rcourtman
23bf99e1ba
## Problem
Saving anything on Alerts > Thresholds turned flapping detection and
alert TTL cleanup off. The page's `PUT /api/alerts/config` body never
carries `flappingEnabled`, `maxAlertAgeDays`, `maxAcknowledgedAgeDays`,
`autoAcknowledgeAfterHours` or `customRules` (the page has no control
for any of them). `UpdateAlertConfig` decoded the body into a zero
`AlertConfig`, so every save wrote `false`/`0` for those fields, reset
the flapping tuning to defaults, dropped custom rules, and persisted
that. The `flapping`, `aggregation` and `ioNormalization` objects the
page sends are not `AlertConfig` fields and never enabled anything.
## Fix
- `PUT /api/alerts/config` now replaces only the top-level keys the body
carries. A key left out keeps its stored value. A sent key replaces its
setting whole, so `"overrides": {}` still clears overrides, and the
usual normalization still runs. A body that is not a JSON object
(including `null`) is a 400 and changes nothing.
- `alertconfig.ApplyAlertConfigUpdate` decodes the body on its own, so
sent keys get exact `encoding/json` semantics, including duplicates and
case-folded keys. It copies every unsent top-level field from a JSON
clone of the stored config.
- `Manager.ApplyConfigUpdate` reads, merges and applies under the
manager lock, so concurrent partial saves cannot revert each other. It
returns an owned snapshot, which the handler persists, so
`SaveAlertConfig`'s in-place normalization no longer writes into the
live config's maps. The handler runs one save at a time, so successful
saves reach `alerts.json` in the order they were applied.
- Stored configs are not rewritten; a value an earlier save zeroed stays
as it is.
## Verification
- Unit: `internal/alerts/config/update_test.go`; manager save path and
concurrent partial updates in
`internal/alerts/config_validation_test.go`; handler against a real
manager in `internal/api/alerting/alerts_test.go`. Each new regression
fails against main's code (overlay negative controls). The concurrency
test fails at round 0 against a non-atomic variant.
- `go test ./internal/alerts/... ./internal/api/alerting/` and the
`internal/api` alert endpoint, tenant and scope tests pass; the alert
tests pass under `-race`.
- Private stack (mock mode, Vite on main's frontend):
- On main, a node CPU change saved from the Thresholds page took
flapping and all three TTLs to false/0, in memory and in `alerts.json`.
- With this change, the same UI save kept them (true/7/1/24) and stored
the new threshold.
- The API repro (GET, drop the four keys, PUT) keeps them; explicit
`false`/`0` still applies; `null` and `[]` return 400.
- Five rounds of concurrent partial PUTs kept both changes in memory and
on disk.
## Follow-ups
- The thresholds page still sends the dead
`flapping`/`aggregation`/`ioNormalization` objects and hard-coded
`minimumDelta`/`suppressionWindow`/`hysteresisMargin`. A frontend
cleanup will follow once the open PRs touching
`alertsConfigurationModel.ts` land.
- `SaveAlertConfig` still normalizes caller-owned maps in place for
other callers (`ActivateAlerts`, startup paths), and the GET handler
encodes a shallow copy. That pre-existing race is tracked separately.
Pulse
Real-time Proxmox, Docker and Kubernetes monitoring that finds what needs attention.
Pulse is a self-hosted monitoring workspace for Proxmox, Docker, Kubernetes, TrueNAS, physical and virtual machines, and early-access VMware vSphere environments. It combines live infrastructure state, history, alerts, recovery visibility, and scheduled health checks without requiring a conventional enterprise monitoring stack.
Why Pulse
- It watches between visits. Alerts and Pulse Patrol find failed backups, capacity pressure, restart loops, unhealthy containers, clock drift, and other problems that dashboards cannot surface when nobody is looking.
- It keeps each platform familiar. Proxmox, Docker, Kubernetes, TrueNAS, vSphere, and machines have dedicated views, backed by one shared resource model for search, alerts, history, and investigation.
- It stays operator-controlled. Credentials are encrypted at rest, API tokens are scoped, agent commands are disabled by default, and governed fixes require the configured policy and approval path.
Platform coverage
| Platform | Coverage |
|---|---|
| Proxmox VE, PBS, and PMG | Nodes, guests, storage, backups, replication, Ceph, mail gateways, and alerts |
| Docker and Podman | Hosts, containers, Compose projects, Swarm services, health, images, and updates |
| Kubernetes | Clusters, nodes, workloads, pods, services, storage, and events through the unified agent |
| TrueNAS SCALE and CORE | Pools, datasets, disks, snapshots, replication tasks, apps, VMs, and alerts |
| Linux, Windows, and macOS machines | Host health, filesystems, networking, temperatures, RAID, and availability through the unified agent |
| VMware vSphere | Early-access inventory, hosts, clusters, VMs, datastores, networks, snapshots, and recovery context; validate against your own vCenter before production use |
Platform pages keep storage and recovery information beside the infrastructure it belongs to. Alerts, Actions, and Patrol remain cross-platform views.
Patrol: monitoring that does rounds
Pulse Patrol runs scheduled checks across the current state and recent history of your infrastructure. Community installations can use a local model or their own AI provider for watch-only analysis. Pulse Pro adds investigation and policy-bound fixes with approval, verification, and an audit trail.
