Difference between revisions of "Sysadmin"

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== Systems Administration Documentation ==
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This is the hub for the CS sysadmins on the wiki.
  
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* [[BackupProcedure|Backup Procedure]]
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= Overview =
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* [[ServerInfo|Server Information]]
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* Patching
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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!]
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** The kernel
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*** [[LinuxKernelPatching|Linux Kernel Patching]]
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== Server room ==
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*** [[FreeBSDKernelPatching|FreeBSD Kernel Patching]]
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** Software
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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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* [[PowerFailure|Power Failure]]
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* [[SysadminContactInfo|Contact information]]
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Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM
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* [[SystemImager]]
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* [[Important Phone Numbers]]
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== Compute Resources ==
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* [[Sysadmin:Important websites|Important websites]]
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* [[Budget]]
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[https://wiki.cs.earlham.edu/index.php/Sysadmin:Computer_Resources Machines and VMs related information here!]
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* [[Networking]]
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* [[Databases]]
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== Network ==
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* [[Burning CDs]]
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* [[Todo]]
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We have two network fabrics linking the machines together. There are three subdomains.
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* [[Setting up Jabberd]]
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* [[Sysadmin:UPS|UPS]]
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=== 10 Gb ===
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* [[Sysadmin:SunHardware|Working with Sun hardware]]
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* [[Sysadmin:Power draws|Power draws]]
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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.
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* [[Sysadmin:Authentication Information|Authentication Information]]
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=== 1 Gb (cluster, cs) ===
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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.
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Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
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=== Intra-cluster fabrics ===
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The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.
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== Power ==
 +
 
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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.
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== HVAC ==
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HVAC systems are static and are largely managed by Facilities.
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[[Topology|See full topology diagrams here.]]
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[[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 =
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 +
These pages will be helpful for you if you're just starting in the group:
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* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]]
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* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
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* [[Sandbox Notes|Sandbox Notes]]
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* [[Password managers]]
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* [[Server safety]]
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* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
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Note: you'll need to log in with wiki credentials to see most Sysadmin pages.
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= Additional information =
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 +
These pages contain a lot of the most important information about our systems and how we operate.
 +
 
 +
===Handy Tools===
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* [http://monitor.cluster.earlham.edu:8088/packages Porter's Package Explorer]
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 +
===Technical docs===
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 +
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
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* [[Server safety]]
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* [[Sysadmin:Backup|Backup]]
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* [[Sysadmin:Monitoring | Monitoring ]]
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* [[Sysadmin:SSH|SSH info relevant to admins]]
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* [[Sysadmin:User Management | User Management]] and [[Sysadmin:LDAP|LDAP]] generally
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* [[Sysadmin:Jupyterhub Notebook Server|Jupyterhub]] and [[Nbgrader notes|NBGrader]]
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* [[Sysadmin:MailStack|Email service]]
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* [[Sysadmin:XenDocs | Xen Server]]
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* [[Sysadmin:NFS|Network File System (NFS)]]
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* [[Sysadmin:Web Servers|Web Servers and Websites]]
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* [[Sysadmin:Services:Databases|Databases]]
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* [[Sysadmin:DNS & DHCP|DNS and DHCP]]
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* [[Sysadmin:AWS|AWS]]
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* [[Bash_start_up_script|Bash startup scripts]]
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* [[Sysadmin:VirtualBox | VirtualBox]]
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* [[X Applications]]
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* [[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]]
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===Common tasks===
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* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
 
* [[Sysadmin:Contacting all users|Contacting all users]]
 
* [[Sysadmin:Contacting all users|Contacting all users]]
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* Network topology
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* [[Reset password]]
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** [[Image:Current_network.fig|Current Network Topology]]
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* [[Sysadmin:Software installation | Software installation]]
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** [[Image:Old_network.fig|Old Network Topology]]
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* [[Modules | Installing software under modules ]]  
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** [[Image:Future_network.fig|Future Network Topology]]
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* [[Sysadmin:AddComputer|Add a computer to CS or cluster domains]]
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* [[Sysadmin:Building Apache2 on FreeBSD|Building Apache2 on FreeBSD]]
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* [[Senior projects|Supporting senior projects]]
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* [[Sysadmin:Apache2|Apache2]]
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* [[ShutdownProcedure|How to do a planned shutdown and reboot of the system]]
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* [[Sysadmin:The Humidifier|The Humidifier]]
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** [[Sysadmin:TestingServices | Testing services]] (after a reboot, upgrade, change in the phase of the moon, etc.)
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* [[Sysadmin:2005-11-29 List|Sunday maintenance list]]
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* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
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* [[Sysadmin:Generating SSL certificates|Generating SSL certificates]]
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* [[Sysadmin:Launch at startup|Launch a process at startup]]
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* [[Sysadmin:Email|Email]]
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* [[Sysadmin:Psql-setup | setup psql for cs430 students]]
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* [[Sysadmin:Summer schedules|Summer schedules]]
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* [[Sysadmin:Random Notes (6/16)|Random Notes (6/16)]]
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===Group and institution information===
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* [[Sysadmin:Secure Console Server|Secure Console Server]]
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* [[Sysadmin:CS-ITS Interoperability|Working with ITS]]
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* [[Sysadmin:Recurring spending | Recurring spending ]]
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* [[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

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