Before installing Appian, you must download and install the following third-party software:
In addition, you must download the following Appian software from the Downloads tab on MyAppian:
Product license files are required to start Appian after it has been installed. Long term product licenses can only be requested after Appian is installed. To request and install temporary or long-term licenses, please follow the steps outlined in the Requesting and Installing a License page.
Note: If you are migrating from an older version and have a product license from a previous version of Appian, it is valid to use with this version.
To set the JAVA_HOME
and PATH
environment variables in Linux:
/etc
directory.
Note: You must have superuser rights to modify the profile file.
Add the following lines to the end of the file where the value is the Java installation path:
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export JAVA_HOME=<APPIAN_HOME>/java
export PATH=$JAVA_HOME/bin:$PATH:
To set the JAVA_HOME
and PATH
environment variables in Windows:
Note: Instructions for accessing the Control Panel may vary slightly based on the version of Windows you are using.
If it is not present, click New, and then enter the following information:
Setting | Value |
---|---|
Variable name | JAVA_HOME |
Variable value | <APPIAN_HOME>\java |
Add the following value if it is not present (note that each value is separated by a semicolon):
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;%JAVA_HOME%\bin
Caution: Important: If the JAVA_HOME environment variable is set to the installation path of another JDK version or a runtime environment that is not the JDK installation path, Appian will not start correctly.
Configure the UNIX user account and group that owns the application before running the setup program. A non-root user must have the following rights assigned when running the setup, and the APPIAN_HOME and JAVA_HOME directories must exist prior to running the installer.
Directory or File | Read | Write | Execute |
---|---|---|---|
APPIAN_HOME | Yes | Yes | Yes |
JAVA_HOME | Yes | No | Yes |
Installation Package | Yes | No | Yes |
The maximum allowable number of file descriptors available to the user running Appian may need to be increased. In order to determine if the limit needs to be increased, log in using the Appian application user account, and then run the following command:
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ulimit -n
If the value returned by ulimit -n
is less than 100000, then increase the limit by running the following command:
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ulimit -n 100000
Repeat this procedure for all servers running any component of the Appian architecture in all environments. For example, if you are using development, staging, and production environments, then you would repeat this procedure on each one.
Note: If the value of 100000 exceeds the total number of open files allowable for the system, consult your operating system documentation for instructions on configuring the limit on the total number of open files (this typically located in /proc/sys/fs/file-max
).
The system locale must be defined in order to install Appian. You will not be able to install Appian if the system locale is not defined.
In most cases, the system locale setting will already be set correctly. However, there is a rare issue that may be encountered on new or virtualized operating system installations. The instructions below describe how to verify the system locale on both supported platforms.
To verify the locale setting in Linux
Open Bash, and use the locale command to display the locale settings. If the locale is set, you will see something similar to the list below:
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LANG=en_US
LC_CTYPE="en_US"
LC_NUMERIC="en_US"
LC_TIME="en_US"
LC_COLLATE="en_US"
LC_MONETARY="en_US"
LC_MESSAGES="en_US"
If the locale settings are not displayed, you must update or create the i18n file by doing the following steps:
/etc/sysconfig/i18n
in a text editor.Add the appropriate LANG=
and LC_ALL=
parameters. For example, if you are using English in the United States, you would define both parameters using en_US:
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LANG=en_US LC_ALL=en_US
To verify the system locale setting in Windows
If the locale is not set correctly, make the necessary changes and reboot the machine.
Appian components communicate with each other over specified network ports. If you are preparing a distributed installation, you must first ensure that the required ports are open between the servers that host the different Appian components.
Appian uses standalone deployment of Elasticsearch for the search server. This provides increased security and reliability for the search server. The following system configurations are required for standalone deployment of search server.
Elasticsearch uses a mmapfs
directory by default to store its indices. The default operating system limits on mmap counts could be low and result in out of memory exceptions. On Linux, increase the limits by running the following command as root:
sysctl -w vm.max_map_count=262144
Minimum value of 262144 is required. To set this value permanently, update the vm.max_map_count
setting in /etc/sysctl.conf
. To verify after rebooting, run sysctl vm.max_map_count
.
No such setting is required for the Windows operating system.
Elasticsearch uses a number of thread pools for different types of operations. It is important that it is able to create new threads whenever needed. Make sure that the number of threads that the search server can create is unlimited.
This can be done by setting ulimit -u unlimited
as root before starting the search server, or by setting nproc
to unlimited
in /etc/security/limits.conf
.
No such setting is required for the Windows operating system.
Installation Prerequisites