clientupdate: implement update for Unraid (#10344)

Use the [`plugin`
CLI](https://forums.unraid.net/topic/72240-solved-is-there-a-way-to-installuninstall-plugins-from-script/#comment-676870)
to fetch and apply the update.

Updates https://github.com/tailscale/tailscale/issues/10184

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>

clientupdate/clientupdate.go

@@ -176,10 +176,7 @@ func (up *Updater) getUpdateFunction() (fn updateFunction, canAutoUpdate bool) {
 		case distro.Alpine:
 			return up.updateAlpineLike, true
 		case distro.Unraid:
-			// Unraid runs from memory, updates must be installed via the Unraid
+			return up.updateUnraid, true
-			// plugin manager to be persistent.
-			// TODO(awly): implement Unraid updates using the 'plugin' CLI.
-			return nil, false
 		case distro.QNAP:
 			return up.updateQNAP, true
 		}
@@ -1148,6 +1145,64 @@ func (up *Updater) updateQNAP() (err error) {
 	return nil
 }
 
+func (up *Updater) updateUnraid() (err error) {
+	if up.Version != "" {
+		return errors.New("installing a specific version on Unraid is not supported")
+	}
+	if err := requireRoot(); err != nil {
+		return err
+	}
+
+	defer func() {
+		if err != nil {
+			err = fmt.Errorf(`%w; you can try updating using "plugin check tailscale.plg && plugin update tailscale.plg"`, err)
+		}
+	}()
+
+	// We need to run `plugin check` for the latest tailscale.plg to get
+	// downloaded. Unfortunately, the output of this command does not contain
+	// the latest tailscale version available. So we'll parse the downloaded
+	// tailscale.plg file manually below.
+	out, err := exec.Command("plugin", "check", "tailscale.plg").CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("failed to check if Tailscale plugin is upgradable: %w, output: %q", err, out)
+	}
+
+	// Note: 'plugin check' downloads plugins to /tmp/plugins.
+	// The installed .plg files are in /boot/config/plugins/, but the pending
+	// ones are in /tmp/plugins. We should parse the pending file downloaded by
+	// 'plugin check'.
+	latest, err := parseUnraidPluginVersion("/tmp/plugins/tailscale.plg")
+	if err != nil {
+		return fmt.Errorf("failed to find latest Tailscale version in /boot/config/plugins/tailscale.plg: %w", err)
+	}
+	if !up.confirm(latest) {
+		return nil
+	}
+
+	up.Logf("c2n: running 'plugin update tailscale.plg'")
+	cmd := exec.Command("plugin", "update", "tailscale.plg")
+	cmd.Stdout = up.Stdout
+	cmd.Stderr = up.Stderr
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed tailscale plugin update: %w", err)
+	}
+	return nil
+}
+
+func parseUnraidPluginVersion(plgPath string) (string, error) {
+	plg, err := os.ReadFile(plgPath)
+	if err != nil {
+		return "", err
+	}
+	re := regexp.MustCompile(`<FILE Name="/boot/config/plugins/tailscale/tailscale_(\d+\.\d+\.\d+)_[a-z0-9]+.tgz">`)
+	match := re.FindStringSubmatch(string(plg))
+	if len(match) < 2 {
+		return "", errors.New("version not found in plg file")
+	}
+	return match[1], nil
+}
+
 func writeFile(r io.Reader, path string, perm os.FileMode) error {
 	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
 		return fmt.Errorf("failed to remove existing file at %q: %w", path, err)

