System Architecture

Rundeck is a server application you host on a system you designate a central administrative control point. Internally, Rundeck stores job definitions and execution history in a relational database. Output from command and job executions is saved on disk but can be forwarded to remote stores like S3 or Logstash.

Rundeck distributed command execution is performed using a pluggable node execution layer that defaults to SSH but plugins allow you to use other means like MCollective, Salt, WinRM, or your custom method. Rundeck server configuration includes settings to define the outbound user allowed by the remote hosts. Remote machines are not required to make connections back to the server.

Rundeck architecture

Rundeck architecture

The Rundeck application itself is a Java-based webapp. The application provides both graphical interface and network interfaces used by the Rundeck shell tools.

Access to the Rundeck application requires a login and password. The default Rundeck installation uses a flat file user directory containing a set of default logins. Logins are defined in terms of a username and password as well as one or more user groups. An alternative configuration to the flat file user directory, is LDAP (e.g., ActiveDirectory) but Rundeck authentication and authorization is customizable via JAAS. Users must also be authorized to perform actions like define a job or execute one. This is controlled by an access control facility that reads policy files defined by the Rundeck administrator. Privilege is granted if a user's group membership meets the requirements of the policy.

Two installation methods are supported:

  • System package: RPM and Debian packaging is intended for managed installation and provides robust tools that integrate with your environment, man pages, shell tool set in your path, init.d startup and shutdown.

  • Launcher: The launcher is intended for quick setup, to get you running right away. Perfect for bootstrapping a project or trying a new feature.

Rundeck can also install as a WAR file into an external container like Tomcat.

Assuming the system requirements are met, Rundeck can be installed either from source, system package or via the launcher.

System Requirements

The following operating systems are known to support Rundeck:

  • Linux: Most recent distributions are likely to work
  • Windows: XP, Server and above
  • Mac OS X 10.4 or later

Root (or Administrator on Windows) is not required or recommended. We recommend using a dedicated user account such as "rundeck".

If there is need for root access, please set up the Rundeck user to have access via sudo.

Java

Rundeck is a Java-Servlet based server and therefore requires the Java runtime.

The install process requires that the latest version of Java 1.7 be installed. Both the Open JDK and Sun/Oracle JVMs can be used. You must have the JAVA_HOME environment variable defined in your environment before running the launcher. The RPM will use the java found on your path. See Setting JAVA_HOME if you want to run a different version of java.

Verify your Java version to check it meets the requirement:

$ java -version
java version "1.7.0_55"
OpenJDK Runtime Environment (rhel-2.4.7.1.el6_5-x86_64 u55-b13)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)

Network access

When the server starts, it binds to several TCP ports by default:

  • 4440 (http)
  • 4443 (https)

To check if the ports are free on a Unix host, run:

$ netstat -an | egrep '4440|4443' 

If the ports are in use on the server, you will see output similar to below:

tcp46      0      0  *.4440                 *.*                    LISTEN

The installation procedures describe how to choose different ports, if there is a conflict.

In addition, TCP port 22 (by default) needs to be open on the clients for SSH.

Clients should be set up to allow the Rundeck server user to connect to the clients using SSH via public-key authentication. It should not prompt for a password. See Configure remote machine for SSH in the Administration chapter.

There are various ways for installing SSH on Windows; we recommend Cygwin.

Installing from Source

Checkout the sources from GitHub

You can build either the launcher jar (self-running archive), or a RPM.

./gradlew build

Creates artifacts:

  • rundeckapp/target/rundeck-X.Y.war
  • rundeck-launcher/launcher/build/libs/rundeck-launcher-X.Y.jar

Build the RPM:

make rpm

To build clean:

make clean

Documentation can be built using: make clean docs. Documentation build requires pandoc. The RPM build depends on the the documentation as well.

Installing with RPM

Note, the java JRE must be installed. Install any JRE that is 1.7+.

If you want to install Rundeck on Linux via a binary installer, you can generally do so through the RPM tool that comes with your distribution.

# rpm -i rundeck-2.1.0.noarch.rpm

To install it using yum, first install the yum repo package and then run yum install:

# rpm -Uvh http://rundeck.org/latest.rpm
# yum install rundeck

Installing with Launcher

Use the launcher as an alternative to a system package:

  1. Download the launcher jar file.
  2. Define RDECK_BASE environment variable to the location of the install

    export RDECK_BASE=$HOME/rundeck; # or where you like it
  3. Create the directory for the installation.

    mkdir -p $RDECK_BASE 
  4. Copy the launcher jar to the installation directory.

    cp rundeck-launcher-2.0.0.jar $RDECK_BASE
  5. Change directory and run the jar.

    cd $RDECK_BASE    
    java -jar rundeck-launcher-2.0.0.jar
  6. Wait for the Started message.

