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ipn/store/kubestore,kube,envknob,cmd/tailscaled/depaware.txt: allow kubestore read/write custom TLS secrets (#15307)

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This PR adds some custom logic for reading and writing
kube store values that are TLS certs and keys:
1) when store is initialized, lookup additional
TLS Secrets for this node and if found, load TLS certs
from there
2) if the node runs in certs 'read only' mode and
TLS cert and key are not found in the in-memory store,
look those up in a Secret
3) if the node runs in certs 'read only' mode, run
a daily TLS certs reload to memory to get any
renewed certs

Updates tailscale/corp#24795

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
This commit is contained in:
Irbe Krumina
2025-03-18 15:09:22 +00:00
committed by GitHub
parent ef1e14250c
commit 34734ba635
8 changed files with 881 additions and 92 deletions
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10
envknob/envknob.go
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@@ -429,10 +429,16 @@ func App() string {
// is a shared cert available.
func IsCertShareReadOnlyMode() bool {
m := String("TS_CERT_SHARE_MODE")
return m == modeRO
return m == "ro"
}
const modeRO = "ro"
// IsCertShareReadWriteMode returns true if this instance is the replica
// responsible for issuing and renewing TLS certs in an HA setup with certs
// shared between multiple replicas.
func IsCertShareReadWriteMode() bool {
m := String("TS_CERT_SHARE_MODE")
return m == "rw"
}
// CrashOnUnexpected reports whether the Tailscale client should panic
// on unexpected conditions. If TS_DEBUG_CRASH_ON_UNEXPECTED is set, that's