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6.2. Using the Installation Scripts
You can deploy OpenShift Enterprise using the installation scripts, which include configurable parameters to help automate the installation of OpenShift Enterprise components on a Red Hat Enterprise Linux 6.6 system. By supplying the scripts with parameters relevant to your deployment requirements, you can get an environment running quickly without having to manually configure all of the required services.
For kickstarts, the
openshift.ks kickstart script is available at:
Example 6.1. Downloading the openshift.ks Kickstart Script
curl -O https://raw.githubusercontent.com/openshift/openshift-extras/enterprise-2.2/enterprise/install-scripts/openshift.ks
$ curl -O https://raw.githubusercontent.com/openshift/openshift-extras/enterprise-2.2/enterprise/install-scripts/openshift.ks
For pre-installed Red Hat Enterprise Linux 6.6 systems, the
openshift.sh bash script is the extracted %post section of the openshift.ks script and is available at:
Example 6.2. Downloading the openshift.sh Bash Script
curl -O https://raw.githubusercontent.com/openshift/openshift-extras/enterprise-2.2/enterprise/install-scripts/generic/openshift.sh
$ curl -O https://raw.githubusercontent.com/openshift/openshift-extras/enterprise-2.2/enterprise/install-scripts/generic/openshift.sh
The actions and parameters related to the installation and configuration of OpenShift Enterprise are the same between the two scripts. The commented notes in the header of the scripts provide extensive information on their usage and parameters.
Important
The sample deployment steps detailed later in this guide describe the various actions of the installation scripts. However, these deployment methods are independent of each other; this means that you can install and configure a complete broker or node host by either following the steps manually, or by running the scripts. The corresponding functions of the scripts are identified in the respective sample deployment steps.
Supplying Parameters to the Scripts
When using the openshift.ks script, you can supply parameters as kernel parameters during the kickstart process. When using the openshift.sh script, you can similarly supply parameters as command-line arguments. See the commented notes in the header of the scripts for alternative methods of supplying parameters using the openshift.sh script.
The installation scripts are highly customizable, and as such can be used for a variety of deployment scenarios using many different configurations. The following sections highlight some important parameters, show basic script usage, and provide examples on installing and configuring sample hosts for a simple deployment.
Note
For the purposes of this guide, the following examples use the
openshift.sh script by supplying parameters as command-line arguments. The same parameters can be supplied as kernel parameters for kickstarts using the openshift.ks script.
6.2.1. Selecting Components to Install
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If you do not supply any parameters, the scripts install all OpenShift Enterprise components on a single host with the default configuration. Using the
install_components parameter, the scripts can be configured to install one or more of the following components on a single host:
| Options | Description |
|---|---|
broker | Installs the broker application and tools. |
named | Supporting service. Installs a BIND DNS server. |
activemq | Supporting service. Installs the messaging bus. |
datastore | Supporting service. Installs the MongoDB datastore. |
node | Installs node functionality, including cartridges. |
Warning
The OpenShift Enterprise security model assumes that broker and node components are installed on separate hosts. Running a broker and node on the same host is not supported.
You can install any combination of components on a host, as long as broker and node components are installed on separate hosts. Any component can also be installed as a standalone host.
For example, the following command runs the
openshift.sh script and installs the broker, named, activemq, and datastore components on a single host, using default values for all unspecified parameters:
Example 6.3. Installing the broker, named, activemq, and datastore Components Using openshift.sh
sudo sh openshift.sh install_components=broker,named,activemq,datastore
$ sudo sh openshift.sh install_components=broker,named,activemq,datastoresudo sh openshift.sh install_components=broker,named,activemq,datastoresudo sh openshift.sh install_components=broker,named,activemq,datastore
For another example, the following command runs the
openshift.sh script and installs only the node component on a single host, using default values for all unspecified parameters:
Example 6.4. Installing the node Component Using openshift.sh
sudo sh openshift.sh install_components=node
$ sudo sh openshift.sh install_components=nodesudo sh openshift.sh install_components=nodesudo sh openshift.sh install_components=node
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