From d3e770254de0bb301815ca87257c8b1a357d06c4 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Sun, 26 Apr 2026 21:02:47 +0800
Subject: hehe

---
 README.txt | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 README.txt

(limited to 'README.txt')

diff --git a/README.txt b/README.txt
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+=============================================================================
+ Local K8s LLM demo — kind + OpenTofu + vLLM
+=============================================================================
+
+sudo dnf install -y podman git make jq curl tar
+
+# kind v0.31.0 (node image: kindest/node:v1.35.0, pinned by digest in cluster/kind-config.yaml)
+cluster/kind-config.yaml
+
+# kubectl v1.36.0
+curl -fsSLo /tmp/kubectl \
+  https://dl.k8s.io/release/v1.36.0/bin/linux/amd64/kubectl
+sudo install -m 0755 /tmp/kubectl /usr/local/bin/kubectl
+
+# Helm 4.1.4
+terraform/modules/observability/variables.tf
+
+# OpenTofu 1.11.6
+terraform/envs/{dev,prod,bootstrap}/versions.tf
+
+
+
+# kind runs each k8s "node" as a long-lived podman container. The default pids_limit = 2048 causes ingress-nginx to hit pthread EAGAIN once the control plane warms up. Raise it once, then restart podman:
+sudo mkdir -p /etc/containers/containers.conf.d
+printf '[containers]\npids_limit = 0\n' \
+  | sudo tee /etc/containers/containers.conf.d/99-kind-pids.conf
+sudo systemctl restart podman.socket podman 2>/dev/null || true
+
+
+make help  # will have self explaantory commands to coopy adn paste stuff with
+
+
+
+# Expose an OpenAI-compatible endpoint through a K8s Service / Ingress and prove it works with a `curl` example in the README.
+
+http://llm.dev.localtest.me:8080
+$curl http://llm.dev.localtest.me:8080/v1/chat/completions -H 'Content-Type: application/json' -d '{"model":"Qwen2.5-0.5B-Instruct","messages":[{"role":"user","content":"hi"}],"max_tokens":8}' | jq
+
+http://llm.prod.localtest.me:8080
+$curl http://llm.prod.localtest.me:8080/v1/chat/completions -H 'Content-Type: application/json' -d '{"model":"Qwen2.5-1.5B-Instruct","messages":[{"role":"user","content":"hi"}],"max_tokens":8}' | jq
+
+
+# Observability: scrape `/metrics` from the inference pod with Prometheus and show at least one dashboard or PromQL query for request latency and GPU/CPU utilization.
+
+Fire 10 chat requests against dev to populate metrics
+$for i in {1..10}; do curl -s http://llm.dev.localtest.me:8080/v1/chat/completions -H 'Content-Type: application/json' -d '{"model":"Qwen2.5-0.5B-Instruct","messages":[{"role":"user","content":"hi"}],"max_tokens":4}' >/dev/null & done; wait
+
+Raw /metrics (vLLM exposes natively)
+$curl -s http://llm.dev.localtest.me:8080/metrics | grep '^vllm:' | head
+
+Request latency p95 (seconds) — via Prometheus
+$curl -G http://prom.localtest.me:8080/api/v1/query --data-urlencode 'query=histogram_quantile(0.95, sum by (le) (rate(vllm:e2e_request_latency_seconds_bucket[5m])))' | jq .data.result
+
+CPU cores in use per vLLM pod (CPU-only inference — no GPU on this stack)
+$curl -G http://prom.localtest.me:8080/api/v1/query --data-urlencode 'query=sum by (pod) (rate(container_cpu_usage_seconds_total{namespace="llm-dev",pod=~"llm-llm-app.*",container!="",container!="POD"}[5m]))' | jq .data.result
+
+In-flight requests per pod (the same metric the prod HPA scales on)
+$curl -G http://prom.localtest.me:8080/api/v1/query --data-urlencode 'query=sum by (namespace, pod) (vllm:num_requests_running)' | jq .data.result
+
+
+# stretch 1
+deployed /agent/agent.py in a container to use the backend to caluclate the product of 2 nums
+$curl http://agent.localtest.me:8080/ask -H 'Content-Type: application/json' -d '{"question":"what is 17 * 23?"}'  # need to make up-agent first
+
+# stretch 2 
+horizontal pod scaling by counting total inflight requests, up to a total of 3 pods
+term1
+$(trap 'kill 0' INT; for i in {1..5}; do \
+    curl -s http://llm.prod.localtest.me:8080/v1/chat/completions \
+      -H 'Content-Type: application/json' \
+      -d '{"model":"Qwen2.5-1.5B-Instruct","messages":[{"role":"user","content":"hi"}],"max_tokens":32}' \
+      >/dev/null &
+  done; wait)
+term2
+$kubectl -n llm-prod get hpa -w  # better to use watch -n for this, -w is slow af
+
+# stretch 3
+image pinning — prod uses repo@sha256:<digest> (resolved via scripts/resolve-digests.sh);
+terraform/envs/prod/main.tf
+dev tracks :latest. The chart prefers digest over tag when both are set.
+
+#stretch 4
+smoke test
+charts/llm-app/templates/smoketest-job.yaml reruns after every install or upgrade
+just checks if the response has a content field, no functional thingummy, then passes it
+
+
+
+
+all stretch goals except atlantis git controlled thingummy cuz lazy setup locally or use github
-- 
cgit