    2010-11-19 13:35:51.127::INFO:  Started SocketConnector@0.0.0.0:4440
    
  7. Update your shell environment

    PATH=$PATH:$RDECK_BASE/tools/bin
    MANPATH=$MANPATH:$RDECK_BASE/docs/man

If you get an error message that resembles the one below, you probably are using an unsupported Java version.

Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file

See the startup and shutdown section for instructions on using the rundeckd shell tool to manage the rundeck launcher process.

Launcher Options

The launcher jar can take a number of options to specify how the server should start. If you execute with a "-h" you will see the usage information:

java -jar rundeck-launcher-2.1.0.jar -h
usage: java [JAVA_OPTIONS] -jar rundeck-launcher.jar  [-c PATH] [-d]
       [--installonly] [-s PATH] [-b PATH] [-p PATH] [-h] [-x PATH]
       [--skipinstall] [--serverdir PATH] [--datadir PATH]

Run the rundeck server, installing the necessary components if they do not
exist.
    --skipinstall         Skip the extraction of the utilities from the
                          launcher.
    --installonly         Perform installation only and do not start the
                          server.
 -b,--basedir <PATH>      The basedir
 -c,--configdir <PATH>    The location of the configuration.
 -d                       Show debug information
 -h,--help                Display this message.
 -p,--projectdir <PATH>   The location of Rundeck's project data.
 -s,--sbindir <PATH>      The install directory for the tools used by
                          administrators.
 -x,--bindir <PATH>       The install directory for the tools used by
                          users.

These options can be used to customize the directories used by the launcher. By default all the directories are organized by convention within the current working directory where the launcher jar is located.

System Properties

You can also customize the launcher behavior by using some java system properties.

Specify these properties using the normal -Dproperty=value commandline options to the java command:

  • server.http.port The HTTP port to use for the server, default "4440"
  • server.https.port The HTTPS port to use or the server, default "4443"
  • server.http.host Address/hostname to listen on, default is all addresses "0.0.0.0"
  • server.hostname Hostname to use for the server, default is the system hostname
  • server.web.context Web context path to use, such as "/rundeck". Default is "/".
  • rdeck.base Rundeck Basedir to use, default is the directory containing the launcher jar
  • server.datastore.path Path to server datastore dir
  • default.user.name Username for default user account to create
  • default.user.password Password for default user account to create
  • rundeck.jaaslogin "true/false" - if true, enable JAAS login. If false, use the realm.properties file for login information.
  • loginmodule.name Custom JAAS loginmodule name to use
  • loginmodule.conf.name Name of a custom JAAS config file, located in the server's config dir.
  • rundeck.config.name Name of a custom rundeck config file, located in the server's config dir.
  • rundeck.ssl.config Path to the SSL config properties file to enable SSL. If not set, SSL is not enabled.

For more information about using SSL, see Configuring Rundeck for SSL.

First-Time Setup

Logins

Rundeck supports a number of user directory configurations. By default, the installation uses a file based directory, but connectivity to LDAP is also available. See Administration - Authentication.

The Rundeck installation process will have defined a set of temporary logins useful during the getting started phase.

  • user: Has access to run commands and jobs but unable to modify job definitions. Password: "user"
  • admin: Belongs to the "admin" group and is automatically granted the "admin" and "user" role privileges. Password: "admin"

Group membership

If you installed Rundeck using the RPM installation method, it will have created a unix group called "rundeck".

$ groups rundeck
rundeck : rundeck

It also made several log files writable to members of the "rundeck" group.

$ ls -l /var/log/rundeck/command.log
-rw-rw-r-- 1 rundeck rundeck 588 Dec  2 11:24 /var/log/rundeck/command.log

If you want to use the Rundeck shell tools, be sure to add that group to the necessary user accounts.

Rundeck shell tool users that do not belong to group, rundeck, will get error messages like so:

$ rd-jobs
log4j:ERROR setFile(null,true) call failed. java.io.FileNotFoundException: /var/log/rundeck/command.log (Permission denied)

Consult the usermod command to modify a user account.