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cmd/{containerboot,k8s-operator},kube/kubetypes: kube Ingress L7 proxies only advertise HTTPS endpoint when ready (#14171)

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cmd/containerboot,kube/kubetypes,cmd/k8s-operator: detect if Ingress is created in a tailnet that has no HTTPS

This attempts to make Kubernetes Operator L7 Ingress setup failures more explicit:
- the Ingress resource now only advertises HTTPS endpoint via status.ingress.loadBalancer.hostname when/if the proxy has succesfully loaded serve config
- the proxy attempts to catch cases where HTTPS is disabled for the tailnet and logs a warning

Updates tailscale/tailscale#12079
Updates tailscale/tailscale#10407

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
This commit is contained in:
Irbe Krumina
2024-12-04 12:00:04 +00:00
committed by GitHub
parent aa43388363
commit 2aac916888
12 changed files with 448 additions and 133 deletions
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15
kube/kubetypes/metrics.go → kube/kubetypes/types.go
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@@ -27,4 +27,19 @@ const (
MetricEgressServiceCount = "k8s_egress_service_resources"
MetricProxyGroupEgressCount = "k8s_proxygroup_egress_resources"
MetricProxyGroupIngressCount = "k8s_proxygroup_ingress_resources"
// Keys that containerboot writes to state file that can be used to determine its state.
// fields set in Tailscale state Secret. These are mostly used by the Tailscale Kubernetes operator to determine
// the state of this tailscale device.
KeyDeviceID string = "device_id" // node stable ID of the device
KeyDeviceFQDN string = "device_fqdn" // device's tailnet hostname
KeyDeviceIPs string = "device_ips" // device's tailnet IPs
KeyPodUID string = "pod_uid" // Pod UID
// KeyCapVer contains Tailscale capability version of this proxy instance.
KeyCapVer string = "tailscale_capver"
// KeyHTTPSEndpoint is a name of a field that can be set to the value of any HTTPS endpoint currently exposed by
// this device to the tailnet. This is used by the Kubernetes operator Ingress proxy to communicate to the operator
// that cluster workloads behind the Ingress can now be accessed via the given DNS name over HTTPS.
KeyHTTPSEndpoint string = "https_endpoint"
ValueNoHTTPS string = "no-https"
)