Difference between revisions of "Sysadmin"

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__NOTOC__
 
  
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= Machines and Brief Descriptions of Services =
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This is the hub for the CS sysadmins on the wiki.
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== CS Machines ==
 
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[[File:Server_layout_summer2017.jpg|thumb|200px|right|Server layout as of May 2017]]
 
  
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{| style="float:left; margin-right:2px;"
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== Common Tasks ==
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| style="height:40px; width:150px; text-align:center; background-color:#54C571; border-left:solid 5px #54C571; border-top:solid 5px #54C571; border-bottom:solid 1px white; border-right:solid 5px #54C571; font-size:120%;" | NET <br> (vm1)
 
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|-
 
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| style="height:210px; width:150px; background-color:#54C571; border-left:solid 5px #54C571; border-bottom:solid 5px #54C571; border-right:solid 5px #54C571;" | [[LDAP Server]] <br> [[Sysadmin:DNS & DHCP | DNS]] <br> [[Sysadmin:DNS & DHCP | DHCP]] <br><br> Backup to Dali: etc, var
 
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|}
 
  
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{| style="float:left; margin-right:2px;"
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* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]] <- log in here with wiki credentials to begin learning to be an admin
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| style="height:40px; width:150px; text-align:center; background-color:#E77471; border-left:solid 5px #E77471; border-top:solid 5px #E77471; border-bottom:solid 1px white; border-right:solid 5px #E77471; font-size:120%;" | WEB <br> (vm2)
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* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
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|-
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* [[Sysadmin:SSH|Useful ssh information for admins]]
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| style="height:210px; width:150px; background-color:#E77471; border-left:solid 5px #E77471; border-bottom:solid 5px #E77471; border-right:solid 5px #E77471;" | [[Sysadmin:Email:Mailman | Mailman]] <br> [[Sysadmin:Mail Stack | Mail Stack]]<br> Apache2 <br> PostgresQL <br> MySQL <br> Wiki <br><br> Backup to Dali: etc, var
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* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
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|}
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* [[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 ]]
 +
* [[Sandbox Notes|Sandbox Notes]]
  
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{| style="float:left; margin-right:2px;"
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== Services ==
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| style="height:40px; width:150px; text-align:center; background-color:#C38EC7; border-left:solid 5px #C38EC7; border-top:solid 5px #C38EC7; border-bottom:solid 1px white; border-right:solid 5px #C38EC7; font-size:120%;" | TOOLS <br> (vm3)
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* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
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|-
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* [[Sysadmin:Jupyterhub Notebook Server|Jupyterhub]] and [[Nbgrader notes|NBGrader]]
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| style="height:210px; width:150px; background-color:#C38EC7; border-left:solid 5px #C38EC7; border-bottom:solid 5px #C38EC7; border-right:solid 5px #C38EC7;" | [[SageNB Server | SageNB Server]] <br> [[Jupyterhub notebook server | Jupyterhub Server]] <br> [[Sysadmin:Software Modules | Software Modules]] <br> NginX  <br>SSH<br>Users<br><br> Backup to Dali: etc, var, mnts, sage
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* [[Sysadmin:Web Servers|Web Servers and Websites]]
−
|}
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* [[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]]
  
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{| style="float:left; margin-right:2px;"
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= Machines and Brief Descriptions of Services =
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| style="height:55px; width:150px; text-align:center; background-color:#E3A869; border-left:solid 5px #E3A869; border-top:solid 5px #E3A869; border-bottom:solid 1px white; border-right:solid 5px #E3A869; font-size:120%;" | BABBAGE
 
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|-
 
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| style="height:210px; width:150px; background-color: #E3A869; border-left:solid 5px #E3A869; border-bottom:solid 5px #E3A869; border-right:solid 5px #E3A869;" | [[Sysadmin:Firewall | Firewall]]
 
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|}
 
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{|
 
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| style="height:55px; width:150px; text-align:center; background-color:#EEDC82; border-left:solid 5px #EEDC82; border-top:solid 5px #EEDC82; border-bottom:solid 1px white; border-right:solid 5px #EEDC82; font-size:120%;" | [[Sysadmin:Servers:Proto | PROTO]]
 
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|-
 
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| style="height:210px; width:150px; background-color: #EEDC82; border-left:solid 5px #EEDC82; border-bottom:solid 5px #EEDC82; border-right:solid 5px #EEDC82;" | Weather Monitoring <br> GPS/NTP <br> Energy Monitoring <br><br> Backup to Dali: etc, var
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:40px; width:150px; text-align:center; background-color:#FF7E6D; border-left:solid 5px #FF7E6D; border-top:solid 5px #FF7E6D; border-bottom:solid 1px white; border-right:solid 5px      #FF7E6D; font-size:120%;" | BOWIE
 
