Difference between revisions of "Sysadmin"

From Earlham CS Department
Jump to navigation Jump to search
(→‎Common Tasks)
 
(41 intermediate revisions by 7 users not shown)
Line 1: Line 1:
−
 
 
This is the hub for the CS sysadmins on the wiki.
 
This is the hub for the CS sysadmins on the wiki.
  
−
== Common Tasks ==
+
= Overview =
−
 
 
−
* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]] <- log in here with wiki credentials to begin learning to be an admin
 
−
* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
 
−
* [[Sysadmin:SSH|Useful ssh information for admins]]
 
−
* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
 
−
* [[Sysadmin:SlackAndGitLab | Slack and GitLab integration]]
 
−
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
 
−
* [[Sysadmin:User Management | User Management]]
 
−
** [[Sysadmin:Contacting all users|Contacting all users]]
 
−
** [[Reset password]]
 
−
* [[Sysadmin:Software installation | Software installation]]
 
−
** [[Modules | Installing software under modules ]]
 
−
* [[Sysadmin:Monitoring | Monitoring ]]
 
−
* [[Sysadmin:Backup|Backup]]
 
−
* [[Sysadmin:AddComputer|Add a computer]]
 
−
** [[Sysadmin:Setting up Lovelace Lab Machines | Setting up Lovelace Lab Machines]]
 
−
* [[Senior projects]]
 
−
* [[ShutdownProcedure| Shutdown and Boot up]]
 
−
** [[Sysadmin:TestingServices | Testing services]] (After a reboot, upgrade, change in the phase of the moon, etc.)
 
−
* [[Password managers]]
 
−
* [[Server safety]]
 
−
* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 
−
** [[Sysadmin:ImportantInfo:SSLcerts| Generating SSL Certificates]]
 
−
* [[Sysadmin:Launch at startup|Launch a process at startup]]
 
−
* [[Sysadmin:CS-ITS Interoperability|Working with ITS]]
 
−
* [[Sysadmin:Recurring spending | Recurring spending ]]
 
−
 
 
−
== Services ==
 
−
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
 
−
* [[Sysadmin:Jupyterhub Notebook Server|Jupyterhub]] and [[Nbgrader notes|NBGrader]]
 
−
* [[Sysadmin:Web Servers|Web Servers and Websites]]
 
−
* [[Sysadmin:Services:Databases|Databases]]
 
−
* [[Sysadmin:DNS & DHCP|DNS and DHCP]]
 
−
* [[Sysadmin:VirtualBox | VirtualBox]]
 
−
* [[Sysadmin:Services:XenServerSetup | Xen Server]]
 
−
* [[X Applications]]
 
−
* [[Bash_start_up_script|Bash startup scripts]]
 
−
* [[Sysadmin:AWS|AWS]]
 
−
For old documentation, see: [[Sysadmin:Old | Old Wiki Information]]
 
−
 
 
−
= Machines and Brief Descriptions of Services =
 
  
 
[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!]
  
−
=== Compute (servers and clusters) ===
+
== Server room ==
−
 
 
−
We have CS and cluster machines.
 
−
 
 
−
CS machines:
 
−
* bowie: hosts and exports user files; Jupyterhub; landing server
 
−
* smiley: VM host, not accessible to regular users
 
−
* web: website host
 
−
* net: network administration host for CS
 
−
* code: GitLab host
 
−
* auth: host of the LDAP user database
 
−
 
 
−
Cluster machines:
 
−
* hopper: landing server
 
−
* bronte, pollock, lovelace: large compute servers
 
−
* layout, whedon: clusters of multiple nodes linked together through a switch and managed through a headnode
 
−
* sakurai: big data storage and exports
 
−
* meier, miyamoto: backup servers
 
−
* monitor: server monitoring
 
  
−
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.
+
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]].
  