clientupdate/clientupdate_test.go

@@ -795,3 +795,31 @@ func TestCleanupOldDownloads(t *testing.T) {
 		})
 	}
 }
+
+func TestParseUnraidPluginVersion(t *testing.T) {
+	tests := []struct {
+		plgPath string
+		wantVer string
+		wantErr string
+	}{
+		{plgPath: "testdata/tailscale-1.52.0.plg", wantVer: "1.52.0"},
+		{plgPath: "testdata/tailscale-1.54.0.plg", wantVer: "1.54.0"},
+		{plgPath: "testdata/tailscale-nover.plg", wantErr: "version not found in plg file"},
+		{plgPath: "testdata/tailscale-nover-path-mentioned.plg", wantErr: "version not found in plg file"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.plgPath, func(t *testing.T) {
+			got, err := parseUnraidPluginVersion(tt.plgPath)
+			if got != tt.wantVer {
+				t.Errorf("got version: %q, want %q", got, tt.wantVer)
+			}
+			var gotErr string
+			if err != nil {
+				gotErr = err.Error()
+			}
+			if gotErr != tt.wantErr {
+				t.Errorf("got error: %q, want %q", gotErr, tt.wantErr)
+			}
+		})
+	}
+}

clientupdate/testdata/tailscale-1.52.0.plg

@@ -0,0 +1,115 @@
+<?xml version='1.0' standalone='yes'?>
+<!DOCTYPE PLUGIN>
+
+<PLUGIN
+  name="tailscale"
+  author="Derek Kaser"
+  version="2023.11.01"
+  pluginURL="https://raw.githubusercontent.com/dkaser/unraid-tailscale/main/plugin/tailscale.plg"
+  launch="Settings/Tailscale"
+  support="https://forums.unraid.net/topic/136889-plugin-tailscale/"
+>
+
+<CHANGES>
+<![CDATA[
+###2023.11.01###
+- Update Tailscale to 1.52.0 (new checksum from upstream package server)
+
+###2023.10.31###
+- Update Tailscale to 1.52.0
+
+###2023.10.29###
+- Update Tailscale to 1.50.1
+- Fix nginx hang when Tailscale restarts
+
+###2023.09.26###
+- Update Tailscale to 1.50.0
+- New Tailscale web interface
+
+###2023.09.14a###
+- Update Tailscale to 1.48.2
+
+###2023.08.22###
+- Update Tailscale to 1.48.1
+
+For older releases, see https://github.com/dkaser/unraid-tailscale/releases
+]]>
+</CHANGES>
+
+<FILE Name="/boot/config/plugins/tailscale/tailscale_1.52.0_amd64.tgz">
+<URL>https://pkgs.tailscale.com/stable/tailscale_1.52.0_amd64.tgz</URL>
+<MD5>b4d15d9908737e08e3f95ed5104603ce</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-tailscale-utils/releases/download/1.4.1/unraid-tailscale-utils-1.4.1-noarch-1.txz</URL>
+<MD5>7095ab4b88b34d8f5da6483865883267</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-plugin-diagnostics/releases/download/1.2.2/unraid-plugin-diagnostics-1.2.2-noarch-1.txz</URL>
+<MD5>9d358575499305889962d83ebd90c20c</MD5>
+</FILE>
+
+<!--
+The 'install' script.
+-->
+<FILE Run="/bin/bash">
+<INLINE>
+<![CDATA[
+if [ -d "/usr/local/emhttp/plugins/tailscale" ]; then
+    rm -rf /usr/local/emhttp/plugins/tailscale
+fi
+
+upgradepkg --install-new /boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz
+upgradepkg --install-new --reinstall /boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz
+
+mkdir -p /usr/local/emhttp/plugins/tailscale/bin
+tar xzf /boot/config/plugins/tailscale/tailscale_1.52.0_amd64.tgz --strip-components 1 -C /usr/local/emhttp/plugins/tailscale/bin
+
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscale /usr/local/sbin/tailscale
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscaled /usr/local/sbin/tailscaled
+
+mkdir -p /var/local/emhttp/plugins/tailscale
+echo "VERSION=2023.11.01" >> /var/local/emhttp/plugins/tailscale/tailscale.ini
+
+# start tailscaled
+/usr/local/emhttp/plugins/tailscale/restart.sh
+
+# cleanup old versions
+rm -f /boot/config/plugins/tailscale/tailscale-utils-*.txz
+rm -f $(ls /boot/config/plugins/tailscale/unraid-tailscale-utils-*.txz 2>/dev/null | grep -v '1.4.1')
+rm -f $(ls /boot/config/plugins/tailscale/unraid-plugin-diagnostics-*.txz 2>/dev/null | grep -v '1.2.2')
+rm -f $(ls /boot/config/plugins/tailscale/*.tgz 2>/dev/null | grep -v 'tailscale_1.52.0_amd64')
+
+echo ""
+echo "----------------------------------------------------"
+echo " tailscale has been installed."
+echo " Version: 2023.11.01"
+echo "----------------------------------------------------"
+echo ""
+]]>
+</INLINE>
+</FILE>
+
+<!--
+The 'remove' script.
+-->
+<FILE Run="/bin/bash" Method="remove">
+<INLINE>
+<![CDATA[
+# Stop service
+/etc/rc.d/rc.tailscale stop 2>/dev/null
+
+rm /usr/local/sbin/tailscale
+rm /usr/local/sbin/tailscaled
+
+removepkg unraid-tailscale-utils-1.4.1
+
+rm -rf /usr/local/emhttp/plugins/tailscale
+rm -rf /boot/config/plugins/tailscale
+]]>
+</INLINE>
+</FILE>
+
+</PLUGIN>

