Docker 教程 之 Docker 安装 Tomcat 2

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：

baidu@baidu:~/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：

baidu@baidu:~/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。

baidu@baidu:~/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。

baidu@baidu:~$ 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

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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