Tink vs Amazon VPC CNI
Amazon VPC CNI is EKS's default CNI. It also exposes aws-node, IPAMD, and ENI gauges for Prometheus. That is not a mechanic. Tink installs in one command, watches the Linux server, explains what is wrong, and helps you fix it.
Amazon VPC CNI scrapes ENIs. Tink answers “why is this VPS sick?”
Accidental sysadmins land on Amazon VPC CNI because every EKS getting-started guide ships aws-node. Then the volume fills, nginx dies, and Grafana still shows assigned IPs — no PromQL matched host fill. A filling /var is a Tink warning; it is not an IPAMD job unless the ENI pool itself is the failure.
Tink is the other job: detect the issue on the machine, say why it happened in plain English, propose the command, and run it only after you approve. Keep scraping Amazon VPC CNI if you already operate EKS and need CNI SLOs. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | Amazon VPC CNI |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours — aws-node DaemonSet, IPAMD warm pool, prefix delegation, security groups for pods, and prometheus.yml scrape |
| What you get | Working monitoring, diagnosis, and approved fixes | A CNI scrape target. Host disk fill, nginx, Postgres, and certs stay your problem until PromQL fires and you SSH in |
| Pricing | Free (Scout) / $9 / $29 per machine per month | Open-source (Apache 2.0). You still pay EKS nodes, ENI/IP quotas, Prometheus, Grafana, and the engineer who owns IPAMD |
| Hidden costs | None — fully managed | ENI exhaustion, prefix-delegation surprises, SNAT hairpins, aws-node CrashLoops, and a second tool to tell you the box is sick |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | awscni_assigned_ip_addresses and ipamd gauges. Amazon VPC CNI does not watch host fill or a quiet cert unless you added another exporter |
| Configuration | None after install — heuristics and AI | WARM_ENI_TARGET, WARM_IP_TARGET, prefix delegation, pod ENI, and which PromQL actually pages you |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | You graph awscni_eni_allocated in Grafana, then SSH in to change the box |
| Fix execution | Proposes and executes approved commands with an audit trail | Metrics only — Amazon VPC CNI cannot free disk, restart nginx, or rotate a cert |
| Alerting | Built-in across 8 channels | Not an Amazon VPC CNI job — Prometheus rules and Alertmanager have to fire |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Not an Amazon VPC CNI job — a CNI scrape does not forecast a quiet volume filling up |
| SSH brute-force detection | Built-in — parses auth.log every scan | Never — Amazon VPC CNI does not read auth.log, journald, or host firewall state |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Silence if the agent dies — unless you built an up{job="aws-node"} deadman check |
| Public status page | Shareable URL with 90-day history | None — Amazon VPC CNI has no customer-facing status page |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | None — an ENI scrape target is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire Alertmanager into PagerDuty or another incident tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | kubectl and Grafana. No mechanic you text when /var filled and aws-node still showed IPs |
| Learning curve | None — works after install | Steep — IPAMD, ENI limits, prefix delegation, security groups for pods, PromQL, and which assigned-IP counter actually pages |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Teams that already run EKS and need VPC CNI scrapes, not a sick-VPS mechanic |
When Amazon VPC CNI metrics are the right choice
Keep scraping Amazon VPC CNI when you already want that exact job:
- EKS CNI SLOs — you need ENI allocation, IPAMD warm pool, and prefix-delegation counters, not a mechanic.
- Pod IP density at cluster scale — security groups for pods and WARM_IP_TARGET matter more than host nginx, certs, and SSH on a quiet VPS.
- An existing Prometheus + Grafana stack — aws-node already clusters, IPAMD already scrapes, and someone owns ENI quotas.
- Hosts that only page on Amazon VPC CNI — you already run exporters and PromQL, not a sick-box SSH loop.
The real cost of “just scrape Amazon VPC CNI”
Amazon VPC CNI is a serious EKS CNI. A working ops loop for five Linux boxes is not:
- A healthy awscni_assigned_ip_addresses still means you SSH in and change the box by hand
- Host fill, nginx, certs, and SSH brute-force never appear unless Prometheus scraped those signals and a rule fired
- A filling /var is a Tink disk warning on every scan — Amazon VPC CNI will stay quiet until the ENI pool itself is the failure
- A single VPS with a dead aws-node still needs a mechanic, not another CNI scrape
For a 5-server team, Tink Mechanic at $45/month is cheaper than Amazon VPC CNI plus the engineer who keeps Prometheus scrapes and IPAMD warm-pool rules alive, and every scan includes a diagnosis a quiet Grafana board will not type.
No ENI homework. No silent host. One command install.
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