−
==== Specialized resources ====
+
Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM
  
−
Specialized computing applications are supported on the following machines:
+
== Compute Resources ==
  
−
* [[Sysadmin:GPGPU|GPU’s for AI/ML/data science]]: layout cluster
+
[https://wiki.cs.earlham.edu/index.php/Sysadmin:Computer_Resources Machines and VMs related information here!]
−
* virtualization: smiley
 
−
* containers: bowie
 
  
−
=== Network ===
+
== Network ==
  
 
We have two network fabrics linking the machines together. There are three subdomains.
 
We have two network fabrics linking the machines together. There are three subdomains.
  
−
==== 10 Gb ====
+
=== 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.
 
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) ====
+
=== 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.
 
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.
Line 91: Line 29:
 
Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
 
Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
  
−
==== Intra-cluster fabrics ====
+
=== Intra-cluster fabrics ===
  
−
The layout cluster has an Infiniband infrastructure. Whedon has only a 1Gb infrastructure.
+
The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.
  
−
=== Power ===
+
== 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.
 
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 ==
  
 
HVAC systems are static and are largely managed by Facilities.
 
HVAC systems are static and are largely managed by Facilities.
Line 106: Line 44:
  
 
[[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.]]
 +
 +
= New sysadmins =
 +
 +
These pages will be helpful for you if you're just starting in the group:
 +
 +
* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]]
 +
* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
 +
* [[Sandbox Notes|Sandbox Notes]]
 +
* [[Password managers]]
 +
* [[Server safety]]
 +
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
 +
 +
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===
 +
* [http://monitor.cluster.earlham.edu:8088/packages Porter's Package Explorer]
 +
 +
===Technical docs===
 +
 +
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
 +
* [[Server safety]]
 +
* [[Sysadmin:Backup|Backup]]
 +
* [[Sysadmin:Monitoring | Monitoring ]]
 +
* [[Sysadmin:SSH|SSH info relevant to admins]]
 +
* [[Sysadmin:User Management | User Management]] and [[Sysadmin:LDAP|LDAP]] generally
 +
* [[Sysadmin:Jupyterhub Notebook Server|Jupyterhub]] and [[Nbgrader notes|NBGrader]]
 +
* [[Sysadmin:MailStack|Email service]]
 +
* [[Sysadmin:XenDocs | Xen Server]]
 +
* [[Sysadmin:NFS|Network File System (NFS)]]
 +
* [[Sysadmin:Web Servers|Web Servers and Websites]]
 +
* [[Sysadmin:Services:Databases|Databases]]
 +
* [[Sysadmin:DNS & DHCP|DNS and DHCP]]
 +
* [[Sysadmin:AWS|AWS]]
 +
* [[Bash_start_up_script|Bash startup scripts]]
 +
* [[Sysadmin:VirtualBox | VirtualBox]]
 +
* [[X Applications]]
 +
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
 +
* [[Sysadmin:Firewall|Firewall]] running on babbage.cs.e.e
 +
* [[Sysadmin:Setting_up_Lovelace_Lab_Machines|Setting up Lab Machines]]
 +
 +
===Common tasks===
 +
* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
 +
* [[Sysadmin:Contacting all users|Contacting all users]]
 +
* [[Reset password]]
 +
* [[Sysadmin:Software installation | Software installation]]
 +
* [[Modules | Installing software under modules ]]
 +
* [[Sysadmin:AddComputer|Add a computer to CS or cluster domains]]
 +
* [[Senior projects|Supporting senior projects]]
 +
* [[ShutdownProcedure|How to do a planned shutdown and reboot of the system]]
 +
** [[Sysadmin:TestingServices | Testing services]] (after a reboot, upgrade, change in the phase of the moon, etc.)
 +
* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 +
* [[Sysadmin:Launch at startup|Launch a process at startup]]
 +
* [[Sysadmin:Psql-setup | setup psql for cs430 students]]
 +
 +
===Group and institution information===
 +
* [[Sysadmin:CS-ITS Interoperability|Working with ITS]]
 +
* [[Sysadmin:Recurring spending | Recurring spending ]]
 +
* [[Sysadmin:SlackAndGitLab | Slack and GitLab integration]]

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

Retrieved from "https://wiki.cs.earlham.edu/index.php?title=Sysadmin&oldid=18143"