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debian:upgradepathtemplate [2025/04/29 08:12]
193.70.81.110 old revision restored (2024/05/06 09:47) 		debian:upgradepathtemplate [2025/04/29 11:15] (current)
195.191.219.130 old revision restored (2024/05/15 01:58)
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 I will normally create a complete system clone and use this template to work out the entire correct and functional path for the production system in question. I will normally create a complete system clone and use this template to work out the entire correct and functional path for the production system in question.
- 
-Debian Release upgrade paths: 
- 
-  Jessie -> Buster -> Bullseye 
-  Stretch -> Buster -> Bullseye 
-  Buster -> Bullseye 
  
 ===== 1. Preparing for the upgrade ===== ===== 1. Preparing for the upgrade =====
  
  
-==== 1.1. Back up any data or configuration information ==== +1.1. Back up any data or configuration information 
- +1.2. Inform users in advance 
- Sometimes you will need certain server information at your fingertips during possible failures of the server. Figure out what you may need and make sure you have it local and ready. +1.3. Prepare for downtime on services 
-==== 1.2. Inform users in advance ==== +            Set maintainance window for upgrade with buffer 
- +1.4. Prepare for recovery 
-=== 1.2.1 - Who and How should be informed === +            Verify the recoverability of system from backup image 
- +1.5. Prepare a safe environment for the upgrade 
- Ensure the maintainance window you are planning is OK with all involved. +            Local terminal or SSH access 
- +1.6. Develop tests for section 3.3 that will ensure correct execution of needed tasks 
-=== 1.2.2 - Notify 1 Day prior to planned upgrade === +            i.e.: 
- +                a. Web server delivers correctly 
-=== 1.2.3 - Notify 2 Hours prior to beginn of upgrade === +                b. php scripts execute correctly 
-==== 1.3. Prepare for downtime on services ==== +                c. DB runs correctly 
- +                d. mail works
- Set maintainance window for upgrade with buffer +
- +
-==== 1.4. Prepare for recovery ==== +
- +
- Verify the recoverability of system from backup image +
- +
- This is the perfect time to assess the Backup solution of the Company, when not previously done, if you are hired to ensure the reliability of the infrastructure. +
-==== 1.5. Prepare a safe environment for the upgrade ==== +
- +
- Local terminal or SSH access +
- +
-==== 1.6. Develop tests for section 3.3 that will ensure correct execution of needed tasks ==== +
- +
- i.e.: +
-  a. Web server delivers correctly +
-  b. php scripts execute correctly +
-  c. DB runs correctly +
-  d. mail works+
  
 ===== 2. Checking system status ===== ===== 2. Checking system status =====
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     # apt-forktracer | sort     # apt-forktracer | sort
  
-==== 2.1. Review actions pending in package manager ==== +2.1. Review actions pending in package manager 
- +            # aptitude 
-    # aptitude +            Select GO and review 
-  Select GO and review +2.2. Disabling APT pinning 
- +            check /etc/apt/preferences & /etc/apt/preferences.d/ for entries 
-==== 2.2. Disabling APT pinning ==== +2.3. Checking packages status 
- +            # dpkg --audit 
- check /etc/apt/preferences & /etc/apt/preferences.d/ for entries +            # aptitude search "~ahold" 
- +            # dpkg --get-selections | grep 'hold$'
-==== 2.3. Checking packages status ==== +
- +
-  # dpkg --audit +
-  # aptitude search "~ahold" +
-  # dpkg --get-selections | grep 'hold$' +
- +
- To remove a hold on a package: +
-  echo package_name install | dpkg --set-selections +
- +
-==== 2.4. Remove proposed-updates section if present in /etc/apt/sources.list ==== +
- +
-==== 2.5. Verify Unofficial sources are available for target Debian version ====+
  
 +         To remove a hold on a package: echo package_name install | dpkg --set-selections
 +2.4. Remove proposed-updates section if present in /etc/apt/sources.list
 +2.5. Verify Unofficial sources are available for target Debian version
  
