dockerのtomcatでスタートページとかWebアプリケーションマネージャが404になる場合
結論
webapps.distをwebappsにリネーム
$ mv webapps webapps2 $ mv webapps.dist webapps
環境
- dockerイメージ
tomcat:9.0.70-jdk17-corretto-al2
詳細
1.コンテナを起動する
$ docker run -d -p 8080:8080 --name tomcat9 tomcat:9.0.70-jdk17-corretto-al2 Unable to find image 'tomcat:9.0.70-jdk17-corretto-al2' locally 9.0.70-jdk17-corretto-al2: Pulling from library/tomcat 5b4a36b5b78f: Already exists 583e089287ff: Already exists d30e8da53c91: Already exists bd78d75dc197: Already exists 07116e0d2eba: Already exists Digest: sha256:c94a52613fb41b81226468bf90226d1b8d9d8e4587daa3db50f49c4bc70c314c Status: Downloaded newer image for tomcat:9.0.70-jdk17-corretto-al2 68674e39a2244bc1ad5294e92277c7e756c430cbdaac8c54b43d6f1542250c46
2.コンテナの確認
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 68674e39a224 tomcat:9.0.70-jdk17-corretto-al2 "catalina.sh run" 7 seconds ago Up 6 seconds 0.0.0.0:8080->8080/tcp tomcat9
3.localhost:8080にアクセスすると404になる
原因は、いちいちRUNで中身消すなりするの面倒だよねという話でスタートページなどの配置が変更されているためな模様 github.com
実際にlsで中身を見てみると下記のような構成になっている。
$ docker exec -it tomcat9 /bin/bash $ pwd /usr/local/tomcat $ ls BUILDING.txt CONTRIBUTING.md LICENSE NOTICE README.md RELEASE-NOTES RUNNING.txt bin conf lib logs native-jni-lib temp webapps webapps.dist work
webapps.distがデフォルトのスタートページなどが入っている。
$ ls webapps.dist
ROOT docs examples host-manager manager
なので、webapps.distをリネームしてやると良い 4.リネームする
$ mv webapps webapps2 $ mv webapps.dist webapps
5.conf/tomcat-users.xmlのログイン情報を設定する ◯変更前
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<tomcat-users xmlns="http://tomcat.apache.org/xml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
version="1.0">
<!--
By default, no user is included in the "manager-gui" role required
to operate the "/manager/html" web application. If you wish to use this app,
you must define such a user - the username and password are arbitrary.
Built-in Tomcat manager roles:
- manager-gui - allows access to the HTML GUI and the status pages
- manager-script - allows access to the HTTP API and the status pages
- manager-jmx - allows access to the JMX proxy and the status pages
- manager-status - allows access to the status pages only
The users below are wrapped in a comment and are therefore ignored. If you
wish to configure one or more of these users for use with the manager web
application, do not forget to remove the <!.. ..> that surrounds them. You
will also need to set the passwords to something appropriate.
-->
<!--
<user username="admin" password="<must-be-changed>" roles="manager-gui"/>
<user username="robot" password="<must-be-changed>" roles="manager-script"/>
-->
<!--
The sample user and role entries below are intended for use with the
examples web application. They are wrapped in a comment and thus are ignored
when reading this file. If you wish to configure these users for use with the
examples web application, do not forget to remove the <!.. ..> that surrounds
them. You will also need to set the passwords to something appropriate.
-->
<!--
<role rolename="tomcat"/>
<role rolename="role1"/>
<user username="tomcat" password="<must-be-changed>" roles="tomcat"/>
<user username="both" password="<must-be-changed>" roles="tomcat,role1"/>
<user username="role1" password="<must-be-changed>" roles="role1"/>
-->
</tomcat-users>
◯変更後
<?xml version="1.0" encoding="UTF-8"?>
<tomcat-users xmlns="http://tomcat.apache.org/xml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
version="1.0">
<user username="admin" password="###適当に変更###" roles="manager-gui"/>
</tomcat-users>
6.webapps/manager/META-INF/context.xmlでアクセス制限の修正をする ◯変更前
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<Context antiResourceLocking="false" privileged="true" >
<CookieProcessor className="org.apache.tomcat.util.http.Rfc6265CookieProcessor"
sameSiteCookies="strict" />
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
<Manager sessionAttributeValueClassNameFilter="java\.lang\.(?:Boolean|Integer|Long|Number|String)|org\.apache\.catalina\.filters\.CsrfPreventionFilter\$LruCache(?:\$1)?|java\.util\.(?:Linked)?HashMap"/>
</Context>
◯変更後
<?xml version="1.0" encoding="UTF-8"?>
<Context antiResourceLocking="false" privileged="true" >
<CookieProcessor className="org.apache.tomcat.util.http.Rfc6265CookieProcessor"
sameSiteCookies="strict" />
<!--
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
-->
<Manager sessionAttributeValueClassNameFilter="java\.lang\.(?:Boolean|Integer|Long|Number|String)|org\.apache\.catalina\.filters\.CsrfPreventionFilter\$LruCache(?:\$1)?|java\.util\.(?:Linked)?HashMap"/>
</Context>
所感
やはりだいたい公式に答えは書いてある
