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Irbe Krumina b406f209c3 cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436) ... cmd/{containerboot,k8s-operator},kube: add preshutdown hook for egress PG proxies This change is part of work towards minimizing downtime during update rollouts of egress ProxyGroup replicas. This change: - updates the containerboot health check logic to return Pod IP in headers, if set - always runs the health check for egress PG proxies - updates ClusterIP Services created for PG egress endpoints to include the health check endpoint - implements preshutdown endpoint in proxies. The preshutdown endpoint logic waits till, for all currently configured egress services, the ClusterIP Service health check endpoint is no longer returned by the shutting-down Pod (by looking at the new Pod IP header). - ensures that kubelet is configured to call the preshutdown endpoint This reduces the possibility that, as replicas are terminated during an update, a replica gets terminated to which cluster traffic is still being routed via the ClusterIP Service because kube proxy has not yet updated routig rules. This is not a perfect check as in practice, it only checks that the kube proxy on the node on which the proxy runs has updated rules. However, overall this might be good enough. The preshutdown logic is disabled if users have configured a custom health check port via TS_LOCAL_ADDR_PORT env var. This change throws a warnign if so and in future setting of that env var for operator proxies might be disallowed (as users shouldn't need to configure this for a Pod directly). This is backwards compatible with earlier proxy versions. Updates tailscale/tailscale#14326 Signed-off-by: Irbe Krumina <irbe@tailscale.com>		10 months ago
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forwarding.go	cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658)	1 year ago
healthz.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
kube.go	cmd/containerboot: don't attempt to patch a Secret field without permissions (#14365)	12 months ago
kube_test.go	cmd/{containerboot,k8s-operator},kube/kubetypes: kube Ingress L7 proxies only advertise HTTPS endpoint when ready (#14171)	1 year ago
main.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
main_test.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
metrics.go	cmd/containerboot: serve health on local endpoint (#14246)	1 year ago
serve.go	cmd/{k8s-operator,containerboot},kube/kubetypes: parse Ingresses for ingress ProxyGroup (#14583)	11 months ago
serve_test.go	cmd/containerboot: load containerboot serve config that does not contain HTTPS endpoint in tailnets with HTTPS disabled (#14538)	11 months ago
services.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
services_test.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
settings.go	cmd/{k8s-operator,containerboot},kube: ensure egress ProxyGroup proxies don't terminate while cluster traffic is still routed to them (#14436)	10 months ago
tailscaled.go	cmd/containerboot,cmd/k8s-operator: reload tailscaled config (#14342)	11 months ago
test_tailscale.sh	cmd/containerboot: make a tests table, add more tests.	3 years ago
test_tailscaled.sh	cmd/containerboot: avoid leaking bash scripts after test runs	2 years ago