apt: fix unattended upgrads and apt download speed

roles/apt/files/unattended-upgrades.conf

@@ -19,50 +19,72 @@
 // Within lines unattended-upgrades allows 2 macros whose values are
 // derived from /etc/debian_version:
 //   ${distro_id}            Installed origin.
-//   ${distro_codename}      Installed codename (eg, "jessie")
+//   ${distro_codename}      Installed codename (eg, "buster")
 Unattended-Upgrade::Origins-Pattern {
         // Codename based matching:
         // This will follow the migration of a release through different
         // archives (e.g. from testing to stable and later oldstable).
-//      "o=Debian,n=jessie";
+        // Software will be the latest available for the named release,
-//      "o=Debian,n=jessie-updates";
+        // but the Debian release itself will not be automatically upgraded.
-//      "o=Debian,n=jessie-proposed-updates";
+        "origin=Debian,codename=${distro_codename}-updates";
-//      "o=Debian,n=jessie,l=Debian-Security";
+//      "origin=Debian,codename=${distro_codename}-proposed-updates";
+        "origin=Debian,codename=${distro_codename},label=Debian";
+        "origin=Debian,codename=${distro_codename},label=Debian-Security";
 
         // Archive or Suite based matching:
         // Note that this will silently match a different release after
         // migration to the specified archive (e.g. testing becomes the
         // new stable).
-        "origin=Debian,codename=${distro_codename}";
+//      "o=Debian,a=stable";
-        "origin=Debian,codename=${distro_codename}-updates";
+//      "o=Debian,a=stable-updates";
-        "origin=Debian,codename=${distro_codename}-proposed-updates";
+//      "o=Debian,a=proposed-updates";
-        "origin=Debian,codename=${distro_codename},label=Debian-Security";
+//      "o=Debian Backports,a=${distro_codename}-backports,l=Debian Backports";
 };
 
-// List of packages to not update (regexp are supported)
+// Python regular expressions, matching packages to exclude from upgrading
 Unattended-Upgrade::Package-Blacklist {
-//	"vim";
+    // The following matches all packages starting with linux-
-//	"libc6";
+//  "linux-";
-//	"libc6-dev";
+
-//	"libc6-i686";
+    // Use $ to explicitely define the end of a package name. Without
+    // the $, "libc6" would match all of them.
+//  "libc6$";
+//  "libc6-dev$";
+//  "libc6-i686$";
+
+    // Special characters need escaping
+//  "libstdc\+\+6$";
+
+    // The following matches packages like xen-system-amd64, xen-utils-4.1,
+    // xenstore-utils and libxenstore3.0
+//  "(lib)?xen(store)?";
+
+    // For more information about Python regular expressions, see
+    // https://docs.python.org/3/howto/regex.html
 };
 
 // This option allows you to control if on a unclean dpkg exit
 // unattended-upgrades will automatically run 
 //   dpkg --force-confold --configure -a
 // The default is true, to ensure updates keep getting installed
-Unattended-Upgrade::AutoFixInterruptedDpkg "true";
+//Unattended-Upgrade::AutoFixInterruptedDpkg "true";
 
 // Split the upgrade into the smallest possible chunks so that
-// they can be interrupted with SIGUSR1. This makes the upgrade
+// they can be interrupted with SIGTERM. This makes the upgrade
 // a bit slower but it has the benefit that shutdown while a upgrade
 // is running is possible (with a small delay)
-Unattended-Upgrade::MinimalSteps "true";
+//Unattended-Upgrade::MinimalSteps "true";
 
-// Install all unattended-upgrades when the machine is shuting down
+// Install all updates when the machine is shutting down
-// instead of doing it in the background while the machine is running
+// instead of doing it in the background while the machine is running.
-// This will (obviously) make shutdown slower
+// This will (obviously) make shutdown slower.
-Unattended-Upgrade::InstallOnShutdown "false";
+// Unattended-upgrades increases logind's InhibitDelayMaxSec to 30s.
+// This allows more time for unattended-upgrades to shut down gracefully
+// or even install a few packages in InstallOnShutdown mode, but is still a
+// big step back from the 30 minutes allowed for InstallOnShutdown previously.
+// Users enabling InstallOnShutdown mode are advised to increase
+// InhibitDelayMaxSec even further, possibly to 30 minutes.
+//Unattended-Upgrade::InstallOnShutdown "false";
 
 // Send email to this address for problems or packages upgrades
 // If empty or unset then no email is sent, make sure that you
@@ -74,15 +96,23 @@ Unattended-Upgrade::Mail "root";
 // is to always send a mail if Unattended-Upgrade::Mail is set
 Unattended-Upgrade::MailOnlyOnError "true";
 
-// Do automatic removal of new unused dependencies after the upgrade
+// Remove unused automatically installed kernel-related packages
+// (kernel images, kernel headers and kernel version locked tools).
+Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
+
+// Do automatic removal of newly unused dependencies after the upgrade
+Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
+
+// Do automatic removal of unused packages after the upgrade
 // (equivalent to apt-get autoremove)
 Unattended-Upgrade::Remove-Unused-Dependencies "true";
 
 // Automatically reboot *WITHOUT CONFIRMATION* if
-//  the file /var/run/reboot-required is found after the upgrade 
+//  the file /var/run/reboot-required is found after the upgrade
 Unattended-Upgrade::Automatic-Reboot "false";
 
-// Automatically reboot even if there are users currently logged in.
+// Automatically reboot even if there are users currently logged in
+// when Unattended-Upgrade::Automatic-Reboot is set to true
 //Unattended-Upgrade::Automatic-Reboot-WithUsers "true";
 
 // If automatic reboot is enabled and needed, reboot at the specific
@@ -92,10 +122,25 @@ Unattended-Upgrade::Automatic-Reboot "false";
 
 // Use apt bandwidth limit feature, this example limits the download
 // speed to 70kb/sec
-Acquire::http::Dl-Limit "200";
+//Acquire::http::Dl-Limit "70";
 
 // Enable logging to syslog. Default is False
 // Unattended-Upgrade::SyslogEnable "false";
 
 // Specify syslog facility. Default is daemon
 // Unattended-Upgrade::SyslogFacility "daemon";
+
+// Download and install upgrades only on AC power
+// (i.e. skip or gracefully stop updates on battery)
+// Unattended-Upgrade::OnlyOnACPower "true";
+
+// Download and install upgrades only on non-metered connection
+// (i.e. skip or gracefully stop updates on a metered connection)
+// Unattended-Upgrade::Skip-Updates-On-Metered-Connections "true";
+
+// Verbose logging
+// Unattended-Upgrade::Verbose "false";
+
+// Print debugging information both in unattended-upgrades and
+// in unattended-upgrade-shutdown
+// Unattended-Upgrade::Debug "false";