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speedup tomcat startup
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‎Dockerfile‎

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@@ -91,6 +91,8 @@ COPY --from=overlay /tmp/cas-overlay/build/cas-resources/templates/ /data/templa
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#templates
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COPY --from=overlay /tmp/cas-overlay/build/cas-resources/templates/ /usr/local/tomcat/webapps/cas/WEB-INF/classes/templates/custom
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COPY rootfs /
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#catalina.properties skiplist
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RUN /usr/bin/scan.sh /usr/local/tomcat >>/usr/local/tomcat/conf/catalina.properties
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EXPOSE 80
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EXPOSE 443

‎rootfs/usr/bin/scan.sh‎

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#! /usr/bin/env bash
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# Script to create catalina tld scanning exclusion string
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# see http://skybert.net/java/improve-tomcat-startup-time/
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# by torstein.k.johansen@gmail.com
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set -o errexit
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set -o nounset
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set -o pipefail
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read_user_input() {
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tomcat_home=$1
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}
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main() {
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read_user_input "$@"
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local jar_without_tld_list=
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for f in $(find ${tomcat_home} -name "*.jar"); do
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if [[ $(unzip -v ${f} | grep '.tld$' | wc -l) -eq 0 ]]; then
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jar_without_tld_list="${jar_without_tld_list}$(basename $f)\n"
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fi
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done
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local result=
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for el in $(echo -e "$jar_without_tld_list" | sort | uniq); do
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if [ -n "${result}" ]; then
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result="${result},\\ \n${el}"
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else
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result="org.apache.catalina.startup.TldConfig.jarsToSkip=\\ \n${el}"
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fi
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done
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echo -e "${result}"
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}
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main "$@"

‎rootfs/usr/local/tomcat/conf/catalina.properties‎

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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# List of comma-separated packages that start with or equal this string
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# will cause a security exception to be thrown when
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# passed to checkPackageAccess unless the
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# corresponding RuntimePermission ("accessClassInPackage."+package) has
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# been granted.
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package.access=sun.,org.apache.catalina.,org.apache.coyote.,org.apache.jasper.,org.apache.tomcat.
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#
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# List of comma-separated packages that start with or equal this string
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# will cause a security exception to be thrown when
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# passed to checkPackageDefinition unless the
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# corresponding RuntimePermission ("defineClassInPackage."+package) has
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# been granted.
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#
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# by default, no packages are restricted for definition, and none of
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# the class loaders supplied with the JDK call checkPackageDefinition.
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#
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package.definition=sun.,java.,org.apache.catalina.,org.apache.coyote.,\
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org.apache.jasper.,org.apache.naming.,org.apache.tomcat.
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#
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#
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# List of comma-separated paths defining the contents of the "common"
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# classloader. Prefixes should be used to define what is the repository type.
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# Path may be relative to the CATALINA_HOME or CATALINA_BASE path or absolute.
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# If left as blank,the JVM system loader will be used as Catalina's "common"
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# loader.
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# Examples:
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# "foo": Add this folder as a class repository
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# "foo/*.jar": Add all the JARs of the specified folder as class
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# repositories
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# "foo/bar.jar": Add bar.jar as a class repository
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#
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# Note: Values are enclosed in double quotes ("...") in case either the
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# ${catalina.base} path or the ${catalina.home} path contains a comma.
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# Because double quotes are used for quoting, the double quote character
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# may not appear in a path.
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common.loader="${catalina.base}/lib","${catalina.base}/lib/*.jar","${catalina.home}/lib","${catalina.home}/lib/*.jar"
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#
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# List of comma-separated paths defining the contents of the "server"
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# classloader. Prefixes should be used to define what is the repository type.
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# Path may be relative to the CATALINA_HOME or CATALINA_BASE path or absolute.
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# If left as blank, the "common" loader will be used as Catalina's "server"
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# loader.
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# Examples:
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# "foo": Add this folder as a class repository
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# "foo/*.jar": Add all the JARs of the specified folder as class
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# repositories
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# "foo/bar.jar": Add bar.jar as a class repository
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#
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# Note: Values may be enclosed in double quotes ("...") in case either the
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# ${catalina.base} path or the ${catalina.home} path contains a comma.
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# Because double quotes are used for quoting, the double quote character
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# may not appear in a path.
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server.loader=
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#
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# List of comma-separated paths defining the contents of the "shared"
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# classloader. Prefixes should be used to define what is the repository type.
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# Path may be relative to the CATALINA_BASE path or absolute. If left as blank,
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# the "common" loader will be used as Catalina's "shared" loader.
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# Examples:
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# "foo": Add this folder as a class repository
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# "foo/*.jar": Add all the JARs of the specified folder as class
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# repositories
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# "foo/bar.jar": Add bar.jar as a class repository
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# Please note that for single jars, e.g. bar.jar, you need the URL form
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# starting with file:.
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#
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# Note: Values may be enclosed in double quotes ("...") in case either the
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# ${catalina.base} path or the ${catalina.home} path contains a comma.
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# Because double quotes are used for quoting, the double quote character
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# may not appear in a path.
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shared.loader=
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# Default list of JAR files that should be scanned that overrides the default
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# jarsToSkip list above. This is typically used to include a specific JAR that
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# has been excluded by a broad file name pattern in the jarsToSkip list.
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# The list of JARs to scan may be over-ridden at a Context level for individual
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# scan types by configuring a JarScanner with a nested JarScanFilter.
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tomcat.util.scan.StandardJarScanFilter.jarsToScan=\
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log4j-taglib*.jar,\
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log4j-web*.jar,\
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log4javascript*.jar,\
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slf4j-taglib*.jar
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# String cache configuration.
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tomcat.util.buf.StringCache.byte.enabled=true
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#tomcat.util.buf.StringCache.char.enabled=true
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#tomcat.util.buf.StringCache.trainThreshold=500000
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#tomcat.util.buf.StringCache.cacheSize=5000
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# Disable use of some privilege blocks Tomcat doesn't need since calls to the
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# code in question are always already inside a privilege block
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org.apache.el.GET_CLASSLOADER_USE_PRIVILEGED=false
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# skip list generated

‎rootfs/usr/local/tomcat/conf/server.xml‎

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certificateChainFile="/etc/cert/chain.pem" />
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</SSLHostConfig>
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</Connector>
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<Engine name="Catalina" defaultHost="localhost">
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<Engine name="Catalina" defaultHost="localhost" startStopThreads="0">
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<Realm className="org.apache.catalina.realm.LockOutRealm">
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<!-- This Realm uses the UserDatabase configured in the global JNDI
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resources under the key "UserDatabase". Any edits
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</Realm>
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<Host name="localhost" appBase="webapps"
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unpackWARs="true" autoDeploy="true">
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unpackWARs="false" autoDeploy="true" startStopThreads="0">
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<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
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prefix="localhost_access_log" suffix=".txt"
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pattern="%h %l %u %t &quot;%r&quot; %s %b" />

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