enable trimming in luks (#2443)

backend/src/disk/main.rs

@@ -126,6 +126,7 @@ pub async fn create_fs<P: AsRef<Path>>(
         Command::new("cryptsetup")
             .arg("-q")
             .arg("luksOpen")
+            .arg("--allow-discards")
             .arg(format!("--key-file={}", PASSWORD_PATH))
             .arg(format!("--keyfile-size={}", password.len()))
             .arg(&blockdev_path)

build/lib/scripts/postinst

@@ -76,6 +76,7 @@ sed -i '/\(^\|#\)Storage=/c\Storage=persistent' /etc/systemd/journald.conf
 sed -i '/\(^\|#\)Compress=/c\Compress=yes' /etc/systemd/journald.conf
 sed -i '/\(^\|#\)SystemMaxUse=/c\SystemMaxUse=1G' /etc/systemd/journald.conf
 sed -i '/\(^\|#\)ForwardToSyslog=/c\ForwardToSyslog=no' /etc/systemd/journald.conf
+sed -i '/^\s*#\?\s*issue_discards\s*=\s*/c\issue_discards = 1' /etc/lvm/lvm.conf
 mkdir -p /etc/docker
 cat > /etc/docker/daemon.json << EOF
 {