Update common role

- Add secure-secure-shell task
- Add unattended-upgrades task
- Change package installation tasks
- Remove website tasks from generic services group

roles/common/templates/50unattended-upgrades.j2

@@ -0,0 +1,84 @@
+// Unattended-Upgrade::Origins-Pattern controls which packages are
+// upgraded.
+//
+// Lines below have the format format is "keyword=value,...".  A
+// package will be upgraded only if the values in its metadata match
+// all the supplied keywords in a line.  (In other words, omitted
+// keywords are wild cards.) The keywords originate from the Release
+// file, but several aliases are accepted.  The accepted keywords are:
+//   a,archive,suite (eg, "stable")
+//   c,component     (eg, "main", "crontrib", "non-free")
+//   l,label         (eg, "Debian", "Debian-Security")
+//   o,origin        (eg, "Debian", "Unofficial Multimedia Packages")
+//   n,codename      (eg, "jessie", "jessie-updates")
+//     site          (eg, "http.debian.net")
+// The available values on the system are printed by the command
+// "apt-cache policy", and can be debugged by running
+// "unattended-upgrades -d" and looking at the log file.
+//
+// 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")
+Unattended-Upgrade::Origins-Pattern {
+{% for origin in unattended_upgrades_origins %}
+  "{{ origin }}";
+{% endfor %}
+};
+
+// List of packages to not update (regexp are supported)
+Unattended-Upgrade::Package-Blacklist {
+//	"vim";
+//	"libc6";
+//	"libc6-dev";
+//	"libc6-i686";
+};
+
+// 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 "false";
+
+// Split the upgrade into the smallest possible chunks so that
+// they can be interrupted with SIGUSR1. 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";
+
+// Install all unattended-upgrades when the machine is shuting down
+// instead of doing it in the background while the machine is running
+// This will (obviously) make shutdown slower
+//Unattended-Upgrade::InstallOnShutdown "true";
+
+{% if unattended_upgrades_mail %}
+// Send email to this address for problems or packages upgrades
+// If empty or unset then no email is sent, make sure that you
+// have a working mail setup on your system. A package that provides
+// 'mailx' must be installed. E.g. "user@example.com"
+Unattended-Upgrade::Mail "{{ unattended_upgrades_mail }}";
+{% endif %}
+
+// Set this value to "true" to get emails only on errors. Default
+// 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
+// (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
+Unattended-Upgrade::Automatic-Reboot "{{ unattended_upgrades_reboot }}";
+
+// If automatic reboot is enabled and needed, reboot at the specific
+// time instead of immediately
+//  Default: "now"
+Unattended-Upgrade::Automatic-Reboot-Time "{{ unattended_upgrades_reboot_time }}";
+
+// Use apt bandwidth limit feature, this example limits the download
+// speed to 70kb/sec
+//Acquire::http::Dl-Limit "70";
+
+// Do not cause conffile prompts
+Dpkg::Options { --force-confold; };

roles/common/templates/sshd_config.j2

@@ -0,0 +1,26 @@
+Port 22
+Protocol 2
+HostKey /etc/ssh/ssh_host_ed25519_key
+HostKey /etc/ssh/ssh_host_rsa_key
+KexAlgorithms curve25519-sha256@libssh.org
+Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
+MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-ripemd160-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,umac-128@openssh.com
+
+ChallengeResponseAuthentication no
+HostbasedAuthentication no
+PasswordAuthentication no
+PubkeyAuthentication yes
+
+IgnoreUserKnownHosts yes
+PermitRootLogin no
+PrintMotd no
+StrictModes yes
+Subsystem sftp internal-sftp
+UsePAM yes
+
+{% for block in ssh_match_blocks %}
+Match {{ block.match }}
+{% for option in block.options %}
+  {{ option }}
+{% endfor %}
+{% endfor %}