Tink vs OpenNebula
OpenNebula is a private-cloud orchestrator. That is not a mechanic. Tink installs in one command, watches the Linux host, explains what is wrong, and helps you fix it.
OpenNebula runs the guest. Tink answers “why is this VPS sick?”
Accidental sysadmins land on OpenNebula because a Sunstone console looks like ops. Then the volume fills, guest nginx dies, and onevm list still shows RUNNING — no host alarm matched guest fill. A filling /var is a Tink warning; it is not an OpenNebula job unless you scraped hook scripts and watched them.
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 using OpenNebula if you already run private-cloud clusters. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | OpenNebula |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours — front-end, KVM hosts, datastores, then a guest that still has no mechanic after onevm list stays RUNNING |
| What you get | Working monitoring, diagnosis, and approved fixes | A private-cloud orchestrator. Disk fill, guest nginx, Postgres, and certs stay your problem until you SSH in |
| Pricing | Free (Scout) / $9 / $29 per machine per month | OpenNebula is Apache-licensed. You still pay the engineer who owns the front-end after the last VM stays RUNNING |
| Hidden costs | None — fully managed | A quiet qcow2 at 2am, a filling datastore, and a second tool to tell you the Linux guest is sick while onevm still shows RUNNING |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | Guest lifecycle and host probes. OpenNebula does not watch a quiet cert or guest auth.log after the VM started |
| Configuration | None after install — heuristics and AI | Clusters, hosts, datastores, Sunstone, and which guest death actually pages you |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | You read onevm list, then SSH in to change the Linux guest the orchestrator already sits under |
| Fix execution | Proposes and executes approved commands with an audit trail | Start and stop guests only — OpenNebula cannot free guest disk, rotate a cert, or stop SSH brute-force unless you wrote that runbook |
| Alerting | Built-in across 8 channels | Not an OpenNebula job — hook scripts plus a separate monitoring tool have to fire |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Not an OpenNebula job — a green RUNNING VM does not forecast a quiet volume filling up |
| SSH brute-force detection | Built-in — parses auth.log every scan | Never — OpenNebula does not read guest auth.log, journald, or firewall state after the VM started |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Silence if the guest dies after the last onehost poll — unless you built a separate uptime check |
| Public status page | Shareable URL with 90-day history | None — OpenNebula has no customer-facing status page for the Linux guest |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | None — a onevm recap is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire failed guests into PagerDuty or another incident tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | onevm and Sunstone. No mechanic you text when /var filled and the last VM still showed RUNNING |
| Learning curve | None — works after install | Steep — front-end, datastores, transfer manager, and which host failure is the hypervisor vs the running guest |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Teams that already run OpenNebula clusters and need a private cloud, not a sick-VPS mechanic |
When OpenNebula is the right choice
Keep using OpenNebula when you already want that exact job:
- Private-cloud clusters — you need a front-end, datastores, and a onevm inventory, not a mechanic.
- An existing OpenNebula estate — hosts, Sunstone, and isolation matter more than guest nginx, certs, and SSH on a quiet VPS.
- An existing lab or nested setup — guests already start, the orchestrator already ships, and someone owns the transfer manager.
- Hosts that only page on failed guests — you already run hook scripts and exporters, not a sick-box SSH loop.
The real cost of “just watch onevm list”
OpenNebula runs guests. A working ops loop for five Linux boxes is not:
- A RUNNING guest still means you SSH in and change the box by hand when it gets sick later
- Guest fill, nginx, certs, and SSH brute-force never appear unless a separate tool scraped those signals and a rule fired
- A filling /var is a Tink disk warning on every scan — OpenNebula will stay quiet until the next guest process dies
- A single VPS with a dead agent still needs a mechanic, not another onevm row
For a 5-server team, Tink Mechanic at $45/month is cheaper than an OpenNebula front-end plus the engineer who keeps failed-guest notifications alive, and every scan includes a diagnosis a quiet onehost poll will not type.
No hypervisor homework. No silent host. One command install.
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