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The v4 installer added mount entries for /run/pulse-sensor-proxy to LXC container configs. After upgrading to v5 and rebooting, /run (tmpfs) is wiped and the container fails to start. The installer now detects and removes these stale mp<N> and lxc.mount.entry references automatically when run on a PVE host, and the upgrade docs include manual fix steps.
123 lines
4.8 KiB
Markdown
123 lines
4.8 KiB
Markdown
# Temperature Monitoring
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Pulse can collect host temperatures in two supported ways:
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- Pulse agent on Proxmox hosts (recommended)
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- SSH-based collection from the Pulse server (fallback or for non-agent hosts)
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If you are upgrading from older releases that used `pulse-sensor-proxy`, see the legacy cleanup section below. The sensor proxy is no longer supported in Pulse.
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## Recommended: Pulse Agent (Proxmox)
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The unified agent runs on each Proxmox host and reports temperatures locally with no SSH keys needed.
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```bash
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curl -fsSL http://<pulse-ip>:7655/install.sh | \
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bash -s -- --url http://<pulse-ip>:7655 --token <api-token> --enable-proxmox
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```
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Notes:
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- Install `lm-sensors` on each host (`apt install lm-sensors && sensors-detect --auto`).
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- Temperatures appear automatically once the agent reports.
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## SSH-Based Collection (Fallback)
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Pulse can also collect temperatures by SSHing into each host and running `sensors -j`, with a fallback to `/sys/class/thermal/thermal_zone0/temp` when available (for example, on Raspberry Pi).
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### Requirements
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- SSH connectivity from the Pulse server to each host
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- `lm-sensors` installed and `sensors -j` returning JSON on the host
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- A restricted SSH key entry that only allows `sensors -j`
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### Setup
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1. Generate the node setup command from the UI:
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**Settings -> Proxmox -> Add Node**
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2. Run the command on each Proxmox host. The setup script can:
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- Create the required API user and permissions
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- Add a restricted SSH key entry for temperature collection
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- Install `lm-sensors` (optional)
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The SSH entry added to `authorized_keys` is restricted to `sensors -j`, for example:
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```text
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command="sensors -j",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty <public-key> # pulse-sensors
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```
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If you use a non-standard SSH port, set `SSH_PORT` (system-wide) or configure it in **Settings -> System**.
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### Containerized Pulse
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SSH-based collection from inside a container is not recommended for production. Prefer the agent method or run Pulse on the host. For dev/test, you can allow SSH from the container with:
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```bash
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PULSE_DEV_ALLOW_CONTAINER_SSH=true
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```
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### Verification
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From the Pulse server, verify that SSH and sensors output work:
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```bash
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ssh -i /path/to/key root@node "sensors -j"
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```
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For platforms that expose a thermal zone file:
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```bash
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ssh -i /path/to/key root@node "cat /sys/class/thermal/thermal_zone0/temp"
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```
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### Troubleshooting
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- If `sensors -j` returns empty output, run `sensors-detect --auto` and retry.
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- If temperatures show as unavailable, confirm the host actually exposes sensor data.
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- Ensure the SSH key entry is present and restricted to `sensors -j`.
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## Legacy Cleanup (If Upgrading)
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If you still have the old sensor proxy installed from prior releases, remove it from each **Proxmox host** (not the Pulse container):
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```bash
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# Stop and disable all sensor-proxy systemd units
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sudo systemctl disable --now pulse-sensor-proxy pulse-sensor-proxy-selfheal.timer pulse-sensor-proxy-selfheal.service pulse-sensor-cleanup.path pulse-sensor-cleanup.service 2>/dev/null
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# Remove systemd unit files
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sudo rm -f /etc/systemd/system/pulse-sensor-proxy.service
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sudo rm -f /etc/systemd/system/pulse-sensor-proxy-selfheal.timer
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sudo rm -f /etc/systemd/system/pulse-sensor-proxy-selfheal.service
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sudo rm -f /etc/systemd/system/pulse-sensor-cleanup.service
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sudo rm -f /etc/systemd/system/pulse-sensor-cleanup.path
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sudo systemctl daemon-reload
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# Remove sensor-proxy files
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sudo rm -rf /opt/pulse/sensor-proxy
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sudo rm -rf /etc/pulse-sensor-proxy
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sudo rm -rf /var/lib/pulse-sensor-proxy
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sudo rm -rf /var/log/pulse/sensor-proxy
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sudo rm -rf /run/pulse-sensor-proxy
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# Optional: remove sensor-proxy SSH keys from authorized_keys
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sudo sed -i '/# pulse-managed-key$/d;/# pulse-proxy-key$/d' /root/.ssh/authorized_keys
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```
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Reinstalling or upgrading the Pulse container does **not** remove the sensor proxy from the host — they are separate installations. If you skip this cleanup, the selfheal timer will keep running and may generate recurring `TASK ERROR` entries in the Proxmox task log.
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### LXC Container Config Cleanup
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The v4 installer also added mount entries for `/run/pulse-sensor-proxy` to the LXC container config (`/etc/pve/lxc/<ctid>.conf`). After a host reboot, `/run` is cleared and the mount source no longer exists, which prevents the container from starting. To check for and remove stale entries:
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```bash
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# Check for stale sensor-proxy mount entries
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grep -n 'pulse-sensor-proxy' /etc/pve/lxc/*.conf
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# Remove mp<N> entries (container must be stopped)
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# Replace mp0 with the actual key shown in the grep output (mp0, mp1, etc.)
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pct set <ctid> -delete mp0
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# Remove lxc.mount.entry lines
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sed -i '/lxc\.mount\.entry:.*pulse-sensor-proxy/d' /etc/pve/lxc/<ctid>.conf
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```
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Re-running the Pulse installer on the Proxmox host also performs this cleanup automatically.
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