sysadmin/UpgradingDAQ.md

+# Upgrading a DAQ server
+
+This is a record of steps taken to upgrade DAQ leg 0 of DTS1 
+from debian 10 to debian 11. 
+
+
+1. backup up ```/etc/{fstab,facter,network,advligorts,ssh}```
+1. Run debian setup.  
+    a. super micro ukvm tool
+    b. virtual CDSROM
+    c. manual disk setup
+    d. reuse existing partions on disk.  
+        1. assign mount points to partitions
+        2. format the disks to wipe data.
+    e. install base system and ssh server only
+1. restore ssh keys
+1. delete ssh keys from backup
+1. log in through ssh
+1. grub-install /dev/sdb
+1. install puppet (taken from git.ligo.org/cds/admin/ligo_cds_frontend wiki)
+apt install git
+
+```
+cd /root
+apt-get update
+apt-get install wget
+wget https://apt.puppetlabs.com/puppet6-release-buster.deb
+apt-get install ./puppet6-release-buster.deb
+
+apt-get update
+apt-get install puppet-agent
+```
+
+1. set up puppet "facts" by restoring /etc/facter. Contents should look like:
+
+```
+ifo:
+  name: dts1
+  ifo: X2
+  site: TST
+  bootserver: x2vmboot2
+```
+
+1. setup puppet module
+ 
+```
+mkdir -p /root/puppet/modules
+cd /root/puppet/modules
+git clone https://git.ligo.org/cds/admin/ligo_cds_frontend.git
+``
+
+1. cd into the module and switch to ```abandon_realtime_kernel``` branch
+
+1. change data/<SITE>/<IFO>/<system>/<daqhostname>.yaml to use bullseye
+
+1. add /etc/apt/sources.list.d/restricted.list
+
+1. run puppet with ( might have to run twice )
+
+```
+/opt/puppetlabs/bin/puppet apply --modulepath /root/puppet/modules /root/puppet/modules/ligo_cds_frontend/nodes/daqd_server.pp
+```
+
+1. set password for controls
+
+1. install sudo
+
+1. (DC ONLY) Restore /etc/network/interfaces from backup.
+
+1. reboot