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|-
 
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| style="height:210px; width:150px; background-color:#FF7E6D; border-left:solid 5px #FF7E6D; border-bottom:solid 5px #FF7E6D; border-right:solid 5px #FF7E6D;" | PostgreSQL <br> Docker <br><br> Backup to Dali: etc, var
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:40px; width:150px; text-align:center; background-color:#54C571; border-left:solid 5px #54C571; border-top:solid 5px #54C571; border-bottom:solid 1px white; border-right:solid 5px      #54C571; font-size:120%;" | SMILEY
 
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|-
 
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| style="height:210px; width:150px; background-color:#54C571; border-left:solid 5px #54C571; border-bottom:solid 5px #54C571; border-right:solid 5px #54C571;" | [[XenDocs]] <br> NET <br> WEB <br>[[NFS]]<br><br> Backup to Dali: etc, var
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:40px; width:150px; text-align:center; background-color:#E77471; border-left:solid 5px #E77471; border-top:solid 5px #E77471; border-bottom:solid 1px white; border-right:solid 5px      #E77471; font-size:120%;" | SHINKEN
 
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|-
 
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| style="height:210px; width:150px; background-color:#E77471; border-left:solid 5px #E77471; border-bottom:solid 5px #E77471; border-right:solid 5px #E77471;" | Users <br> SSH <br> Add machines
 
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|}
 
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<br> <br> <br> <br> <br> <br><br> <br> <br> <br> <br> <br>
 
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== Cluster Machines ==
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px      #0099cc; font-size:120%;" | HOPPER
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" | Users <br> SSH <br> NFS server <br> LDAP server <br> [[Sysadmin:Software Modules | Software Modules]] <br> PostgreSQL <br> Wiki <br> Apache2 <br> [[Sysadmin:DNS & DHCP | DNS]] <br> [[Sysadmin:DNS & DHCP | DHCP]]  <br><br> Backup to Indiana: etc, var, cluster
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-top:solid 5px #ffdb4d; border-bottom:solid 1px white; border-right:solid 5px #ffdb4d; font-size:120%;" | INDIANA
 
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|-
 
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| style="height:300px; width:150px; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-bottom:solid 5px #ffdb4d; border-right:solid 5px #ffdb4d;" | [[Indiana Storage Server|New Storage Server]]
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-top:solid 5px #ffdb4d; border-bottom:solid 1px white; border-right:solid 5px #ffdb4d; font-size:120%;" | DALI
 
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|-
 
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| style="height:300px; width:150px; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-bottom:solid 5px #ffdb4d; border-right:solid 5px #ffdb4d;" | Storage Server <br>[[Sysadmin:Gitlab | Gitlab]] <br> Backups <br> NginX <br><br> Backup to Indiana (/media/r10_vol/backups/): etc, var/opt/gitlab/backups
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-top:solid 5px #ff4d94; border-bottom:solid 1px white; border-right:solid 5px #ff4d94; font-size:120%;" | AL-SALAM
 
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|-
 
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| style="height:300px; width:150px; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-bottom:solid 5px #ff4d94; border-right:solid 5px #ff4d94;" | [[WebMO]] <br> [[Sysadmin:Software Modules | Software Modules]] <br> Apache2 <br><br> Backup to Indiana: etc, var
 
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|}
 
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−
{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-top:solid 5px #ff4d94; border-bottom:solid 1px white; border-right:solid 5px #ff4d94; font-size:120%;" | WHEDON
 
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|-
 
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| style="height:300px; width:150px; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-bottom:solid 5px #ff4d94; border-right:solid 5px #ff4d94;" | [[Sysadmin:Software Modules | Software Modules]] <br><br> Backups to Indiana: etc, var
 
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|}
 
−
 
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#39ad39; border-left:solid 5px #39ad39; border-top:solid 5px #39ad39; border-bottom:solid 1px white; border-right:solid 5px #39ad39; font-size:120%;" | LAYOUT
 
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|-
 
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| style="height:300px; width:150px; background-color:#39ad39; border-left:solid 5px #39ad39; border-bottom:solid 5px #39ad39; border-right:solid 5px #39ad39;" | [[Sysadmin:Jupyterhub Notebook Server | Jupyterhub Server]] <br> [[Sysadmin:Software Modules | Software Modules]] <br> NginX <br> Apache2 <br> [[WebMO]] <br><br> Backup to Indiana: etc, var
 
