107 lines
2.7 KiB
Go
107 lines
2.7 KiB
Go
package apt
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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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"git.faercol.me/monitoring/sys-exporter/registry"
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"github.com/prometheus/client_golang/prometheus"
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"go.uber.org/zap"
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)
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type AptCollector struct {
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installedPackages int
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pendingUpdates int
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promExporter *prometheus.GaugeVec
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updateFreq time.Duration
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l *zap.SugaredLogger
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}
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func (c *AptCollector) Collect() interface{} {
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return nil
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}
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func (c *AptCollector) updateInstalledPackages() error {
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cmd := exec.Command("/usr/bin/apt", "list", "--installed")
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out, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("failed to run apt list: %w (%s)", err, string(out))
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}
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// remove the unstable interface warning
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c.installedPackages = len(strings.Split(strings.TrimSpace(string(out)), "\n")) - 3
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return nil
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}
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func (c *AptCollector) updatePendingUpdates() error {
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updateCmd := exec.Command("/usr/bin/apt", "update")
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out, err := updateCmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("failed to run apt update: %w (%s)", err, string(out))
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}
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listCmd := exec.Command("/usr/bin/apt", "list", "--upgradable")
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out, err = listCmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("failed to run apt list: %w (%s)", err, string(out))
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}
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// remove the unstable interface warning
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c.pendingUpdates = len(strings.Split(strings.TrimSpace(string(out)), "\n")) - 3
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return nil
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}
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func (c *AptCollector) update() error {
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if err := c.updateInstalledPackages(); err != nil {
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return fmt.Errorf("failed to update count of installed packages: %w", err)
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}
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if err := c.updatePendingUpdates(); err != nil {
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return fmt.Errorf("failed to update count of pending updates: %w", err)
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}
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c.promExporter.WithLabelValues("total").Set(float64(c.installedPackages))
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c.promExporter.WithLabelValues("updates").Set(float64(c.pendingUpdates))
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return nil
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}
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func (c *AptCollector) Run(ctx context.Context, l *zap.SugaredLogger) {
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c.l = l
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c.l.Debug("Initializing collector")
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if err := c.update(); err != nil {
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c.l.Errorf("Failed to init collector: %s\n", err)
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}
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for {
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select {
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case <-ctx.Done():
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c.l.Debug("Stopping collector")
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return
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case <-time.After(c.updateFreq):
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c.l.Debug("Updating collector")
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if err := c.update(); err != nil {
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c.l.Errorf("Failed to update collector: %s\n", err)
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}
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}
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}
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}
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func (c *AptCollector) PromCollector() prometheus.Collector {
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return c.promExporter
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}
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func New() *AptCollector {
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return &AptCollector{
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updateFreq: 30 * time.Minute,
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promExporter: prometheus.NewGaugeVec(prometheus.GaugeOpts{Namespace: "packages", Subsystem: "apt", Name: "packages_count", Help: "Count of apt packages"}, []string{"status"}),
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}
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}
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func init() {
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registry.R.MustRegisterCollector("packages.apt", New())
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}
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