Difference between revisions of "Sysadmin"

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__NOTOC__
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This is the hub for the CS sysadmins on the wiki.
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== Systems Administration Documentation ==
 
  
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= Overview =
  
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{|
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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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|- valign="top"
 
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|
 
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<div style="border:10px solid #E3E0FA; padding:5px">
 
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<div style="background-color:#D7D1F8; padding:5px;">
 
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=== Works in Progress ===
 
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</div>
 
  
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* [[Sysadmin:handbook|Handbook (WIP)]]
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== Server room ==
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* [[Sysadmin:Looking at DNS and DHCP|Looking at DNS and DHCP]]
 
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* [[Sysadmin:Temporary Page | Temporary Page for Wiki Adjustment]]
 
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* [[Sysadmin: Upgrading FreeBSD | Upgrading FreeBSD]]
 
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* [[Sysadmin:Fail2Ban on FreeBSD | Fail2Ban on FreeBSD]]
 
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* [[Sysadmin:Rebuilding the lovelace kernel | Rebuilding the Lovelace Kernel]]
 
  
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<!-- This has to stay as part of the formatting -->
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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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</div>
 
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| style="width:50px;" |
 
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|
 
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<div style="border:10px solid #E0EAF8; padding:5px;">
 
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<div style="background-color:#CEDEF4; padding:5px;">
 
  
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=== Regular Stuff ===
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Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM
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</div>
 
  
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* [[Sysadmin:Backup|Backup]] (needs to be updated after new setup)
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== Compute Resources ==
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* [[Sysadmin:Contacting all users|Contacting all users]]
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* [[Sysadmin:AddComputer|Add a computer]]
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[https://wiki.cs.earlham.edu/index.php/Sysadmin:Computer_Resources Machines and VMs related information here!]
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* [[Sysadmin:New Sysadmins|Welcoming a new sysadmin to the fold]]
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== Network ==
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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.
 +
 
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Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
 +
 
 +
=== Intra-cluster fabrics ===
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The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.
 +
 
 +
== 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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<!-- This has to stay as part of the formatting -->
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== HVAC ==
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</div>
 
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|}
 
  
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HVAC systems are static and are largely managed by Facilities.
  
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{|
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[[Topology|See full topology diagrams here.]]
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|- valign="top"
 
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<div style="border:10px solid #FFDFFF; padding:5px;">
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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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<div style="background-color:#FFCEFF; padding:5px;">
 
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=== Services ===
 
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</div>
 
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* [[Sysadmin:User Management|User Management]]
 
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* [[Sysadmin:Services:Databases|Databases]]
 
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* [[Sysadmin:Services:Email|Email]]
 
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* [[Sysadmin:Services:Apache2|Apache2]]
 
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* [[Sysadmin:Services:SystemImager|System Imager]]
 
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* [[Sysadmin:Services:TracSVN|Trac + svn]]
 
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* [[Sysadmin:Services:DNS and DHCP|DNS and DHCP]]
 
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* [[Sysadmin:Services:Virtualization | Virtualization]]
 
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* [[Sysadmin:Services:LVM|LVM]]
 
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* [[Sysadmin:Services:Printers|Printers]]
 
  
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<!-- This has to stay as part of the formatting -->
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= New sysadmins =
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</div>
 
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| style="width:50px;" |
 
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|
 
  
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<div style="border:10px solid #DBF0F7; padding:5px;">
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These pages will be helpful for you if you're just starting in the group:
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<div style="background-color:#C9EAF3; padding:5px;">
 
  
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=== Servers ===
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* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]]
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</div>
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* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
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* [[Sysadmin:SvcChart|Service Chart]]
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* [[Sandbox Notes|Sandbox Notes]]
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* [[Sysadmin:Monitoring|Monitoring]]
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* [[Password managers]]
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* [[Sysadmin:Quark | Quark]]
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* [[Server safety]]
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* [[Sysadmin:Forty-Two | Forty-two]]
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* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
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* [[Sysadmin:Lovelace | Lovelace]]
 
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* [[Sysadmin:Proto | Proto]]
 
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* [[Sysadmin:RetiredServers | Retired Servers]]
 
  
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<!-- This has to stay as part of the formatting -->
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Note: you'll need to log in with wiki credentials to see most Sysadmin pages.
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</div>
 
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| style="width:50px;" |
 
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|
 
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<div style="border:10px solid #FFFFC8; padding:5px;">
 
