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nixpkgs/nixos/modules/services/web-servers/tomcat.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.tomcat;
tomcat = cfg.package;
in
{
###### interface
options = {
services.tomcat = {
enable = mkOption {
default = false;
description = "Whether to enable Apache Tomcat";
};
package = mkOption {
type = types.package;
default = pkgs.tomcat7;
example = lib.literalExample "pkgs.tomcat8";
description = ''
Which tomcat package to use.
'';
};
baseDir = mkOption {
default = "/var/tomcat";
description = "Location where Tomcat stores configuration files, webapplications and logfiles";
};
extraGroups = mkOption {
default = [];
example = [ "users" ];
description = "Defines extra groups to which the tomcat user belongs.";
};
user = mkOption {
default = "tomcat";
description = "User account under which Apache Tomcat runs.";
};
group = mkOption {
default = "tomcat";
description = "Group account under which Apache Tomcat runs.";
};
javaOpts = mkOption {
default = "";
description = "Parameters to pass to the Java Virtual Machine which spawns Apache Tomcat";
};
catalinaOpts = mkOption {
default = "";
description = "Parameters to pass to the Java Virtual Machine which spawns the Catalina servlet container";
};
sharedLibs = mkOption {
default = [];
description = "List containing JAR files or directories with JAR files which are libraries shared by the web applications";
};
commonLibs = mkOption {
default = [];
description = "List containing JAR files or directories with JAR files which are libraries shared by the web applications and the servlet container";
};
webapps = mkOption {
default = [ tomcat ];
description = "List containing WAR files or directories with WAR files which are web applications to be deployed on Tomcat";
};
virtualHosts = mkOption {
default = [];
description = "List consisting of a virtual host name and a list of web applications to deploy on each virtual host";
};
logPerVirtualHost = mkOption {
default = false;
description = "Whether to enable logging per virtual host.";
};
jdk = mkOption {
default = pkgs.jdk;
description = "Which JDK to use.";
};
axis2 = {
enable = mkOption {
default = false;
description = "Whether to enable an Apache Axis2 container";
};
services = mkOption {
default = [];
description = "List containing AAR files or directories with AAR files which are web services to be deployed on Axis2";
};
};
};
};
###### implementation
config = mkIf config.services.tomcat.enable {
users.extraGroups = singleton
{ name = "tomcat";
gid = config.ids.gids.tomcat;
};
users.extraUsers = singleton
{ name = "tomcat";
uid = config.ids.uids.tomcat;
description = "Tomcat user";
home = "/homeless-shelter";
extraGroups = cfg.extraGroups;
};
jobs.tomcat =
{ description = "Apache Tomcat server";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
daemonType = "daemon";
preStart =
''
# Create the base directory
mkdir -p ${cfg.baseDir}
# Create a symlink to the bin directory of the tomcat component
ln -sfn ${tomcat}/bin ${cfg.baseDir}/bin
# Create a conf/ directory
mkdir -p ${cfg.baseDir}/conf
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/conf
# Symlink the config files in the conf/ directory (except for catalina.properties and server.xml)
for i in $(ls ${tomcat}/conf | grep -v catalina.properties | grep -v server.xml)
do
ln -sfn ${tomcat}/conf/$i ${cfg.baseDir}/conf/`basename $i`
done
# Create subdirectory for virtual hosts
mkdir -p ${cfg.baseDir}/virtualhosts
# Create a modified catalina.properties file
# Change all references from CATALINA_HOME to CATALINA_BASE and add support for shared libraries
sed -e 's|''${catalina.home}|''${catalina.base}|g' \
-e 's|shared.loader=|shared.loader=''${catalina.base}/shared/lib/*.jar|' \
${tomcat}/conf/catalina.properties > ${cfg.baseDir}/conf/catalina.properties
# Create a modified server.xml which also includes all virtual hosts
sed -e "/<Engine name=\"Catalina\" defaultHost=\"localhost\">/a\ ${
toString (map (virtualHost: ''<Host name=\"${virtualHost.name}\" appBase=\"virtualhosts/${virtualHost.name}/webapps\" unpackWARs=\"true\" autoDeploy=\"true\" xmlValidation=\"false\" xmlNamespaceAware=\"false\" >${if cfg.logPerVirtualHost then ''<Valve className=\"org.apache.catalina.valves.AccessLogValve\" directory=\"logs/${virtualHost.name}\" prefix=\"${virtualHost.name}_access_log.\" pattern=\"combined\" resolveHosts=\"false\"/>'' else ""}</Host>'') cfg.virtualHosts)}" \
${tomcat}/conf/server.xml > ${cfg.baseDir}/conf/server.xml
# Create a logs/ directory
mkdir -p ${cfg.baseDir}/logs
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/logs
${if cfg.logPerVirtualHost then
toString (map (h: ''
mkdir -p ${cfg.baseDir}/logs/${h.name}
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/logs/${h.name}
'') cfg.virtualHosts) else ''''}
# Create a temp/ directory
mkdir -p ${cfg.baseDir}/temp
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/temp
# Create a lib/ directory
mkdir -p ${cfg.baseDir}/lib
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/lib