Pulse also includes an interactive Assistant and an MCP adapter for external clients such as Claude Code and OpenCode. Both sit on top of the same scoped inventory, metrics, alert, storage, and governed-action contracts.
Quick start
Choose an exact version from the latest release and keep that version pinned during installation.
Docker
docker run -d \
--name pulse \
-p 7655:7655 \
-v pulse_data:/data \
-e PULSE_DEPLOYMENT_METHOD=docker_run \
--restart unless-stopped \
rcourtman/pulse:vX.Y.Z
Open http://<your-ip>:7655 and follow the bootstrap-token setup. Docker host
monitoring is provided by the unified agent; the Pulse server container does
not need the Docker socket.
Proxmox LXC, Linux, and Kubernetes
The installer is signed. Verify install.sh against the pinned
pulse-installer key before running it:
export PULSE_VERSION=vX.Y.Z
curl -fsSLO "https://github.com/rcourtman/Pulse/releases/download/${PULSE_VERSION}/install.sh" &&
curl -fsSLO "https://github.com/rcourtman/Pulse/releases/download/${PULSE_VERSION}/install.sh.sshsig" &&
ssh-keygen -Y verify \
-f <(printf '%s\n' 'pulse-installer namespaces="pulse-install" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMZd/DaH+BldzOkq1A8KVTcFk73nAyrE8aJOyf7i00jm pulse-installer') \
-I pulse-installer \
-n pulse-install \
-s install.sh.sshsig < install.sh &&
bash install.sh --version "${PULSE_VERSION}"
Paste the whole block: installation stops if either download or signature verification fails. Do not run the final command separately to bypass a failure.
The GitHub installer installs the Pulse server. Install and upgrade agents (including v5-to-v6 agent upgrades) with the per-host command generated under Settings → Infrastructure → Install on a host.
Do you need an agent?
Often not. Proxmox VE, PBS, and PMG are monitored through the Proxmox API with a read-only token, so nothing runs on the host and the generated setup script creates a privilege-separated monitoring user. Install the unified agent only where you want data the platform API cannot provide, such as host SMART health, temperatures, Docker hosts, or standalone machines.
The agent is operator-controlled by design. Command execution is off by
default, the local listener binds to localhost, and generated systemd units
ship hardened. On Linux, the installer's --least-privilege profile runs the
service as a dedicated non-root user, with optional scoped sudo grants for
the few collectors that need elevation. The
agent security model documents exactly what the
agent can and cannot do at each privilege level.
Important
GitHub release assets and
rcourtman/pulseimages are Community builds. Relay, Pro, and eligible legacy customers should use the private image or Linux archive provided by the Pulse download portal. Replacing a private Pro runtime with a public Community build removes its private runtime hooks.
Editions
- Community — self-hosted monitoring, seven days of metric history, core SSO, update alerts, and Patrol with your own provider or local model.
- Pro — Community plus Patrol investigation, governed fixes, ninety days of history, centralized agent profiles, RBAC, audit logging, and reporting.
- MSP — for managed service providers: one Pulse Account running many client workspaces, each with an isolated Pulse runtime — separate dashboards, alerts, users, audit history, and reports. Free sixty-day two-client evaluation at Pulse for MSPs.
Relay is no longer sold. Existing Relay subscribers receive Pro features at their current price for as long as their subscription continues. Existing paired phones keep working until 31 March 2027. Relay connects the app, not the web UI. Use your own VPN or tunnel for remote web access. For phone alerts, add an ntfy, Gotify or Pushover destination and open Pulse in your phone's browser.
Core self-hosted monitoring is not gated by monitored-system or child-resource volume. See the runtime-aligned capability reference and current plans for details.
Documentation
- Install and deployment
- Production deployment and security
- Upgrade from Pulse v5
- Releases and update channels
- Configuration
- Platform and agent guides
- Pulse Intelligence
- Security and privacy
- Code signing policy
- Troubleshooting
- API reference and architecture
Localized getting started guides: Deutsch · Español
Development
Pulse uses Go 1.26 and a SolidJS/TypeScript frontend. The managed development
runtime starts the frontend at http://127.0.0.1:5173 and proxies API and
WebSocket traffic to the backend on port 7655.
npm ci
npm --prefix frontend-modern ci
npm run dev
Useful checks:
go test ./...
npm --prefix frontend-modern test
npm --prefix frontend-modern run type-check
python3 scripts/check_public_docs.py
See CONTRIBUTING.md before investing in a code change. Pulse uses an issue-first contribution process and does not normally accept unsolicited pull requests.
Community and support
- Ask questions in GitHub Discussions.
- Report reproducible bugs through GitHub Issues.
- Home Assistant users can use the community-maintained Pulse add-ons.
- If Pulse is useful to you, support its development through GitHub Sponsors or Ko-fi.
License
Everything in this repository is licensed under the MIT License. There is no dual licensing and no commercial or source-available code here.
Pulse Pro is a separate commercial product, built from private sources and distributed through pulserelay.pro. Its use is governed by the Terms of Service, which apply to that product only, not to anything in this repository.