Amazon Linux 2 installation prerequisites
Prepare the system and ThoughtSpot clusters for installation.
These are the general steps for installing ThoughtSpot on Amazon Linux 2:
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| ThoughtSpot recommends using private subnets for communication. Wherever there is a need to connect to the public internet, you should do it through a NAT gateway. |
Set up hosts for the ThoughtSpot cluster
Set up hosts for the ThoughtSpot cluster on Amazon Web Services.
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Refer to AWS configuration options for the exact specification for the hosts in regard to CPU, memory, and disks.
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Refer to Set up AWS resources for ThoughtSpot to create and launch your AWS virtual machines.
[Optional] Set up AWS Systems Manager Agent
If you plan to use the AWS SSM agent as an alternative to SSH, create a new IAM role while creating VMs. This IAM role must have an SSM policy to grant AWS SSM permission to perform actions on your instances. Refer to Create an IAM instance profile for Systems Manager.
You must install the SSM agent on each node. Refer to Manually install SSM Agent on EC2 instances for Linux, if the SSM agent is not already on each node.
Partition the hosts
Ensure that all ThoughtSpot hosts meet the following partition and sizing requirements. All drives must be SSDs.
Do not partition the data drives. ThoughtSpot partitions the data drives during installation. For information about data drive specifications, refer to the intro articles for each platform linked in the set up hosts section of this article.
| Path | Required free space |
|---|---|
/ |
20 GB. This is the root drive. |
/tmp |
50 GB |
/export |
200 GB, on a separate filesystem. This must also be separate from the data drives. |
Enable the hosts to download Amazon Linux 2 packages
Repositories
- Yum repositories
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You must enable the following Yum repositories in your cluster:
epel,google-cloud-sdk,pgdg11, andpgdg95.
- Python repository
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For Python, ensure that the machine is able to reach the
PyPIrepository located at https://pypi.python.org/.
- R repository
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For R, ensure that the machine is able to reach the
CRANrepository located at https://cran.rstudio.com/. Make sure that you can download Amazon Linux 2 packages to all hosts, either from the official package repositories, or from a mirror repository owned and managed by your organization If you cannot access the Amazon Linux 2 repositories, there is no mirror repository in your organization, or you are unable to access Yum, Python, or R repositories, please contact ThoughtSpot Support.
Ensure tmp has permission 777 or 1777
The /tmp directory must have either the 777 or 1777 permission. 1777 is the 777 permission but with the sticky bit set. If you mount the /tmp directory as a separate partition, it must NOT have the noexec flag set.
Ensure /proc mount point flags are compatible
You cannot mount the /proc mount point with the hidepid flag. You must mount it without that flag.
Remove Defaults requiretty from /etc/sudoers
The /etc/sudoers file must not have the Defaults requiretty line. This line can cause cluster creation to fail.
[Optional] Enable an Ansible Control Server
Optionally configure an Ansible Control Server, on a separate host, to run the Ansible playbook that ThoughtSpot supplies.
You must install both rsync and Ansible on the Ansible Control Server host.