−
|}
 
−
 
 
−
{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px #0099cc; font-size:120%;" | BRONTE
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" |  [[Sysadmin:Software Modules | Software Modules]] <br><br> Backup to Indiana: etc, var, nbserver
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px #0099cc; font-size:120%;" | POLLOCK
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" |  [[Sysadmin:Software Modules | Software Modules]] <br> [[WebMO]] <br> NginX <br><br> Backup to Indiana: etc, var
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-top:solid 5px #ffdb4d; border-bottom:solid 1px white; border-right:solid 5px #ffdb4d; font-size:120%;" | KAHLO
 
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|-
 
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| style="height:300px; width:150px; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-bottom:solid 5px #ffdb4d; border-right:solid 5px #ffdb4d;" | Storage Server <br>Backups <br> NginX <br><br> Backup to Indiana: etc, var
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px #0099cc; font-size:120%;" | BIGFE
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" |  [[Sysadmin:Software Modules | Software Modules]] <br><br> Hosts BCCD related repositories and distributions.
 
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|}
 
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{| style="float:left; margin-right:2px;"
 
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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px #0099cc; font-size:120%;" | T-VOC
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" |  [[Sysadmin:Software Modules | Software Modules]]
 
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|}
 
  
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{| style="float:left; margin-right:2px;"
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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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| style="height:55px; width:150px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px #0099cc; font-size:120%;" | ELWOOD
 
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|-
 
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| style="height:300px; width:150px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc;" |  [[Sysadmin:Software Modules | Software Modules]] <br> <br> Used by BCCD to host www.bccd.net and www.littlefe.net. Will be deprecated when BCCD project offloads their sites onto cloud-based hosting platforms.
 
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|}
 
  
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{| style="float:left; margin-right:2px;"
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=== Compute (servers and clusters) ===
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| style="height:55px; width:150px; text-align:center; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-top:solid 5px #ff4d94; border-bottom:solid 1px white; border-right:solid 5px #ff4d94; font-size:120%;" | krasner
 
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|-
 
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| style="height:300px; width:150px; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-bottom:solid 5px #ff4d94; border-right:solid 5px #ff4d94;" | [[Docker]] platform on an old lovelace machine upgraded to have 16GB of RAM.
 
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|}
 
  
 +
We have CS and cluster machines.
  
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<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
+
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
  
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== Switches ==
+
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.
  
 +
==== Specialized resources ====
  
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{| style="float:left; margin-right:2px;"
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Specialized computing applications are supported on the following machines:
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| style="height:55px; width:175px; text-align:center; background-color:#0099cc; border-left:solid 5px #0099cc; border-top:solid 5px #0099cc; border-bottom:solid 1px white; border-right:solid 5px      #0099cc; font-size:120%;" | SG538SF02J
 
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|-
 
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| style="height:200px; width:175px; background-color:#0099cc; border-left:solid 5px #0099cc; border-bottom:solid 5px #0099cc; border-right:solid 5px #0099cc; font-size:80%;" |
 
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*Model: HP Procurve 3400cl
 
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*Ports: 24
 
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*Backplane bandwidth:
 
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**88 Gbps
 
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**64 million pps
 
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*Memory:
 
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**2MB packet buffer
 
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**16 MB dual flash
 
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**128 MB SDRAM
 
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*Cut-through switching: No
 
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*Unused as of May 12, 2017
 
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|}
 
  
−
{| style="float:left; margin-right:2px;"
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* [[Sysadmin:GPGPU|GPU’s for AI/ML/data science]]: layout cluster
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| style="height:55px; width:175px; text-align:center; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-top:solid 5px #ffdb4d; border-bottom:solid 1px white; border-right:solid 5px #ffdb4d; font-size:120%;" | CN63FP762S
+
* virtualization: smiley
−
|-
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* containers: bowie
−
| style="height:200px; width:175px; background-color:#ffdb4d; border-left:solid 5px #ffdb4d; border-bottom:solid 5px #ffdb4d; border-right:solid 5px #ffdb4d;font-size:80%;" |
 
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*Model: HP 2530-24G
 
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*Ports: 24
 
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*Switching Capacity:
 
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**56 Gbps
 
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**41.6 million pps
 
−
*Memory:
 
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**1.5 MB packet buffer
 
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**256 MB  flash
 
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**128 MB DDR3 DIMM
 
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*Cut-through switching: No
 
−
*Connected to Al-Salam as of May 12, 2017
 
−
|}
 
  
−
{| style="float:left; margin-right:2px;"
+
=== Network ===
−
| style="height:55px; width:175px; text-align:center; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-top:solid 5px #ff4d94; border-bottom:solid 1px white; border-right:solid 5px #ff4d94; font-size:120%;" | SG525SG025
 
