add host

host/host.go

@@ -0,0 +1,21 @@
+package host
+
+import (
+	"context"
+	"os/exec"
+)
+
+// GetFQDN returns the fully qualified hostname of the current host
+func GetFQDN(ctx context.Context) (string, error) {
+	cmd := exec.CommandContext(ctx, "hostname", "--fqdn")
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
+
+	b, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	return string(b), nil
+}