 ===== 3. Upgrading current version ===== ===== 3. Upgrading current version =====
  
  
-==== 3.1. Update current installation ==== +3.1. Update current installation 
- +            # sudo apt update 
-  # sudo apt update +3.2. Upgrade current installation 
- +            # sudo apt upgrade 
-==== 3.2. Upgrade current installation ==== +3.3. Check functionality 
- +            Verify all services required of current host is functioning correctly 
- Before executing the below command it should be approximately 2 Hours after informing everyone from Section 1.2 above.  +3.4. Upgrade current distribution 
- +            # sudo apt dist-upgrade 
-  # sudo apt upgrade +3.5. Check functionality 
- +            see 3.3 above
-==== 3.3. Check functionality ==== +
- +
- Verify all services required of current host is functioning correctly +
- +
-==== 3.4. Upgrade current distribution ==== +
- +
-  # sudo apt dist-upgrade +
- +
-==== 3.5. Check functionality ==== +
- +
- see 3.3 above+
  
 ===== 4. Preparing sources for APT ===== ===== 4. Preparing sources for APT =====
  
  
-==== 4.1. Adding APT Internet sources ==== +4.1. Adding APT Internet sources 
- +            # sudo sed -i 's/CURRENT_RELEASE/TARGET_RELEASE/g' /etc/apt/sources.list 
-  # sudo sed -i 's/CURRENT_RELEASE/TARGET_RELEASE/g' /etc/apt/sources.list +            # sudo sed -i 's/CURRENT_RELEASE/TARGET_RELEASE/g' /etc/apt/sources.list.d/* 
-  # sudo sed -i 's/CURRENT_RELEASE/TARGET_RELEASE/g' /etc/apt/sources.list.d/* +4.2. Adding APT sources for a local mirror 
- +            Only required for special in-house software 
-==== 4.2. Adding APT sources for a local mirror ==== +4.3. Adding APT sources from optical media 
- +            Only required for special 3rd party delivered software
- Only required for special in-house software +
- +
-==== 4.3. Adding APT sources from optical media ==== +
- +
- Only required for special 3rd party delivered software+
  
 ===== 5. Upgrading packages ===== ===== 5. Upgrading packages =====
  
  
- Ensure all partition mountpoints are mounted read-write+    Ensure all partition mountpoints are mounted read-write 
 +        # mount -o remount,rw /mountpoint
  
-  # mount -o remount,rw /mountpoint +5.1. Recording the session 
- +            # script -t 2>~/upgrade-TARGET_RELEASEstep.time -a ~/upgrade-TARGET_RELEASEstep.script 
-==== 5.1. Recording the session ==== +         To replay session use scriptreplay 
- +            # scriptreplay ~/upgrade-TARGET_RELEASE.time ~/upgrade-TARGET_RELEASE.script 
-  # script -t 2>~/upgrade-TARGET_RELEASEstep.time -a ~/upgrade-TARGET_RELEASEstep.script +5.2. Updating the package list 
- +            # apt-get update 
- To replay session use scriptreplay +5.3. Make sure you have sufficient space for the upgrade 
-  # scriptreplay ~/upgrade-TARGET_RELEASE.time ~/upgrade-TARGET_RELEASE.script +            # apt-get -o APT::Get::Trivial-Only=true dist-upgrade 
- +5.4. Minimal system upgrade 
-==== 5.2. Updating the package list ==== +            # apt-get upgrade 
- +5.5. Check functionality 
-  # apt-get update +            See 3.3 above 
- +5.6. Upgrading the system 
-==== 5.3. Make sure you have sufficient space for the upgrade ==== +            # apt-get dist-upgrade 
- +5.7. Check functionality 
-  # apt-get -o APT::Get::Trivial-Only=true dist-upgrade +            See 3.3 above
- +
-==== 5.4. Minimal system upgrade ==== +
- +
-  # apt-get upgrade +
- +
-==== 5.5. Check functionality ==== +
- +
- See 3.3 above +
- +
-==== 5.6. Upgrading the system ==== +
- +
-  # apt-get dist-upgrade +
- +
-==== 5.7. Check functionality ==== +
- +
- See 3.3 above+
  
