fix(e2e): fix cross-node networking in Kind cluster#29
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Three fixes for the E2E dial tcp :9090 i/o timeout (#28): 1. Label operator namespace with vinyl.bluedynamics.eu/operator-namespace=true so the agent NetworkPolicy allows traffic from the operator. Since Kind v0.24.0, kindnet enforces NetworkPolicies — without this label, agent port 9090 is blocked. 2. Enable TCP MTU probing (sysctl net.ipv4.tcp_mtu_probing=1) before creating the Kind cluster. GitHub Actions runners often have MTU < 1500 due to VXLAN encapsulation, and kindnet's MTU auto-detection is broken (always picks 1500). This causes silent packet drops on cross-node traffic. 3. Add explicit 30s timeout to the agent HTTP client. The Go default http.Client has no timeout, causing goroutines to hang indefinitely on unreachable agents instead of failing fast and retrying. Fixes #28 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Three fixes for the E2E
dial tcp :9090 i/o timeout(#28):1. Namespace label for NetworkPolicy
Label the operator namespace with
vinyl.bluedynamics.eu/operator-namespace=true. Since Kind v0.24.0, kindnet enforces NetworkPolicies viakube-network-policies. The agent NetworkPolicy only allows ingress from namespaces with this label — without it, port 9090 is blocked.2. TCP MTU probing
sudo sysctl -w net.ipv4.tcp_mtu_probing=1before Kind cluster creation. GitHub Actions runners often have MTU < 1500 (VXLAN overhead), but kindnet's MTU detection is broken (kind #3940) — always sets 1500, causing silent packet drops on cross-node traffic.3. Agent HTTP client timeout
Add explicit
30stimeout to the Gohttp.Clientvia--agent-client-timeoutflag. Without this, the default client has no timeout, causing goroutines to hang indefinitely on unreachable agents.Fixes #28
Test plan
go build ./...clean🤖 Generated with Claude Code