Docker 安装 Tomcat
方法一、docker pull tomcat
查找 Docker Hub上的 Tomcat 镜像:
可以通过 Sort by 查看其他版本的 tomcat，默认是最新版本 tomcat:latest。
此外，我们还可以在控制台使用 docker search tomcat 命令来查看可用版本：
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。
runoob@runoob:~/tomcat$ docker images|grep tomcat
tomcat latest 70f819d3d2d9 7 days ago 335.8 MB方法二、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/confwebapps 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/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
RUN mkdir -p "$CATALINA_HOME"WORKDIR $CATALINA_HOME# let "Tomcat Native" live somewhere isolatedENV TOMCAT_NATIVE_LIBDIR $CATALINA_HOME/native-jni-lib
ENV LD_LIBRARY_PATH ${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$TOMCAT_NATIVE_LIBDIR# runtime dependencies for Tomcat Native Libraries# Tomcat Native 1.2+ requires a newer version of OpenSSL than debian:jessie has available# > checking OpenSSL library version >= 1.0.2...# > configure: error: Your version of OpenSSL is not compatible with this version of tcnative# see (and following discussion)# and
RUN set -ex; \
currentVersion="$(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 \
echo 'deb http://security.debian.org stretch/updates main'; \
echo 'deb \
} > /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 8
ENV TOMCAT_VERSION 8.5.32
ENV TOMCAT_SHA512 fc010f4643cb9996cad3812594190564d0a30be717f659110211414faf8063c61fad1f18134154084ad3ddfbbbdb352fa6686a28fbb6402d3207d4e0a88fa9ce
ENV TOMCAT_TGZ_URLS \
# https://issues.apache.org/jira/browse/INFRA-8753?focusedCommentId=14735394#comment-14735394
\
# if the version is outdated, we might have to pull from the dist/archive :/
\
\
ENV TOMCAT_ASC_URLS \
\
# not all the mirrors actually carry the .asc files :'(
\
\
.asc
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 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：将主机的 8080 端口映射到容器的 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