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<div style="background-color:#FFFFB5; padding:5px;">
 
  
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=== ACL Workstations ===
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= Additional information =
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</div>
 
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* [[Sysadmin:ACL:Installation|ACL Installation procedure]]
 
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* [[Sysadmin:AclImage|ACL Package Information]]
 
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* [[Sysadmin:Acl Locations|ACL Locations]]
 
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* [[Sysadmin:Software for Chemistry ACLs|Software for Chemistry ACLs]]
 
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* [[Sysadmin:ACL:UpProp|Proposed ACL Update policy]]
 
  
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<!-- This has to stay as part of the formatting -->
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These pages contain a lot of the most important information about our systems and how we operate.
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</div>
 
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|}
 
  
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===Handy Tools===
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* [http://monitor.cluster.earlham.edu:8088/packages Porter's Package Explorer]
  
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{|
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===Technical docs===
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|- valign="top"
 
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|
 
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<div style="border:10px solid #D6F8DE; padding:5px;">
 
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<div style="background-color:#BDF4CB; padding:5px;">
 
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=== Networking ===
 
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</div>
 
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* [[Sysadmin:Networking:NetworkLayout|Network Layout (as of 08/2006)]]
 
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* [[Sysadmin:Networking:D224 cable plant|D224 cable plant]]
 
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* [[Sysadmin:Networking:Fiber plans|Fiber plans]]
 
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* [[Sysadmin:Networking:Machine_room|Machine room]]
 
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* [[Sysadmin:Networking:Rack notes|Rack notes]]
 
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* [[Sysadmin:Networking:Public|Public Network]]
 
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* [[Sysadmin:Networking:NetworkTopo|Old Network Topo Figures]]
 
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* [[Sysadmin:Networking:NetworkDiagram|Network layout (May 2007)]]
 
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* [[Sysadmin:Networking:Alternate Network Path|Alt Network path]]
 
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* [[Sysadmin:UPS Setup]]
 
  
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<!-- This has to stay as part of the formatting -->
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* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
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</div>
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* [[Server safety]]
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| style="width:50px;" |
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* [[Sysadmin:Backup|Backup]]
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|
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* [[Sysadmin:Monitoring | Monitoring ]]
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<div style="border:10px solid #F0DDD5; padding:5px;">
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* [[Sysadmin:SSH|SSH info relevant to admins]]
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<div style="background-color:#E4C0B1; padding:5px;">
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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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=== Miscellaneous ===
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===Common tasks===
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</div>
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* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
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* [[SysadminContactInfo|Contact Information]]
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* [[Sysadmin:Contacting all users|Contacting all users]]
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* [[Sysadmin:ImportantInfo:PhoneNumbers|Phone Numbers]]
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* [[Reset password]]
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* [[Sysadmin:ImportantInfo:WebSites|Web Sites]]
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* [[Sysadmin:Software installation | Software installation]]
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* [[Sysadmin:ImportantInfo:AuthenticationInfo|Authentication Information]]
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* [[Modules | Installing software under modules ]]  
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* [[Sysadmin:ImportantInfo:PowerFailure|Power Failure]]
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* [[Sysadmin:AddComputer|Add a computer to CS or cluster domains]]
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* [[Sysadmin:ImportantInfo:UPS|UPS]]
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* [[Senior projects|Supporting senior projects]]
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* [[Sysadmin:ImportantInfo:SSLcerts|Generating SSL Certificates]]
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* [[ShutdownProcedure|How to do a planned shutdown and reboot of the system]]
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* [[Sysadmin:Power draws|Power draws]]
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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:ImportantInfo:SunHardware|Working with Sun Hardware]]
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* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
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* [[Sysadmin:Passwords]]
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* [[Sysadmin:Launch at startup|Launch a process at startup]]
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* Patching
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* [[Sysadmin:Psql-setup | setup psql for cs430 students]]
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** [[LinuxKernelPatching|Linux Kernel Patching]]
 
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** [[FreeBSDKernelPatching|FreeBSD Kernel Patching]]
 
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* [[Sysadmin:SerialConsoleCableEnds|Cable Ends]]
 
  
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<!-- This has to stay as part of the formatting -->
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===Group and institution information===
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</div>
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* [[Sysadmin:CS-ITS Interoperability|Working with ITS]]
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|}
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* [[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"