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atomic upgrade

By atomic upgrade, we mean:

  • Put Tiki in read-only
  • Make an exact copy
  • Upgrade the copy
  • Swap the two (rename or symlink directories)
    • No downtime
    • Easily rollback


This might be an option Tiki-Manager can automate.

Supposing all sites are stored on /data/www , a new site having the domain tiki.vbox will be stored at /data/www/tiki.vbox . The folder structure for this site will be

/data/www/tiki.vbox
├── conf
│   ├── local.ini
│   └── local.php
├── html -> releases/20200227
├── logs
│   ├── httpd-access.log
│   └── httpd-error.log
└── releases
│   └── 20200227
│       └── db
│           └── local.php -> ../../../conf/local.php
└── data
    ├── img
    ├── modules
    └── temp

The conf  folder


In this folder should exists at least the local.php file, that contains credentials for database access. Optionally, it might contains local.ini file, that contains overrides for tiki preferences.

The logs  folder


Contains any log files. Usually, it holds webserver logs in it, but it might be a good idea put Tiki logs there.

The releases  folder


Contains one or more Tiki installation. Each subfolder is a Tiki installation and the subfolder name is related to Tiki version or to the installation date.


The html is the document root for the webserver. It should point to the latest Tiki installation on releases folder.

The data  folder


Should have in folders Tiki needs to work properly.

  • vendor
  • temp
  • img/wiki
  • img/wiki_up

Secrets to make it works


1) You need to symlink local.php from db/local.php to the one in the conf folder

cd /data/www/tiki.vbox
ln -rs conf/local.php html/db/local.php


2) Tiki installations should have composer dependencies installed

3) Tiki installations should have permissions correctly set.

4) The data folder should be linked into Tiki structure

cd /data/www/tiki.vbox/

# data files
mkdir -p data/{img,modules}
mv html/img/trackers data/img
mv html/img/wiki data/img
mv html/img/wiki_up data/img
mv html/storage data/
ln -rTsf data/img/trackers   html/img/trackers
ln -rTsf data/img/wiki       html/img/wiki
ln -rTsf data/img/wiki_up    html/img/wiki_up
ln -rTsf data/storage   html/storage

# custom packages
mv html/vendor data/vendor
[ -f "html/composer.json" ] && mv html/composer.json data/composer.json
ln -rTsf data/vendor    html/vendor
ln -rsf data/composer.json html/composer.json

# temp files
mv html/modules/cache data/modules
mv html/temp data/
ln -rTsf data/modules/cache  html/modules/cache
ln -rTsf data/temp           html/temp

Steps to update tiki


1) Copy the new tiki installation to releases folder
2) Ensure composer deps are installed
3) Ensure permissions are correctly set
4) Ensure the +- /data/www/tiki.vbox/html/db/local.php +- points to /data/www/tiki.vbox/conf/local.php
5) Make html symlink point to the new tiki installation

ln -Tsf releases/new  html

Steps to rollback


Point html symlink to previous selected Tiki installation.

ln -Tsf releases/old  html

Concernings

  • Tiki writes a lot of files in a lot of different folders. It is possible there is more folders to symlink
  • The amount of necessary links make it complex to automate
  • Keeping many installation on releases folder will take a lot of disk space
  • On Windows might not be possible this approach
  • Custom translations is not covered and will be lost in a upgrade

References



We want this for Tiki Manager and for Docker

Keywords

The following is a list of keywords that should serve as hubs for navigation within the Tiki development and should correspond to documentation keywords.

Each feature in Tiki has a wiki page which regroups all the bugs, requests for enhancements, etc. It is somewhat a form of wiki-based project management. You can also express your interest in a feature by adding it to your profile. You can also try out the Dynamic filter.

Accessibility (WAI & 508)
Accounting
Administration
Ajax
Articles & Submissions
Backlinks
Banner
Batch
BigBlueButton audio/video/chat/screensharing
Blog
Bookmark
Browser Compatibility
Calendar
Category
Chat
Comment
Communication Center
Consistency
Contacts Address book
Contact us
Content template
Contribution
Cookie
Copyright
Credits
Custom Home (and Group Home Page)
Database MySQL - MyISAM
Database MySQL - InnoDB
Date and Time
Debugger Console
Diagram
Directory (of hyperlinks)
Documentation link from Tiki to doc.tiki.org (Help System)
Docs
DogFood
Draw -superseded by Diagram
Dynamic Content
Preferences
Dynamic Variable
External Authentication
FAQ
Featured links
Feeds (RSS)
File Gallery
Forum
Friendship Network (Community)
Gantt
Group
Groupmail
Help
History
Hotword
HTML Page
i18n (Multilingual, l10n, Babelfish)
Image Gallery
Import-Export
Install
Integrator
Interoperability
Inter-User Messages
InterTiki
jQuery
Kaltura video management
Karma
Live Support
Logs (system & action)
Lost edit protection
Mail-in
Map
Menu
Meta Tag
Missing features
Visual Mapping
Mobile
Mods
Modules
MultiTiki
MyTiki
Newsletter
Notepad
OS independence (Non-Linux, Windows/IIS, Mac, BSD)
Organic Groups (Self-managed Teams)
Packages
Payment
PDF
Performance Speed / Load / Compression / Cache
Permission
Poll
Profiles
Quiz
Rating
Realname
Report
Revision Approval
Scheduler
Score
Search engine optimization (SEO)
Search
Security
Semantic links
Share
Shopping Cart
Shoutbox
Site Identity
Slideshow
Smarty Template
Social Networking
Spam protection (Anti-bot CATPCHA)
Spellcheck
Spreadsheet
Staging and Approval
Stats
Survey
Syntax Highlighter (Codemirror)
Tablesorter
Tags
Task
Tell a Friend
Terms and Conditions
Theme
TikiTests
Timesheet
Token Access
Toolbar (Quicktags)
Tours
Trackers
TRIM
User Administration
User Files
User Menu
Watch
Webmail and Groupmail
WebServices
Wiki History, page rename, etc
Wiki plugins extends basic syntax
Wiki syntax text area, parser, etc
Wiki structure (book and table of content)
Workspace and perspectives
WYSIWTSN
WYSIWYCA
WYSIWYG
XMLRPC
XMPP




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