In-place upgrade workflow

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Click here to open diagram of the phases

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Facts Collection

• Operating System Version Detection, IP, Hostname, RPMs, Services, Augeas run

Checks

• Preupgrade Checks

• Inhibitors - Blockers, Shared Objects, Binaries, Languages, Packages, Load Balance Support, User Management, Version Control Systems, FreeRADIUS, IPA Bind Dyndb LDAP, SSSD, NTP, OpenLDAP, YPSERV, Network, Databases, SELinux, Storage, System

• Services

• HTTPD, OpenSSH, Postfix, SQUID, DoveCot, Bind9 Configuration

• Backup

• Untracked Files

• Others

• RSYSLOG

Report

• Provide user with the result of the checks
• Let user interactively decide on multiple-choice solution for specific upgrade issues

Attach package repositories

• Make sure the repositories of the new system are available

Planning

• RPM Install transaction (feasibility checks)

Download

• Download of all things needed (RPMs, Kernel images, Anaconda image (very big maybe), etc.)

Upgrade RamDisk Preparation

• Preparation of initial ramdisk (if required)
• Setup bootloaderGrub

Upgrade RamDisk Start (Actual reboot)

• Reboot into the next system therefore not a real step, however the before and post parts are interesting to have for hooking

Network

• Bring up the network

Storage

• Mount all storage points

Late Tests

• Tests that need to be executed later

Preparation

• YUM Configurations
• Backup not upgradable configurations (No Verify Configs)

RPM Upgrade

• Upgrade RPMs
• Check all files are installed (troubles with handling dirs/symlinks), includes reinstallation of affected packages

Application Upgrade

• Application of changes on configuration files, move various directores, etc.

Third Party Applications

• A place for custom actors for third party applications to be upgraded

Finalization

• Plan SELinux relabeling
• Labels Bootloader settings

Reboot

• Reboot into the new system

First Boot