# Create a shared/lib directory
mkdir -p ${cfg.baseDir}/shared/lib
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/shared/lib
# Create a webapps/ directory
mkdir -p ${cfg.baseDir}/webapps
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/webapps
# Symlink all the given common libs files or paths into the lib/ directory
for i in ${tomcat} ${toString cfg.commonLibs}
do
if [ -f $i ]
then
# If the given web application is a file, symlink it into the common/lib/ directory
ln -sfn $i ${cfg.baseDir}/lib/`basename $i`
elif [ -d $i ]
then
# If the given web application is a directory, then iterate over the files
# in the special purpose directories and symlink them into the tomcat tree
for j in $i/lib/*
do
ln -sfn $j ${cfg.baseDir}/lib/`basename $j`
done
fi
done
# Symlink all the given shared libs files or paths into the shared/lib/ directory
for i in ${toString cfg.sharedLibs}
do
if [ -f $i ]
then
# If the given web application is a file, symlink it into the common/lib/ directory
ln -sfn $i ${cfg.baseDir}/shared/lib/`basename $i`
elif [ -d $i ]
then
# If the given web application is a directory, then iterate over the files
# in the special purpose directories and symlink them into the tomcat tree
for j in $i/shared/lib/*
do
ln -sfn $j ${cfg.baseDir}/shared/lib/`basename $j`
done
fi
done
# Symlink all the given web applications files or paths into the webapps/ directory
for i in ${toString cfg.webapps}
do
if [ -f $i ]
then
# If the given web application is a file, symlink it into the webapps/ directory
ln -sfn $i ${cfg.baseDir}/webapps/`basename $i`
elif [ -d $i ]
then
# If the given web application is a directory, then iterate over the files
# in the special purpose directories and symlink them into the tomcat tree
for j in $i/webapps/*
do
ln -sfn $j ${cfg.baseDir}/webapps/`basename $j`
done
# Also symlink the configuration files if they are included
if [ -d $i/conf/Catalina ]
then
for j in $i/conf/Catalina/*
do
mkdir -p ${cfg.baseDir}/conf/Catalina/localhost
ln -sfn $j ${cfg.baseDir}/conf/Catalina/localhost/`basename $j`
done
fi
fi
done
${toString (map (virtualHost: ''
# Create webapps directory for the virtual host
mkdir -p ${cfg.baseDir}/virtualhosts/${virtualHost.name}/webapps
# Modify ownership
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/virtualhosts/${virtualHost.name}/webapps
# Symlink all the given web applications files or paths into the webapps/ directory
# of this virtual host
for i in "${if virtualHost ? webapps then toString virtualHost.webapps else ""}"
do
if [ -f $i ]
then
# If the given web application is a file, symlink it into the webapps/ directory
ln -sfn $i ${cfg.baseDir}/virtualhosts/${virtualHost.name}/webapps/`basename $i`
elif [ -d $i ]
then
# If the given web application is a directory, then iterate over the files
# in the special purpose directories and symlink them into the tomcat tree
for j in $i/webapps/*
do
ln -sfn $j ${cfg.baseDir}/virtualhosts/${virtualHost.name}/webapps/`basename $j`
done
# Also symlink the configuration files if they are included
if [ -d $i/conf/Catalina ]
then
for j in $i/conf/Catalina/*
do
mkdir -p ${cfg.baseDir}/conf/Catalina/${virtualHost.name}
ln -sfn $j ${cfg.baseDir}/conf/Catalina/${virtualHost.name}/`basename $j`
done
fi
fi
done
''
) cfg.virtualHosts) }
# Create a work/ directory
mkdir -p ${cfg.baseDir}/work
chown ${cfg.user}:${cfg.group} ${cfg.baseDir}/work
${if cfg.axis2.enable then
''
# Copy the Axis2 web application
cp -av ${pkgs.axis2}/webapps/axis2 ${cfg.baseDir}/webapps
# Turn off addressing, which causes many errors
sed -i -e 's%<module ref="addressing"/>%<!-- <module ref="addressing"/> -->%' ${cfg.baseDir}/webapps/axis2/WEB-INF/conf/axis2.xml
# Modify permissions on the Axis2 application
chown -R ${cfg.user}:${cfg.group} ${cfg.baseDir}/webapps/axis2
# Symlink all the given web service files or paths into the webapps/axis2/WEB-INF/services directory
for i in ${toString cfg.axis2.services}
do
if [ -f $i ]
then
# If the given web service is a file, symlink it into the webapps/axis2/WEB-INF/services
ln -sfn $i ${cfg.baseDir}/webapps/axis2/WEB-INF/services/`basename $i`
elif [ -d $i ]
then
# If the given web application is a directory, then iterate over the files
# in the special purpose directories and symlink them into the tomcat tree
for j in $i/webapps/axis2/WEB-INF/services/*
do
ln -sfn $j ${cfg.baseDir}/webapps/axis2/WEB-INF/services/`basename $j`
done
# Also symlink the configuration files if they are included
if [ -d $i/conf/Catalina ]
then
for j in $i/conf/Catalina/*
do
ln -sfn $j ${cfg.baseDir}/conf/Catalina/localhost/`basename $j`
done
fi
fi
done
''
else ""}
'';
script = ''
${pkgs.su}/bin/su -s ${pkgs.bash}/bin/sh ${cfg.user} -c 'CATALINA_BASE=${cfg.baseDir} JAVA_HOME=${cfg.jdk} JAVA_OPTS="${cfg.javaOpts}" CATALINA_OPTS="${cfg.catalinaOpts}" ${tomcat}/bin/startup.sh'
'';
postStop =
''
echo "Stopping tomcat..."
CATALINA_BASE=${cfg.baseDir} JAVA_HOME=${cfg.jdk} ${pkgs.su}/bin/su -s ${pkgs.bash}/bin/sh ${cfg.user} -c ${tomcat}/bin/shutdown.sh
'';
};
};
}