各ディストリビューションのsystemd-resolve状況調査2022

Lightsailで提供されているamiで使いそうなものをざっと確認

ubuntu 20.04(kernel5.4)

systemd-resoveがデフォルトで動いていてsystemd-resolveとresolvectlが両方いる

$ systemctl --version
systemd 245 (245.4-4ubuntu3.1)
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid
$ systemd-resolve --statistics
DNSSEC supported by current servers: no

Transactions
Current Transactions: 0
  Total Transactions: 28

Cache
  Current Cache Size: 2
          Cache Hits: 3
        Cache Misses: 29

DNSSEC Verdicts
              Secure: 0
            Insecure: 0
               Bogus: 0
       Indeterminate: 0
$ resolvectl statistics
DNSSEC supported by current servers: no

Transactions
Current Transactions: 0
  Total Transactions: 36

Cache
  Current Cache Size: 1
          Cache Hits: 3
        Cache Misses: 37

DNSSEC Verdicts
              Secure: 0
            Insecure: 0
               Bogus: 0
       Indeterminate: 0

Amazon Linux 2 (kernel4.14)

systemd-resolvedはそもそもいない、手動でインストールできるがコマンドもなくdbus経由でもプロパティ取得できないっぽいのであまり気にしなくてよさそう

2022が正式にリリースされたら再確認

$ systemctl --version
systemd 219
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN
$ dbus-send --print-reply --system --dest=org.freedesktop.resolve1  /org/freedesktop/resolve1 --type=method_call  org.freedesktop.DBus.Properties.GetAll string:org.freedesktop.resolve1.Managerl
Error org.freedesktop.DBus.Error.UnknownInterface: Unknown interface 'org.freedesktop.resolve1.Managerl'.
[ec2-user@ip-172-26-10-221 ~]$ dbus-send --print-reply --system --dest=org.freedesktop.resolve1  /org/freedesktop/resolve1 --type=method_call  org.freedesktop.DBus.Properties.GetAll string:org.freedesktop.resolve1.Manager
method return time=1645836357.009983 sender=:1.64 -> destination=:1.75 serial=8 reply_serial=2
   array [
   ]

CentOS 8.2.2004（kernel4.18）

systemd-resoveがデフォルトで動いている、コマンドもどっちもいて統計情報もとれる

$ systemctl --version
systemd 239
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=legacy
$ systemd-resolve --statistics
DNSSEC supported by current servers: yes

Transactions
Current Transactions: 0
  Total Transactions: 2

Cache
  Current Cache Size: 0
          Cache Hits: 0
        Cache Misses: 0

DNSSEC Verdicts
              Secure: 0
            Insecure: 0
               Bogus: 0
       Indeterminate: 0

$ resolvectl statistics
DNSSEC supported by current servers: yes

Transactions
Current Transactions: 0
  Total Transactions: 2

Cache
  Current Cache Size: 0
          Cache Hits: 0
        Cache Misses: 0

DNSSEC Verdicts
              Secure: 0
            Insecure: 0
               Bogus: 0
       Indeterminate: 0