clientupdate/testdata/tailscale-1.54.0.plg

@@ -0,0 +1,112 @@
+<?xml version='1.0' standalone='yes'?>
+<!DOCTYPE PLUGIN>
+
+<PLUGIN
+  name="tailscale"
+  author="Derek Kaser"
+  version="2023.11.18"
+  pluginURL="https://raw.githubusercontent.com/dkaser/unraid-tailscale/main/plugin/tailscale.plg"
+  launch="Settings/Tailscale"
+  support="https://forums.unraid.net/topic/136889-plugin-tailscale/"
+>
+
+<CHANGES>
+<![CDATA[
+###2023.11.18###
+- Update Tailscale to 1.54.0
+
+###2023.11.01###
+- Update Tailscale to 1.52.0 (new checksum from upstream package server)
+
+###2023.10.31###
+- Update Tailscale to 1.52.0
+
+###2023.10.29###
+- Update Tailscale to 1.50.1
+- Fix nginx hang when Tailscale restarts
+
+###2023.09.26###
+- Update Tailscale to 1.50.0
+- New Tailscale web interface
+
+For older releases, see https://github.com/dkaser/unraid-tailscale/releases
+]]>
+</CHANGES>
+
+<FILE Name="/boot/config/plugins/tailscale/tailscale_1.54.0_amd64.tgz">
+<URL>https://pkgs.tailscale.com/stable/tailscale_1.54.0_amd64.tgz</URL>
+<MD5>20187743e0c1c1a0d9fea47a10b6a9ba</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-tailscale-utils/releases/download/1.4.1/unraid-tailscale-utils-1.4.1-noarch-1.txz</URL>
+<MD5>7095ab4b88b34d8f5da6483865883267</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-plugin-diagnostics/releases/download/1.2.2/unraid-plugin-diagnostics-1.2.2-noarch-1.txz</URL>
+<MD5>9d358575499305889962d83ebd90c20c</MD5>
+</FILE>
+
+<!--
+The 'install' script.
+-->
+<FILE Run="/bin/bash">
+<INLINE>
+<![CDATA[
+if [ -d "/usr/local/emhttp/plugins/tailscale" ]; then
+    rm -rf /usr/local/emhttp/plugins/tailscale
+fi
+
+upgradepkg --install-new /boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz
+upgradepkg --install-new --reinstall /boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz
+
+mkdir -p /usr/local/emhttp/plugins/tailscale/bin
+tar xzf /boot/config/plugins/tailscale/tailscale_1.54.0_amd64.tgz --strip-components 1 -C /usr/local/emhttp/plugins/tailscale/bin
+
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscale /usr/local/sbin/tailscale
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscaled /usr/local/sbin/tailscaled
+
+mkdir -p /var/local/emhttp/plugins/tailscale
+echo "VERSION=2023.11.18" >> /var/local/emhttp/plugins/tailscale/tailscale.ini
+
+# start tailscaled
+/usr/local/emhttp/plugins/tailscale/restart.sh
+
+# cleanup old versions
+rm -f /boot/config/plugins/tailscale/tailscale-utils-*.txz
+rm -f $(ls /boot/config/plugins/tailscale/unraid-tailscale-utils-*.txz 2>/dev/null | grep -v '1.4.1')
+rm -f $(ls /boot/config/plugins/tailscale/unraid-plugin-diagnostics-*.txz 2>/dev/null | grep -v '1.2.2')
+rm -f $(ls /boot/config/plugins/tailscale/*.tgz 2>/dev/null | grep -v 'tailscale_1.54.0_amd64')
+
+echo ""
+echo "----------------------------------------------------"
+echo " tailscale has been installed."
+echo " Version: 2023.11.18"
+echo "----------------------------------------------------"
+echo ""
+]]>
+</INLINE>
+</FILE>
+
+<!--
+The 'remove' script.
+-->
+<FILE Run="/bin/bash" Method="remove">
+<INLINE>
+<![CDATA[
+# Stop service
+/etc/rc.d/rc.tailscale stop 2>/dev/null
+
+rm /usr/local/sbin/tailscale
+rm /usr/local/sbin/tailscaled
+
+removepkg unraid-tailscale-utils-1.4.1
+
+rm -rf /usr/local/emhttp/plugins/tailscale
+rm -rf /boot/config/plugins/tailscale
+]]>
+</INLINE>
+</FILE>
+
+</PLUGIN>

