly request them echo 'Package: *'; \ echo 'Pin: release n=stretch*'; \ echo 'Pin-Priority: -10'; \ echo; \# ... except OpenSSL, which is the reason we're here echo 'Package: openssl libssl*'; \ echo "Pin: version $OPENSSL_VERSION"; \ echo 'Pin-Priority: 990'; \ } > /etc/apt/preferences.d/stretch-openssl; \ fi; \ apt-get update; \ apt-get install -y --no-install-recommends openssl="$OPENSSL_VERSION"; \ rm -rf /var/lib/apt/lists/*; \ fi RUN apt-get update && apt-get install -y --no-install-recommends \ libapr1 \ && rm -rf /var/lib/apt/lists/* # see  see also "update.sh" ()ENV GPG_KEYS 05AB33110949707C93A279E3D3EFE6B686867BA6 07E48665A34DCAFAE522E5E6266191C37C037D42 47309207D818FFD8DCD3F83F1931D684307A10A5 541FBE7D8F78B25E055DDEE13C370389288584E7 61B832AC2F1C5A90F0F9B00A1C506407564C17A3 713DA88BE50911535FE716F5208B0AB1D63011C7 79F7026C690BAA50B92CD8B66A3AD3F4F22C4FED 9BA44C2621385CB966EBA586F72C284D731FABEE A27677289986DB50844682F8ACB77FC2E86E29AC A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 DCFD35E0BF8CA7344752DE8B6FB21E8933C60243 F3A04C595DB5B6A5F1ECA43E3B7BBB100D811BBE F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23 ENV TOMCAT_MAJOR 8ENV TOMCAT_VERSION 8.5.32ENV TOMCAT_SHA512 fc010f4643cb9996cad3812594190564d0a30be717f659110211414faf8063c61fad1f18134154084ad3ddfbbbdb352fa6686a28fbb6402d3207d4e0a88fa9ce ENV TOMCAT_TGZ_URLS \#  ;filename=tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz \# if the version is outdated, we might have to pull from the dist/archive :/  \  \  ENV TOMCAT_ASC_URLS \ ;filename=tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc \# not all the mirrors actually carry the .asc files :'(  \  \  RUN set -eux; \ \ savedAptMark="$(apt-mark showmanual)"; \ apt-get update; \ \ apt-get install -y --no-install-recommends gnupg dirmngr; \ \ export GNUPGHOME="$(mktemp -d)"; \ for key in $GPG_KEYS; do \ gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \ done; \ \ apt-get install -y --no-install-recommends wget ca-certificates; \ \ success=; \ for url in $TOMCAT_TGZ_URLS; do \ if wget -O tomcat.tar.gz "$url"; then \ success=1; \ break; \ fi; \ done; \ [ -n "$success" ]; \ \ echo "$TOMCAT_SHA512 *tomcat.tar.gz" | sha512sum -c -; \ \ success=; \ for url in $TOMCAT_ASC_URLS; do \ if wget -O tomcat.tar.gz.asc "$url"; then \ success=1; \ break; \ fi; \ done; \ [ -n "$success" ]; \ \ gpg --batch --verify tomcat.tar.gz.asc tomcat.tar.gz; \ tar -xvf tomcat.tar.gz --strip-components=1; \ rm bin/*.bat; \ rm tomcat.tar.gz*; \ rm -rf "$GNUPGHOME"; \ \ nativeBuildDir="$(mktemp -d)"; \ tar -xvf bin/tomcat-native.tar.gz -C "$nativeBuildDir" --strip-components=1; \ apt-get install -y --no-install-recommends \ dpkg-dev \ gcc \ libapr1-dev \ libssl-dev \ make \ "openjdk-${JAVA_VERSION%%[.~bu-]*}-jdk=$JAVA_DEBIAN_VERSION" \ ; \ ( \ export CATALINA_HOME="$PWD"; \ cd "$nativeBuildDir/native"; \ gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \ ./configure \ --build="$gnuArch" \ --libdir="$TOMCAT_NATIVE_LIBDIR" \ --prefix="$CATALINA_HOME" \ --with-apr="$(which apr-1-config)" \ --with-java-home="$(docker-java-home)" \ --with-ssl=yes; \ make -j "$(nproc)"; \ make install; \ ); \ rm -rf "$nativeBuildDir"; \ rm bin/tomcat-native.tar.gz; \ \# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies apt-mark auto '.*' > /dev/null; \ [ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \ apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \ rm -rf /var/lib/apt/lists/*; \ \# sh removes env vars it doesn't support (ones with periods)#  find ./bin/ -name '*.sh' -exec sed -ri 's|^#!/bin/sh$|#!/usr/bin/env bash|' '{}' + # verify Tomcat Native is working properlyRUN 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 8080CMD ["catalina.sh", "run"]

2、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 .

3、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 tomcattomcat latest 70f819d3d2d9 7 days ago 335.8 MB

4、运行容器

runoob@runoob:~/tomcat$ docker run --name tomcat -p 8080:8080 -v $PWD/test:/usr/local/tomcat/webapps/test -d tomcat acb33fcb4beb8d7f1ebace6f50f5fc204b1dbe9d524881267aa715c61cf75320runoob@runoob:~/tomcat$

5、浏览