tests: document requirements of networkd integration tests (#3125)

Document the necessary dependencies and nspawn/lxd options to run
test/networkd-test.py.

diff --git a/test/networkd-test.py b/test/networkd-test.py
index d76ab507d221172fddd67d0b4823000275e9bfb5..d4de5adf1a516355ef05479954f2b309e09fa1d4 100755 (executable)
--- a/test/networkd-test.py
+++ b/test/networkd-test.py
@@ -5,7 +5,12 @@
 # does not write anything on disk or change any system configuration;
 # but it assumes (and checks at the beginning) that networkd is not currently
 # running.
-# This can be run on a normal installation, in QEMU, nspawn, or LXC.
+#
+# This can be run on a normal installation, in QEMU, nspawn (with
+# --private-network), LXD (with "--config raw.lxc=lxc.aa_profile=unconfined"),
+# or LXC system containers. You need at least the "ip" tool from the iproute
+# package; it is recommended to install dnsmasq too to get full test coverage.
+#
 # ATTENTION: This uses the *installed* networkd, not the one from the built
 # source tree.
 #