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|-
 
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| style="height:200px; width:175px; background-color:#ff4d94; border-left:solid 5px #ff4d94; border-bottom:solid 5px #ff4d94; border-right:solid 5px #ff4d94;font-size:80%;" |
 
−
*Model: HP Procurve 3400cl
 
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*Ports: 24
 
−
*Backplane bandwidth:
 
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**88 Gbps
 
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**64 million pps
 
−
*Memory:
 
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**2MB packet buffer
 
−
**16 MB dual flash
 
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**128 MB SDRAM
 
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*Cut-through switching: No
 
−
*Connected to layout and whedon as of May 12, 2017
 
−
|}
 
  
−
{| style="float:left; margin-right:2px;"
+
We have two network fabrics linking the machines together. There are three subdomains.
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| style="height:55px; width:175px; text-align:center; background-color:#39ad39; border-left:solid 5px #39ad39; border-top:solid 5px #39ad39; border-bottom:solid 1px white; border-right:solid 5px #39ad39; font-size:120%;" | Netgear JGS524
 
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|-
 
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| style="height:200px; width:175px; background-color:#39ad39; border-left:solid 5px #39ad39; border-bottom:solid 5px #39ad39; border-right:solid 5px #39ad39;font-size:80%;" |
 
−
*Current cluster head-node
 
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*Unmanaged (no console/configuration)
 
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*Ports: 24
 
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*Switching bandwidth:
 
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**48 Gbps
 
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**1.5 million pps
 
−
*Memory:
 
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**2MB packet buffer
 
−
*Cut-through switching: No
 
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*Connected to Al-Salam, Hopper, Pollock, Nagios, Dali, Kahlo, Bronte as of May 12, 2017
 
−
|}
 
  
−
{| style="float:left; margin-right:2px;"
+
==== 10 Gb ====
−
| style="height:55px; width:175px; text-align:center; background-color:#E77471; border-left:solid 5px #E77471; border-top:solid 5px #E77471; border-bottom:solid 1px white; border-right:solid 5px #E77471; font-size:120%;" | cs-main
 
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|-
 
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| style="height:200px; width:175px; background-color:#E77471; border-left:solid 5px #E77471; border-bottom:solid 5px #E77471; border-right:solid 5px #E77471;font-size:80%;" |
 
−
*Model: HP 5920AF-24XG
 
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*Ports: 24
 
−
*Backplane bandwidth:
 
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**480 Gbps
 
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**367 million pps
 
−
*Memory:
 
−
**3.6 GB packet buffer
 
−
**256 MB dual flash
 
−
**2 GB SDRAM
 
−
*Cut-through switching: Yes
 
−
*IP Address: 159.28.31.66
 
−
*Connected to layout, kahlo, and dali as of May 12, 2017
 
−
|}
 
  
−
{| style="float:left; margin-right:2px;"
+
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.
−
| style="height:55px; width:175px; text-align:center; background-color:#ADDFFF; border-left:solid 5px #ADDFFF; border-top:solid 5px #ADDFFF; border-bottom:solid 1px white; border-right:solid 5px #ADDFFF; font-size:120%;" | 5500denniscs-sw1
 
−
|-
 
−
| style="height:200px; width:175px; background-color:#ADDFFF; border-left:solid 5px #ADDFFF; border-bottom:solid 5px #ADDFFF; border-right:solid 5px #ADDFFF;font-size:80%;" |
 
−
*Model: HP 5500 JG542A
 
−
*Ports: 24
 
−
*Backplane bandwidth:
 
−
**224 Gbps
 
−
**166.6 million pps
 
−
*Memory:
 
−
**6 MB packet buffer
 
−
**512 MB dual flash
 
−
**1 GB SDRAM
 
−
*Cut-through switching: No
 
−
*IP Address: 159.28.31.67
 
−
*Connected to Babbage, Bowie, Nagios, and the cluster's netgear switch (via port 14) as of May 12, 2017
 
−
|}
 
  
−
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
+
==== 1 Gb (cluster, cs) ====
−
 
 
−
= Systems Administration Documentation =
 
−
For old documentation, see: [[Sysadmin:Old | Old Wiki Information]]
 
  
−
{|
+
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.
−
|- valign:"top"
 
−
|
 
−
<div style="border:10px solid #E0EAF8; padding:5px; width:230px; height:500px">
 
−
<div style="background-color:#CEDEF4; padding:5px;">
 
  
−
=== Admin Tasks ===
+
Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
−
</div>
 
−
* [[Sysadmin:Monitoring | Monitoring ]]
 
−
* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 
−
* [[Sysadmin:User Management | User Management]]
 
