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make enabled collectors configurable (based on code from node_exporter)

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This commit is contained in:
Martin Lindhe
2016-09-01 16:04:43 +02:00
parent 2af46d9313
commit d8f62e07c2
5 changed files with 206 additions and 131 deletions
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51
collector/os.go
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@@ -10,6 +10,10 @@ import (
"github.com/prometheus/client_golang/prometheus"
)
func init() {
Factories["os"] = NewOSCollector
}
// A OSCollector is a Prometheus collector for WMI Win32_OperatingSystem metrics
type OSCollector struct {
PhysicalMemoryFreeBytes *prometheus.Desc
@@ -25,105 +29,92 @@ type OSCollector struct {
}
// NewOSCollector ...
func NewOSCollector() *OSCollector {
func NewOSCollector() (Collector, error) {
const subsystem = "os"
return &OSCollector{
PagingMaxBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "paging_max_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "paging_max_bytes"),
"SizeStoredInPagingFiles",
nil,
nil,
),
PagingFreeBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "paging_free_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "paging_free_bytes"),
"FreeSpaceInPagingFiles",
nil,
nil,
),
PhysicalMemoryFreeBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "physical_memory_free_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "physical_memory_free_bytes"),
"FreePhysicalMemory",
nil,
nil,
),
Processes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "processes"),
prometheus.BuildFQName(Namespace, subsystem, "processes"),
"NumberOfProcesses",
nil,
nil,
),
ProcessesMax: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "processes_max"),
prometheus.BuildFQName(Namespace, subsystem, "processes_max"),
"MaxNumberOfProcesses",
nil,
nil,
),
ProcessMemoryMaxBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "process_memory_max_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "process_memory_max_bytes"),
"MaxProcessMemorySize",
nil,
nil,
),
Users: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "users"),
prometheus.BuildFQName(Namespace, subsystem, "users"),
"NumberOfUsers",
nil,
nil,
),
VirtualMemoryBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "virtual_memory_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "virtual_memory_bytes"),
"TotalVirtualMemorySize",
nil,
nil,
),
VisibleMemoryBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "visible_memory_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "visible_memory_bytes"),
"TotalVisibleMemorySize",
nil,
nil,
),
VirtualMemoryFreeBytes: prometheus.NewDesc(
prometheus.BuildFQName(wmiNamespace, "os", "virtual_memory_free_bytes"),
prometheus.BuildFQName(Namespace, subsystem, "virtual_memory_free_bytes"),
"FreeVirtualMemory",
nil,
nil,
),
}
}, nil
}
// Collect sends the metric values for each metric
// to the provided prometheus Metric channel.
func (c *OSCollector) Collect(ch chan<- prometheus.Metric) {
func (c *OSCollector) Collect(ch chan<- prometheus.Metric) error {
if desc, err := c.collect(ch); err != nil {
log.Println("[ERROR] failed collecting os metrics:", desc, err)
return
return err
}
}
// Describe sends the descriptors of each metric over to the provided channel.
// The corresponding metric values are sent separately.
func (c *OSCollector) Describe(ch chan<- *prometheus.Desc) {
ch <- c.PhysicalMemoryFreeBytes
ch <- c.PagingFreeBytes
ch <- c.VirtualMemoryFreeBytes
ch <- c.ProcessesMax
ch <- c.ProcessMemoryMaxBytes
ch <- c.Processes
ch <- c.Users
ch <- c.PagingMaxBytes
ch <- c.VirtualMemoryBytes
ch <- c.VisibleMemoryBytes
return nil
}
type Win32_OperatingSystem struct {