All of the LocalTrafficDetector implementations were essentially
identical after construction time, so just reduce them to a single
implementation with multiple constructors.
Also, improve the comments.
Refactor the TestValidateKubeProxyConfiguration by adding a mutating
function that adjusts the configuration according to each test case,
thereby enhancing readability.
Signed-off-by: Daman Arora <aroradaman@gmail.com>
This reverts commit 8bccf4873b, except
for the nftables unit test changes, since we still want the "new"
results (not to mention the bugfixes), just for a different reason
now.
The behavior when you specify no --nodeport-addresses value in a
dual-stack cluster is terrible and we can't fix it, for
backward-compatibility reasons. Actually, the behavior when you
specify no --nodeport-addresses value in a single-stack cluster isn't
exactly awesome either...
Allow specifying `--nodeport-addresses primary` to get the
previously-nftables-backend-specific behavior of listening on only the
node's primary IP or IPs.
Add packet tracing unit tests for ipv4 and ipv6.
Remove unreachable code from runChain, since some of the parsed rules
are never generated by the proxy implementation.
Signed-off-by: Nadia Pinaeva <n.m.pinaeva@gmail.com>
We enabled topology hint on one of our services and this log line was
emitted ~92 million times in one day from one cluster tripping our log
quota for that cluster, as it is the log line cannot be disabled via the
`-v` flag because it does not specify verbosity.
I think more log locations need to set verbosity at which they are
logged, but this one is currently hurting the most.
Do an extra "add+delete" once to ensure all previous base chains in the
table will be recreated. Otherwise, altering properties (e.g. priority)
of these chains would fail the transaction.
Signed-off-by: Quan Tian <qtian@vmware.com>
The winkernel code was originally based on the iptables code but never
made use of some parts of it. (e.g., it logs a warning if you didn't
set `--cluster-cidr`, even though it doesn't actually use
`--cluster-cidr` if you do set it.)
NFTables proxy will no longer install drop and reject rules for node
port services with no endpoints in chains associated with forward and
output hooks.
Signed-off-by: Daman Arora <aroradaman@gmail.com>
NFTables proxy will now drop traffic directed towards unallocated
ClusterIPs and reject traffic directed towards invalid ports of
Cluster IPs.
Signed-off-by: Daman Arora <aroradaman@gmail.com>
This replaces the klog formatting and message routing with a simpler
implementation that uses less code. The main difference is that we skip the
entire unused message routing.
Instead, the same split output streams as for JSON gets implemented in the
io.Writer implementation that gets passed to the textlogger.
And use the fake interface in the unit tests, removing the dependency
on setting up FakeExec stuff when conntrack cleanup will be invoked.
Also, remove the isIPv6 argument to CleanStaleEntries, because it can
be inferred from the other args.
The iptables and nftables proxy backends had 2 unit tests
(TestDeleteEndpointConnections and TestProxierDeleteNodePortStaleUDP)
that were effectively testing that:
- If the proxy saw various Service/EndpointSlice events this would
result in specific changes to the service/endpoints trackers, AND
- If the service/endpoints trackers changed in those specific ways
this would result in specific UpdateServiceMapResult and
UpdateEndpointsMapResult values being generated, AND
- If you passed those specific UpdateServiceMapResult and
UpdateEndpointsMapResult values to conntrack.CleanStaleEntries it
would make specific calls to the lower-level conntrack methods,
AND
- If you called the lower-level conntrack methods with those
specific arguments, it would result in specific executions of the
conntrack binary, mixed with a specific number of klog
invocations.
This... is not a good unit test. We already test the change tracker
behavior in other unit tests, and we already tested the
Update{Service,Endpoints}MapResult behavior in the pkg/proxy unit
tests, and we already tested the conntrack exec behavior in
pkg/proxy/conntrack/conntrack_test.go, and we now test the
CleanStaleEntries behavior in pkg/proxy/conntrack/cleanup_test.go. So
there is no need to try to test the top-to-bottom behavior as a "unit
test".
Add an interface between CleanStaleEntries and the lower-level
conntrack helpers (ClearEntriesForIP, etc), and a fake implementation
of that interface, so that we can explicitly test CleanStaleEntries's
logic.
Remove some comments from conntrack.go that were explaining the
functions' callers rather than explaining the functions themselves
(and which were redundant with other comments in the callers anyway).
Fix the test names to match the functions they are testing.
Abstract out the repetitive FakeExec handling.
Explicitly specify the "expectCommand" in each one, to make it clearer
that that's really the part that we're testing.
For everything except TestExec(), test each case with both a "success"
result and a "nothing to delete" result from the conntrack binary.
