feat(vm::systemd): enable add-cloudflare-dns.service

.github/workflows/vm-minimal.yml

@@ -120,6 +120,8 @@ jobs:
           sshd_cfg=ssh/vm.sshd.conf
           sudo install -Dm600 $sshd_cfg rootfs/etc/ssh/sshd_config.d/vm.conf
           unlink $sshd_cfg
+
+          sudo cp -v ${{env.DEV_DIR}}/systemd/* rootfs/etc/systemd/system/
           sudo cp -a rootfs kernel_r
           sudo systemd-nspawn -D kernel_r sh -c 'apt-install linux-image-cloud-amd64'
 
@@ -160,8 +162,12 @@ jobs:
             install -m644 resolv.conf /etc/resolv.conf
             # serial@ttyS0
             cp /usr/lib/systemd/system/serial-getty@.service /etc/systemd/system/serial-getty@ttyS0.service
-            systemctl disable systemd-networkd-wait-online.service
             sed '/ExecStart=/ s@- $TERM@--autologin root --local-line ttyS0 xterm@' -i /etc/systemd/system/serial-getty@ttyS0.service
+
+            systemctl disable systemd-networkd-wait-online.service
+            systemctl set-default multi-user.target
+            systemctl enable add-cloudflare-dns.service
+
             apt-get autopurge -y
             apt-get clean
             ls -lh /var/cache/apt

assets/vm-minimal/systemd/add-cloudflare-dns.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Update resolv.conf with Cloudflare DNS
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/bin/sh -c 'printf "nameserver 1.1.1.1\nnameserver 1.0.0.1\n" >> /etc/resolv.conf'
+
+[Install]
+WantedBy=default.target