−
* [[Modules | Installing software under modules ]]
 
−
* [[Sysadmin:Backup|Backup]]
 
−
* [[Sysadmin:Contacting all users|Contacting all users]]
 
−
* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin to the fold]]
 
−
* [[Sysadmin:AddComputer|Add a computer]]
 
−
* [[Sysadmin:Setting up Lovelace Lab Machines | Setting up Lovelace Lab Machines]]
 
−
* [[Reset password]]
 
−
* [[Senior projects]]
 
−
* [[ShutdownProcedure| Shutdown and Boot up]]
 
−
* [[Sysadmin:ImportantInfo:SSLcerts| Generating SSL Certificates]]
 
−
* [[Password managers]]
 
−
* [[Server safety]]
 
  
 +
==== Intra-cluster fabrics ====
  
−
<!-- This has to stay as part of the formatting -->
+
The layout cluster has an Infiniband infrastructure. Whedon has only a 1Gb infrastructure.
−
</div>
 
−
| style="float:left;" |
 
−
|
 
−
<div style="border:10px solid #FFDFFF; padding:5px; width:230px; height:500px;">
 
−
<div style="background-color:#FFCEFF; padding:5px;">
 
  
−
=== Services ===
+
=== Power ===
−
</div>
 
−
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]]
 
−
* [[Sysadmin:Services:Apache2|Apache2]]
 
−
* [[Sysadmin:Services:Databases|Databases]]
 
−
* [[Sysadmin:DNS & DHCP|DNS and DHCP]]
 
−
* [[Sysadmin:Services:Virtualization | Virtualization]]
 
−
* [[Sysadmin:Services:XenServerSetup | Xen Server]]
 
  
−
|}
+
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.
  
−
== Current Projects ==
+
=== HVAC ===
−
This is the list we will work from in addition to service requests.
 
  
−
Some important procedural pages:
+
HVAC systems are static and are largely managed by Facilities.
−
* Use the [[Sysadmin/New_Task_Template|Sysadmin task template]] if you're starting a new project. Copy and paste the wiki source page and populate the basic fields.
 
−
* This is a new way of [[Sysadmin/Task_Process|task processing]]. It's subject to change.
 
−
* You can see our [[:Category:Open Tasks|Open Tasks here]].
 
−
* We will also start filling up the [[:Category:Closed Tasks|Closed Tasks category]].
 
  
−
Please update specific projects at their own page.
+
[[Topology|See full topology diagrams here.]]
−
* [[Documentation]] - a meta-project - please click here to update projects you've worked on but haven't documented yet
 
−
* [[Web logins]]
 
−
* [[Password management]]
 
−
* [[Docker and WebODM on Bronte]]
 
−
* [[Fix shinken server access]]
 
−
* Backup in Lilly basement
 
−
* [[Backup on all machines]] - includes backup.cs.e.e (indiana?)
 
−
* [[Post shutdown]]
 
−
* power map additions and updates - update the power map and get as much of our power data (how much we use, how much we could theoretically be using, etc.) all together
 
−
* clean up system variables, e.g. verifying that all our systems have Python 2 as a default not Python 3, using Charlie’s earlier email about cexecs as a starting point (in your inbox or the mailing list, search for “A bit of cleaning on the cluster side”)
 
−
* install and configure RT
 
−
* install and configure bioinformatics software (a focus for Laurence but one that others may want to look at) - includes making sure qsub works on both bronte and pollock
 
  
−
Smaller projects
+
[[Sysadmin:Layers of abstraction for filesystems|A word about what's happening between files and the drives they live on.]]
−
* update our DNS files (and thus our store of reserved IP addresses) based on which machines are currently in use (a good chance to learn DNS, both generally and how we run it here) - cf. [[Verify Lovelace DNS]]
 
−
* [[Layout Layout]]
 
−
* Fix man pages (on each machine, check that man pages come up as expected - e.g. run `man ls` - and fix them if not)
 
−
* Double-check our time servers.
 
−
* Fix Bronte's IP address problem.
 
−
** see nfstab; check the IP backups on hopper and dali (sysconfig,networks,scripts in the backup dir - also check ~charliep for a capture of ifconfig's eth*)
 
−
** take notes for future CentOS upgrades
 

Revision as of 10:40, 5 April 2021

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

Common Tasks

Services

For old documentation, see: Old Wiki Information

Machines and Brief Descriptions of Services

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

Compute (servers and clusters)

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.

Specialized resources

Specialized computing applications are supported on the following machines:

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. Whedon 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.

Retrieved from "https://wiki.cs.earlham.edu/index.php?title=Sysadmin&oldid=17832"