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

# let "Tomcat Native" live somewhere isolated
ENV 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 http://tomcat.10.x6.nabble.com/VOTE-Release-Apache-Tomcat-8-0-32-tp5046007p5046024.html (and following discussion)
# and https://github.com/docker-library/tomcat/pull/31
ENV OPENSSL_VERSION 1.1.0f-3+deb9u2
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 http://deb.debian.org/debian stretch main'; \
				echo 'deb http://security.debian.org stretch/updates main'; \
				echo 'deb http://deb.debian.org/debian 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 https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/KEYS
# see also "update.sh" (https://github.com/docker-library/tomcat/blob/master/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
	https://www.apache.org/dyn/closer.cgi?action=download&filename=tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz \
# if the version is outdated, we might have to pull from the dist/archive :/
	https://www-us.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz \
	https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz \
	https://archive.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz

ENV TOMCAT_ASC_URLS \
	https://www.apache.org/dyn/closer.cgi?action=download&filename=tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc \
# not all the mirrors actually carry the .asc files :'(
	https://www-us.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc \
	https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc \
	https://archive.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.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 $savedAptMark; \
	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
	rm -rf /var/lib/apt/lists/*; \
	\
# sh removes env vars it doesn't support (ones with periods)
# https://github.com/docker-library/tomcat/issues/77
	find ./bin/ -name '*.sh' -exec sed -ri 's|^#!/bin/sh$|#!/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

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