clientupdate/testdata/tailscale-nover-path-mentioned.plg

@@ -0,0 +1,110 @@
+<?xml version='1.0' standalone='yes'?>
+<!DOCTYPE PLUGIN>
+
+<PLUGIN
+  name="tailscale"
+  author="Derek Kaser"
+  version="2023.11.01"
+  pluginURL="https://raw.githubusercontent.com/dkaser/unraid-tailscale/main/plugin/tailscale.plg"
+  launch="Settings/Tailscale"
+  support="https://forums.unraid.net/topic/136889-plugin-tailscale/"
+>
+
+<CHANGES>
+<![CDATA[
+###2023.11.01###
+- Update Tailscale to 1.52.0 (new checksum from upstream package server)
+
+###2023.10.31###
+- Update Tailscale to 1.52.0
+
+###2023.10.29###
+- Update Tailscale to 1.50.1
+- Fix nginx hang when Tailscale restarts
+
+###2023.09.26###
+- Update Tailscale to 1.50.0
+- New Tailscale web interface
+
+###2023.09.14a###
+- Update Tailscale to 1.48.2
+
+###2023.08.22###
+- Update Tailscale to 1.48.1
+
+For older releases, see https://github.com/dkaser/unraid-tailscale/releases
+]]>
+</CHANGES>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-tailscale-utils/releases/download/1.4.1/unraid-tailscale-utils-1.4.1-noarch-1.txz</URL>
+<MD5>7095ab4b88b34d8f5da6483865883267</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-plugin-diagnostics/releases/download/1.2.2/unraid-plugin-diagnostics-1.2.2-noarch-1.txz</URL>
+<MD5>9d358575499305889962d83ebd90c20c</MD5>
+</FILE>
+
+<!--
+The 'install' script.
+-->
+<FILE Run="/bin/bash">
+<INLINE>
+<![CDATA[
+if [ -d "/usr/local/emhttp/plugins/tailscale" ]; then
+    rm -rf /usr/local/emhttp/plugins/tailscale
+fi
+
+upgradepkg --install-new /boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz
+upgradepkg --install-new --reinstall /boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz
+
+mkdir -p /usr/local/emhttp/plugins/tailscale/bin
+tar xzf /boot/config/plugins/tailscale/tailscale_1.52.0_amd64.tgz --strip-components 1 -C /usr/local/emhttp/plugins/tailscale/bin
+
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscale /usr/local/sbin/tailscale
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscaled /usr/local/sbin/tailscaled
+
+mkdir -p /var/local/emhttp/plugins/tailscale
+echo "VERSION=2023.11.01" >> /var/local/emhttp/plugins/tailscale/tailscale.ini
+
+# start tailscaled
+/usr/local/emhttp/plugins/tailscale/restart.sh
+
+# cleanup old versions
+rm -f /boot/config/plugins/tailscale/tailscale-utils-*.txz
+rm -f $(ls /boot/config/plugins/tailscale/unraid-tailscale-utils-*.txz 2>/dev/null | grep -v '1.4.1')
+rm -f $(ls /boot/config/plugins/tailscale/unraid-plugin-diagnostics-*.txz 2>/dev/null | grep -v '1.2.2')
+rm -f $(ls /boot/config/plugins/tailscale/*.tgz 2>/dev/null | grep -v 'tailscale_1.52.0_amd64')
+
+echo ""
+echo "----------------------------------------------------"
+echo " tailscale has been installed."
+echo " Version: 2023.11.01"
+echo "----------------------------------------------------"
+echo ""
+]]>
+</INLINE>
+</FILE>
+
+<!--
+The 'remove' script.
+-->
+<FILE Run="/bin/bash" Method="remove">
+<INLINE>
+<![CDATA[
+# Stop service
+/etc/rc.d/rc.tailscale stop 2>/dev/null
+
+rm /usr/local/sbin/tailscale
+rm /usr/local/sbin/tailscaled
+
+removepkg unraid-tailscale-utils-1.4.1
+
+rm -rf /usr/local/emhttp/plugins/tailscale
+rm -rf /boot/config/plugins/tailscale
+]]>
+</INLINE>
+</FILE>
+
+</PLUGIN>

