Step 1: Verify Prerequisites for Linux Installation


System Requirements
  • We recommends installing Skedler-Alerts in a separate VM or Docker container or server.
  • Linux Operating System with x86 64-bit architecture
    • Ubuntu version 12.04 and above
    • Debian version 7 and above
  • Minimum of 2 CPU cores and 8 GB of RAM is recommended for deploying Skedler-Alerts
  • If you are using Skedler-Alerts 3.1 version or earlier, please create alerts with new index (or) deleting the existing alerts index.


Library Dependencies

GLIBCXX libraries

Skedler-Alerts is dependent on libstdc++ library.

Following are the GLIBCXX versions that the code depends on

  • libstdc++.so.6 (GLIBCXX_3.4.9) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
  • libstdc++.so.6 (GLIBCXX_3.4.15) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
  • libstdc++.so.6 (GLIBCXX_3.4) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
To check the versions on your server. Please run the following command

For CentOS

strings /usr/lib64/libstdc++.so.6 | grep GLIBCXX 

For Debian/Ubuntu

strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX

If the version is not available, update the GCC compiler.


Hostname Configuration

Skedler-Alerts requires hostname of the server in which Skedler-Alerts is installed to be configured in /etc/hosts. 

1.  Check hostname by giving this command: 

     $hostname   

In alertConfig.yml the host parameter is the host in which Skedler-Alerts binds.

2.  If the host is configured as 127.0.0.1 then make sure you have an entry in /etc/hosts as mentioned below,

     127.0.0.1 localhost

     Note: If you are binding Skedler-Alerts to localhost you can't access it from outside.      

3. However, if the bind address is 0.0.0.0 in alertconfig.yml then Skedler-Alerts binds to any IP (configured for your system). In this case, your entry in hosts file(/etc/hosts) should be

    <ipaddress> <hostname>

4.  If the host(IP address of the server) in alertconfig.yml is changed other than the default value 0.0.0.0 then there should be an entry for the host in /etc.hosts like

     <ipaddress> <hostname>

 5.  Reboot the system.

 

Note: If you are using any proxy server add your hostname to a no_proxy list in the file /etc/environment add the following line,

           no_proxy="<ipaddress>,<hostname>"


Elasticsearch version

Skedler-Alerts supports Elasticsearch version from 2.0 to 7.8.0

JAVA_HOME Configuration

Skedler-Alerts requires Java 7, 8 or 9 and JAVA_HOME should be configured. Check if JAVA_HOME is configured using the following command:


> $echo JAVA_HOME 

 

If the result is empty, follow the below steps to configure JAVA_HOME.

  • For Ubuntu/Debian in /etc/bash.bashrc and for Centos/Redhat in /etc/.bashrc, add the JAVA_HOME variable as follows, 

export JAVA_HOME = <your_java_path>

  • In /etc/environment file add  the line as follows: 
JAVA_HOME = "<your_java_path>"



NOTE: Skedler user requires user home directory. To check user home directory use the following command,          
> echo $HOME

 

Step 2: Download

  • Download the latest version of Skedler-Alerts from Free Trial page.

Step 3: Extract

  • Extract the skedler-alerts.tar.gz file to the desired folder (e.g., /opt). For convenience, let us call this folder as $alert_home.

Step 4: Configure Permissions and JAVA_HOME
  • Provide read/write permissions to the following folders, if they are configured in alertconfig.yml
    • Skedler-Alerts folder storing JSON file configured for the alerts_path parameter in alertconfig.yml
    • UI files folder configured for the parameter ui_files_location

 

  • Set the value for the variable JAVA_HOME in the $_home/install.sh script as follows:
    • Check JAVA_HOME using the command echo $JAVA_HOME.
    • Copy and paste the output into the install.sh

      rVpzGe5A_ol3NsMP-ViOvJNCMIkPGJ4yfA.png

  • Save install.sh.


Step 5: Install Alerts

  • Provide the required permission to $alert_home/install.sh script file using the command
       sudo chmod u+x install.sh
  • Install Skedler-Alerts using the below command. Run install.sh as sudo user

             sudo ./install.sh


Step 6: Configure alertconfig.yml

  • Go to config folder using the command cd config.
  • Open alertconfig.yml (e.g., vi /opt/alert/config/alertconfig.yml)

      ElasticSearch  URL configuration

  • Add Elasticsearch URL with the port (even if the port is 80) in the alertconfig.yml file in the following format


      Proxy server basic authentication configuration

  • If you are using Nginx, follow the steps below.

    If Nginx is configured as a reverse proxy for Elasticsearch, configure Nginx username and password for Elasticsearch as shown:

  • Note: If you are using Shield then refer to Step-by-Step Configuration Guide for Shield.
  • Save changes to alertconfig.yml

For more configuration options please refer alertconfig.yml configuration.


Step 7: Start Alerts

You can start Skedler-Alerts as a service or manually.

  • To start Skedler-Alerts as a service, execute

               sudo service alert start  

  • To start Skedler-Alerts manually

               Change directory to $alert_home (e.g., /opt/alert) and execute

                 bin/alert

Step 8: Access Alerts

Skedler-Alerts is accessed from the following URL http://<yourServer>:3001.  The License Activation page is displayed on successful installation.


Step 9: Activate Alerts

Skedler-Alerts can be activated Online or Offline. Refer the following articles to activate the license


Step 10: Configure Settings for Alerts

To configure Skeldler-Alerts settings, refer to How to configure time zone settings, index pattern settings, email settings, Webhook settings for skedler-alerts



Step 11: Schedule Alerts

To create alerts, refer to Step-by-Step User Guide for Creating Skedler-Alerts  


References