Installation | Topics | Beyond Lino

Run dist-upgrade on a Lino server

Basic recipe

Before running apt dist-upgrade on Lino server, you must make sure to have (1) a snapshot of each production site and (2) a requirements.txt file for each virtualenv on this server. On a Lino server there is at least one master virtualenv, usually named master and located in /usr/local/lino/shared/env/master.

  • Make sure that you know which production sites are installed on the server and which virtualenv each of them uses. Here are some hints:

    • How to find out which virtualenvs are installed on a server:

      $ find /usr/local -type l -name python

    • How to find out which Lino sites are installed on a server:

      $ ls /usr/local/lino
$ ls /etc/nginx/sites-enabled
$ ls /etc/supervisor/conf.d

  • Make a requirements.txt of the master virtualenv:

    $ sudo su
# cd /usr/local/lino/shared/env
# . master/bin/activate
# pip freeze > requirements.txt

  • Stop the supervisor service:

    $ sudo systemctl stop supervisor

  • Run make_snapshot.sh for every production site:

    $ go XXXX
$ ./make_snapshot.sh

  • Run apt dist-upgrade

  • After running apt dist-upgrade, rebuild every virtualenv as described in the sections below that applies to your situation.

  • Restart the supervisor service:

    $ sudo systemctl start supervisor

Rebuild virtualenvs on a demo server

  1. Deactivate any virtualenv and change directory into the master virtualenv’s parent directory:

    $ deactivate
$ cd /usr/local/lino/shared/env

  2. Rename the old virtualenv and create a new one of same name:

    $ mv master master1
$ python -m venv master

  3. Copy the pull.sh from old to new env:

    $ cp master1/bin/pull.sh master/bin/pull.sh

  4. Move the repositories and static_root directories from old to new env:

    $ mv master1/repositories master/
$ mv master1/static_root master/

  5. Activate the new virtualenv:

    $ . master/bin/activate

  6. Stop the supervisor service:

    $ sudo systemctl stop supervisor

  7. Run the pull script:

    $ pull.sh

  8. Restart the supervisor service:

    $ sudo systemctl start supervisor

Rebuild virtualenvs on a production server

Reinstall the master virtualenv with getlino:

$ sudo su
# deactivate
# cd /usr/local/lino/shared/env
# mv XXXX XXXX.old
# python3 -m venv XXXX
# . XXXX/bin/activate
# pip install getlino
# Ctrl+D

On each production site, use the requirements.txt file that was part of the snapshot:

$ go XXXX
$ deactivate
$ mv env env.old
$ python3 -m venv env
$ a
$ pip install -r snapshot/requirements.txt
$ pm buildcache

Cheat sheet

Here are some more little howtos that might be useful in certain situations.

How to find out which Lino sites are installed on a server if you aren’t sure whether all Lino sites have been installed under the standard location /usr/local/lino:

$ grep server_name /etc/nginx/sites-enabled/*
$ grep "\[fcgi-program:" /etc/supervisor/conf.d/*

How to see the master virtualenv of a Lino server:

$ sudo -i which python

How to see the currently active virtualenv:

echo $VIRTUAL_ENV

How to list all Lino sites that use the currently active virtualenv:

$ find -L /usr/local/lino -samefile $VIRTUAL_ENV

(In other words, you list the directories that are symbolic links to the currently active virtualenv.)

How to see the MySQL databases and users:

$ sudo mysql -e "show databases;"
$ sudo mysql -e "select host, user from mysql.user;"

Show information about the currently active virtualenv:

$ cat $VIRTUAL_ENV/pyvenv.cfg

The output should look similar to the following below:

home = /usr/local/lino/shared/env/master/bin
include-system-site-packages = true
version = 3.8.3

Take a note of the major and minor part of the version number (in our case: 3.8)