66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
package metrics
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import (
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"log"
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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"libvirt.org/go/libvirt"
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)
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var (
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// Compute
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libvirtNodeCPUUsage = prometheus.NewDesc(
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prometheus.BuildFQName("libvirt", "node", "cpu_time_seconds_total"),
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"CPU usage of node",
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[]string{"cluster", "node", "thread"},
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nil)
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libvirtNodeMemoryUsageBytes = prometheus.NewDesc(
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prometheus.BuildFQName("libvirt", "node", "memory_usage_bytes"),
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"Memory usage of the node, in bytes.",
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[]string{"cluster", "node", "total"},
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nil)
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)
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func CollectNode(conn *libvirt.Connect, ch chan<- prometheus.Metric, hostname string) error {
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config, err := Config()
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if err != nil {
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log.Fatalf("Fail to read file: %v", err)
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}
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// Node
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node_info, err := conn.GetNodeInfo()
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if err != nil {
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return err
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}
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nodeCPU, _ := conn.GetCPUStats(int(libvirt.NODE_CPU_STATS_ALL_CPUS), 0) // rate(libvirt_node_cpu_time_seconds_total[10s]) * 100
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nodeMemory, _ := conn.GetMemoryStats(libvirt.NODE_MEMORY_STATS_ALL_CELLS, 0)
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ch <- prometheus.MustNewConstMetric(
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libvirtNodeCPUUsage,
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prometheus.CounterValue,
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float64(nodeCPU.Kernel+nodeCPU.User+nodeCPU.Iowait)/1e9, // From nsec to sec
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config.Section("").Key("id").String(),
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hostname,
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strconv.FormatInt(int64(node_info.Sockets*node_info.Cores*node_info.Threads), 10),
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)
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ch <- prometheus.MustNewConstMetric(
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libvirtNodeMemoryUsageBytes,
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prometheus.GaugeValue,
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float64(nodeMemory.Total-(nodeMemory.Buffers+nodeMemory.Free+nodeMemory.Cached))*1024,
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config.Section("").Key("id").String(),
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hostname,
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strconv.FormatInt(int64(nodeMemory.Total), 10),
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)
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return nil
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}
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func (e *LibvirtExporter) DescribeNode(ch chan<- *prometheus.Desc) {
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ch <- libvirtNodeCPUUsage
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ch <- libvirtNodeMemoryUsageBytes
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}
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