2-common/tasks/packages.yml: python3-venv for U20.04 {calibre-web, jupyterhub, lokole}

roles/2-common/tasks/packages.yml

@@ -4,7 +4,7 @@
 - name: '2021-07-27: SEE ALSO 4-5 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/network.yml'
   meta: noop
 
-- name: "Install 20 common packages: acpid, avahi-daemon, bzip2, curl, gawk, htop, i2c-tools, libnss-mdns, logrotate, mlocate, net-tools, pandoc, pastebinit, rsync, sqlite3, tar, unzip, usbutils, wget, wpasupplicant"
+- name: "Install 21 common packages: acpid, avahi-daemon, bzip2, curl, gawk, htop, i2c-tools, libnss-mdns, logrotate, mlocate, net-tools, pandoc, pastebinit, python3-venv, rsync, sqlite3, tar, unzip, usbutils, wget, wpasupplicant"
   package:
     name:
       - acpid              # Daemon for ACPI (power mgmt) events
@@ -30,6 +30,7 @@
       #- openssh-server    # ssh (Raspbian) or openssh-server (other OS's) already installed by 1-prep's roles/sshd/tasks/main.yml
       - pandoc             # For /usr/bin/iiab-refresh-wiki-docs
       - pastebinit         # For /usr/bin/iiab-diagnostics
+      - python3-venv       # 2021-07-29: Unlike Debian 11, this is required on Ubuntu 20.04 (where packages like python3-pymysql -> python3 don't drag in 'python3-venv') -- for roles like {calibre-web, jupyterhub, lokole} -- whereas roles/kalite uses (virtual) package 'virtualenv' for Python 2
       - rsync
       #- screen            # Installed by 1-prep's roles/iiab-admin/tasks/access.yml
       - sqlite3

roles/jupyterhub/tasks/install.yml

@@ -41,7 +41,7 @@
     virtualenv: "{{ jupyterhub_venv }}"    # /opt/iiab/jupyterhub
     virtualenv_site_packages: no
     virtualenv_command: python3 -m venv "{{ jupyterhub_venv }}"
-    virtualenv_python: python3
+    #virtualenv_python: python3    # 2021-07-29: Was needed when above line was 'virtualenv_command: virtualenv' (generally for Python 2)
     extra_args: "--no-cache-dir"
   when: internet_available