clientupdate/testdata/tailscale-nover.plg

@@ -0,0 +1,102 @@
+<?xml version='1.0' standalone='yes'?>
+<!DOCTYPE PLUGIN>
+
+<PLUGIN
+  name="tailscale"
+  author="Derek Kaser"
+  version="2023.11.01"
+  pluginURL="https://raw.githubusercontent.com/dkaser/unraid-tailscale/main/plugin/tailscale.plg"
+  launch="Settings/Tailscale"
+  support="https://forums.unraid.net/topic/136889-plugin-tailscale/"
+>
+
+<CHANGES>
+<![CDATA[
+###2023.10.29###
+- Update Tailscale to 1.50.1
+- Fix nginx hang when Tailscale restarts
+
+###2023.09.26###
+- Update Tailscale to 1.50.0
+- New Tailscale web interface
+
+###2023.09.14a###
+- Update Tailscale to 1.48.2
+
+###2023.08.22###
+- Update Tailscale to 1.48.1
+
+For older releases, see https://github.com/dkaser/unraid-tailscale/releases
+]]>
+</CHANGES>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-tailscale-utils/releases/download/1.4.1/unraid-tailscale-utils-1.4.1-noarch-1.txz</URL>
+<MD5>7095ab4b88b34d8f5da6483865883267</MD5>
+</FILE>
+
+<FILE Name="/boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz">
+<URL>https://github.com/dkaser/unraid-plugin-diagnostics/releases/download/1.2.2/unraid-plugin-diagnostics-1.2.2-noarch-1.txz</URL>
+<MD5>9d358575499305889962d83ebd90c20c</MD5>
+</FILE>
+
+<!--
+The 'install' script.
+-->
+<FILE Run="/bin/bash">
+<INLINE>
+<![CDATA[
+if [ -d "/usr/local/emhttp/plugins/tailscale" ]; then
+    rm -rf /usr/local/emhttp/plugins/tailscale
+fi
+
+upgradepkg --install-new /boot/config/plugins/tailscale/unraid-plugin-diagnostics-1.2.2-noarch-1.txz
+upgradepkg --install-new --reinstall /boot/config/plugins/tailscale/unraid-tailscale-utils-1.4.1-noarch-1.txz
+
+mkdir -p /usr/local/emhttp/plugins/tailscale/bin
+
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscale /usr/local/sbin/tailscale
+ln -s /usr/local/emhttp/plugins/tailscale/bin/tailscaled /usr/local/sbin/tailscaled
+
+mkdir -p /var/local/emhttp/plugins/tailscale
+echo "VERSION=2023.11.01" >> /var/local/emhttp/plugins/tailscale/tailscale.ini
+
+# start tailscaled
+/usr/local/emhttp/plugins/tailscale/restart.sh
+
+# cleanup old versions
+rm -f /boot/config/plugins/tailscale/tailscale-utils-*.txz
+rm -f $(ls /boot/config/plugins/tailscale/unraid-tailscale-utils-*.txz 2>/dev/null | grep -v '1.4.1')
+rm -f $(ls /boot/config/plugins/tailscale/unraid-plugin-diagnostics-*.txz 2>/dev/null | grep -v '1.2.2')
+
+echo ""
+echo "----------------------------------------------------"
+echo " tailscale has been installed."
+echo " Version: 2023.11.01"
+echo "----------------------------------------------------"
+echo ""
+]]>
+</INLINE>
+</FILE>
+
+<!--
+The 'remove' script.
+-->
+<FILE Run="/bin/bash" Method="remove">
+<INLINE>
+<![CDATA[
+# Stop service
+/etc/rc.d/rc.tailscale stop 2>/dev/null
+
+rm /usr/local/sbin/tailscale
+rm /usr/local/sbin/tailscaled
+
+removepkg unraid-tailscale-utils-1.4.1
+
+rm -rf /usr/local/emhttp/plugins/tailscale
+rm -rf /boot/config/plugins/tailscale
+]]>
+</INLINE>
+</FILE>
+
+</PLUGIN>