 ===== 6. Possible issues during upgrade ===== ===== 6. Possible issues during upgrade =====
  
  
-==== 6.1. Dist-upgrade fails with “Could not perform immediate configuration” ==== +6.1. Dist-upgrade fails with “Could not perform immediate configuration” 
- +            # apt-get dist-upgrade -o APT::Immediate-Configure=0 
-  # apt-get dist-upgrade -o APT::Immediate-Configure=0 +6.2. Expected removals 
- +6.3. Conflicts or Pre-Depends loops 
-==== 6.2. Expected removals ==== +            use -o APT::Force-LoopBreak=1 with apt-get 
- +         or 
-==== 6.3. Conflicts or Pre-Depends loops ==== +            # dpkg --remove package_name 
- +        or 
- use -o APT::Force-LoopBreak=1 with apt-get +            # apt-get -f install 
- or +            # dpkg --configure --pending 
-  # dpkg --remove package_name +        or 
- or +            # dpkg --install /path/to/package_name.deb 
-  # apt-get -f install +6.4. File conflicts 
-  # dpkg --configure --pending +            # dpkg -r --force-depends package_name 
- or +6.5. Configuration changes 
-  # dpkg --install /path/to/package_name.deb +            Usually answer "YES" to files in /etc/init.d directory or /etc/manpath.config 
- +6.6. Change of session to console 
-==== 6.4. File conflicts ==== +            Ctrl+Alt+F1 should recover the terminal window
- +
-  # dpkg -r --force-depends package_name +
- +
-==== 6.5. Configuration changes ==== +
- +
- Usually answer "YES" to files in /etc/init.d directory or /etc/manpath.config +
- +
-==== 6.6. Change of session to console ==== +
- +
- Ctrl+Alt+F1 should recover the terminal window+
  
 ===== 7. Upgrading kernel and related packages ===== ===== 7. Upgrading kernel and related packages =====
  
  
-==== 7.1. Install any needed kernel metapackage ==== +7.1. Install any needed kernel metapackage 
- +            Check for meta package 
- Check for meta package +                # dpkg -l "linux-image*" | grep ^ii | grep -i meta 
- +            if none are installed check which ones are available 
-  # dpkg -l "linux-image*" | grep ^ii | grep -i meta +                # apt-cache search linux-image- | grep -i meta | grep -v transition 
- +            select correct one based on value returned by running "uname -r" eg. kernel “2.6.32-5-amd64” 
- if none are installed check which ones are available +                # apt-cache show linux-image-amd64
- +
-  # apt-cache search linux-image- | grep -i meta | grep -v transition +
- +
- select correct one based on value returned by running "uname -r" eg. kernel “2.6.32-5-amd64” +
- +
-  # apt-cache show linux-image-amd64+
  
 ===== 8. Preparing for the next release ===== ===== 8. Preparing for the next release =====
  
  
-==== 8.1. Purging removed packages ==== +8.1. Purging removed packages 
- +            Remove redundant or obsolete packages. see 5.3 above 
- Remove redundant or obsolete packages. see 5.3 above +            get list of removed packages 
- +                # dpkg -l | awk '/^rc/ { print $2 }' 
- get list of removed packages +            remove using 
- +                # apt-get purge $(dpkg -l | awk '/^rc/ { print $2 }') 
-  # dpkg -l | awk '/^rc/ { print $2 }' +            or use 
- +                # aptitude search '~c' 
- remove using +                # aptitude purge '~c'
- +
-  # apt-get purge $(dpkg -l | awk '/^rc/ { print $2 }') +
- +
- or use +
- +
-  # aptitude search '~c' +
-  # aptitude purge '~c'+
  
 ===== 9. Obsolete packages ===== ===== 9. Obsolete packages =====
  
  
-==== 9.1. Dummy packages ==== +9.1. Dummy packages
debian/upgradepathtemplate.txt · Last modified: 2025/04/29 11:15 by 195.191.219.130

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