2b7492ac59
Implements temperature monitoring in pulse-host-agent to support Docker-in-VM deployments where the sensor proxy socket cannot cross VM boundaries. Changes: - Create internal/sensors package with local collection and parsing - Add temperature collection to host agent (Linux only, best-effort) - Support CPU package/core, NVMe, and GPU temperature sensors - Update TEMPERATURE_MONITORING.md with Docker-in-VM setup instructions - Update HOST_AGENT.md to document temperature feature The host agent now automatically collects temperature data on Linux systems with lm-sensors installed. This provides an alternative path for temperature monitoring when running Pulse in a VM, avoiding the unix socket limitation. Temperature collection is best-effort and fails gracefully if lm-sensors is not available, ensuring other metrics continue to be reported. Related to #661
47 lines
1.5 KiB
Go
47 lines
1.5 KiB
Go
package sensors
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import (
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"context"
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"fmt"
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"os/exec"
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"strings"
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"time"
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)
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// CollectLocal reads sensor data from the local machine using lm-sensors.
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// Returns the raw JSON output from `sensors -j` or an error if sensors is not available.
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func CollectLocal(ctx context.Context) (string, error) {
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// Check if sensors command exists
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if _, err := exec.LookPath("sensors"); err != nil {
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return "", fmt.Errorf("lm-sensors not installed: %w", err)
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}
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// Create context with timeout
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cmdCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
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defer cancel()
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// Run sensors -j command
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// sensors exits non-zero when optional subfeatures fail; "|| true" keeps the JSON for parsing
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cmd := exec.CommandContext(cmdCtx, "sh", "-c", "sensors -j 2>/dev/null || true")
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output, err := cmd.Output()
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if err != nil {
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return "", fmt.Errorf("failed to execute sensors: %w", err)
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}
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outputStr := strings.TrimSpace(string(output))
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if outputStr == "" || outputStr == "{}" {
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// Try Raspberry Pi temperature method as fallback
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cmd = exec.CommandContext(cmdCtx, "cat", "/sys/class/thermal/thermal_zone0/temp")
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if rpiOutput, rpiErr := cmd.Output(); rpiErr == nil {
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rpiTemp := strings.TrimSpace(string(rpiOutput))
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if rpiTemp != "" {
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// Convert to pseudo-sensors format for compatibility
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// Raspberry Pi reports in millidegrees Celsius
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return fmt.Sprintf(`{"cpu_thermal-virtual-0":{"temp1":{"temp1_input":%s}}}`, rpiTemp), nil
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}
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}
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return "", fmt.Errorf("sensors returned empty output")
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}
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return outputStr, nil
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}
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