cmd/tailscale/cli/update.go

@@ -32,7 +32,12 @@ var updateCmd = &ffcli.Command{
 		//  - Arch (and other pacman-based distros)
 		//  - Alpine (and other apk-based distros)
 		//  - FreeBSD (and other pkg-based distros)
-		if distro.Get() != distro.Arch && distro.Get() != distro.Alpine && runtime.GOOS != "freebsd" {
+		//  - Unraid/QNAP/Synology
+		if distro.Get() != distro.Arch &&
+			distro.Get() != distro.Alpine &&
+			distro.Get() != distro.QNAP &&
+			distro.Get() != distro.Synology &&
+			runtime.GOOS != "freebsd" {
 			fs.StringVar(&updateArgs.track, "track", "", `which track to check for updates: "stable" or "unstable" (dev); empty means same as current`)
 			fs.StringVar(&updateArgs.version, "version", "", `explicit version to update/downgrade to`)
 		}

ipn/ipnlocal/c2n.go

@@ -395,13 +395,18 @@ func findCmdTailscale() (string, error) {
 		if self == "/usr/local/sbin/tailscaled" || self == "/usr/local/bin/tailscaled" {
 			ts = "/usr/local/bin/tailscale"
 		}
-		if distro.Get() == distro.QNAP {
+		switch distro.Get() {
+		case distro.QNAP:
 			// The volume under /share/ where qpkg are installed is not
 			// predictable. But the rest of the path is.
 			ok, err := filepath.Match("/share/*/.qpkg/Tailscale/tailscaled", self)
 			if err == nil && ok {
 				ts = filepath.Join(filepath.Dir(self), "tailscale")
 			}
+		case distro.Unraid:
+			if self == "/usr/local/emhttp/plugins/tailscale/bin/tailscaled" {
+				ts = "/usr/local/emhttp/plugins/tailscale/bin/tailscale"
+			}
 		}
 	case "windows":
 		ts = filepath.Join(filepath.Dir(self), "tailscale.exe")