Difference between revisions of "Sysadmin"

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[https://docs.google.com/drawings/d/1XaULz5IxXV_BZQjrko3QJ8wV5aXsSTYcSWxxT49OyZk/edit If you're visually inclined, we have a colorful and easy-to-edit map of our servers here!]
 
[https://docs.google.com/drawings/d/1XaULz5IxXV_BZQjrko3QJ8wV5aXsSTYcSWxxT49OyZk/edit If you're visually inclined, we have a colorful and easy-to-edit map of our servers here!]
  
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== Compute (servers and clusters) ==
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== Server room ==
  
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We have CS and cluster machines.
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Our servers are in Noyes, the science building that predates the CST. For general information about the server room and how to use it, check out [[Sysadmin:Server Room|this page]].
  
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CS machines:
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Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM
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* bowie: hosts and exports user files; Jupyterhub; landing server
 
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* smiley: VM host, not accessible to regular users
 
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* web: website host
 
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* net: network administration host for CS
 
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* code: GitLab host
 
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* auth: host of the LDAP user database
 
  
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Cluster machines:
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== Compute Resources ==
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* hopper: landing server, NFS host for cluster
 
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* bronte, pollock, lovelace: large compute servers
 
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* layout, wachowski: clusters of multiple nodes linked together through a switch and managed through a headnode
 
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* meier, miyamoto, sakurai: backup servers
 
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* monitor: server monitoring
 
  
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We have spare nodes on the old al-salam cluster’s rack. These should be used for services that can handle minutes to hours of downtime, as they only have one power supply.
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[https://wiki.cs.earlham.edu/index.php/Sysadmin:Computer_Resources Machines and VMs related information here!]
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=== Specialized resources ===
 
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Specialized computing applications are supported on the following machines:
 
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* [[Sysadmin:GPGPU|GPU’s for AI/ML/data science]]: layout cluster
 
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* virtualization: smiley
 
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* containers: bowie
 
  
 
== Network ==
 
== Network ==
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[[Sysadmin:Layers of abstraction for filesystems|A word about what's happening between files and the drives they live on.]]
 
[[Sysadmin:Layers of abstraction for filesystems|A word about what's happening between files and the drives they live on.]]
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= New sysadmins =
 
= New sysadmins =
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These pages contain a lot of the most important information about our systems and how we operate.
 
These pages contain a lot of the most important information about our systems and how we operate.
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===Handy Tools===
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* [http://monitor.cluster.earlham.edu:8088/packages Porter's Package Explorer]
  
 
===Technical docs===
 
===Technical docs===
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* [[X Applications]]
 
* [[X Applications]]
 
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
 
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
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* [[Sysadmin:Firewall|Firewall]] running on babbage.cs.e.e
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* [[Sysadmin:Setting_up_Lovelace_Lab_Machines|Setting up Lab Machines]]
  
 
===Common tasks===
 
===Common tasks===
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* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 
* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 
* [[Sysadmin:Launch at startup|Launch a process at startup]]
 
* [[Sysadmin:Launch at startup|Launch a process at startup]]
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* [[Sysadmin:Psql-setup | setup psql for cs430 students]]
  
 
===Group and institution information===
 
===Group and institution information===

Latest revision as of 08:32, 20 March 2024

This is the hub for the CS sysadmins on the wiki.

Overview

If you're visually inclined, we have a colorful and easy-to-edit map of our servers here!

Server room

Our servers are in Noyes, the science building that predates the CST. For general information about the server room and how to use it, check out this page.

Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM

Compute Resources

Machines and VMs related information here!

Network

We have two network fabrics linking the machines together. There are three subdomains.

10 Gb

We have 10Gb fabric to mount files over NFS. Machines with 10Gb support have an IP address in the class C range 10.10.10.0/24 and we want to add DNS to these addresses.

1 Gb (cluster, cs)

We have two class C subnets on the 1Gb fabric: 159.28.22.0/24 (CS) and 159.28.23.0/24 (cluster). This means we have double the IP addresses on the 1Gb fabric that we have on the 10Gb fabric.

Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.

Intra-cluster fabrics

The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.

Power

We have a backup power supply, with batteries last upgraded in 2019 (?). We’ve had a few outages since then and power has held up well.

HVAC

HVAC systems are static and are largely managed by Facilities.

See full topology diagrams here.

A word about what's happening between files and the drives they live on.

New sysadmins

These pages will be helpful for you if you're just starting in the group:

Note: you'll need to log in with wiki credentials to see most Sysadmin pages.

Additional information

These pages contain a lot of the most important information about our systems and how we operate.

Handy Tools

Technical docs

Common tasks

Group and institution information

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