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Kubernetes components understanding: Kube-proxy [1]
EndpointSliceCache This struct stores the simplified information about endpointslices. First keyed by svc name and secondly keyed by endpointslice name, the stored value is endpoint struct defined by kube-proxy The key component is endpointSliceTracker, it stores all the applied and pending endpoint slice in memory and will be used to update the changes. The changes…
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Start/stop instance on AWS using Lambda
prerequisites Since the free tier is going to end at the end of Janauray, to save the cost for myself, I decided to only start instance on business hours(09:00-18:00) of the day. Component Details The architecture is simple: What I need to prepare in advance is the lambda code bundle and the IAM role which…
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DNS pollution learning from V2Ray: take GFW as an example
Usually Cloud provider’s DNS resolution can resolve domain to IP outside China. But GFW will catch such traffic and redirect such DNS query to a wrong IP address to make access to International forbidden. This can be realized because dns query is just UDP, just send/receive. Capture and fake one response is relatively simple. The…