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Remove config option, percent option always activated. Fix review issues

This commit is contained in:
Mike Tonks 2016-02-11 10:49:48 +00:00
parent 7c20522a30
commit 7587dc350e
3 changed files with 65 additions and 110 deletions
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8
plugins/inputs/docker/README.md
View File

@ -22,16 +22,8 @@ for the stat structure can be found
endpoint = "unix:///var/run/docker.sock"
# Only collect metrics for these containers, collect all if empty
container_names = []
calculate_percentages = false
```
### Calculate Percentages
Optionally percentages can be calculated for cpu and memory usage. This uses
the same calculation as the 'docker stats' command line tool. Set this option
to 'true' to enable this feature.
### Measurements & Fields:
Every effort was made to preserve the names based on the JSON response from the

37
plugins/inputs/docker/docker.go
View File

@ -14,9 +14,8 @@ import (
)
type Docker struct {
Endpoint string
ContainerNames []string
CalculatePercentages bool
Endpoint string
ContainerNames []string
client *docker.Client
}
@ -28,8 +27,6 @@ var sampleConfig = `
endpoint = "unix:///var/run/docker.sock"
# Only collect metrics for these containers, collect all if empty
container_names = []
# Add calculated percentages for mem and cpu, as per 'docker stats' command
calculate_percentages = false
`
func (d *Docker) Description() string {
@ -135,7 +132,7 @@ func (d *Docker) gatherContainer(
tags[k] = v
}
gatherContainerStats(stat, acc, tags, d.CalculatePercentages)
gatherContainerStats(stat, acc, tags)
return nil
}
@ -144,7 +141,6 @@ func gatherContainerStats(
stat *docker.Stats,
acc telegraf.Accumulator,
tags map[string]string,
calculate_percentages bool,
) {
now := stat.Read
@ -182,9 +178,7 @@ func gatherContainerStats(
"pgfault": stat.MemoryStats.Stats.Pgfault,
"inactive_file": stat.MemoryStats.Stats.InactiveFile,
"total_pgpgin": stat.MemoryStats.Stats.TotalPgpgin,
}
if calculate_percentages {
memfields["usage_percent"] = float64(stat.MemoryStats.Usage) / float64(stat.MemoryStats.Limit) * 100.0
"usage_percent": calculateMemPercent(stat),
}
acc.AddFields("docker_mem", memfields, tags, now)
@ -196,9 +190,7 @@ func gatherContainerStats(
"throttling_periods": stat.CPUStats.ThrottlingData.Periods,
"throttling_throttled_periods": stat.CPUStats.ThrottlingData.ThrottledPeriods,
"throttling_throttled_time": stat.CPUStats.ThrottlingData.ThrottledTime,
}
if calculate_percentages {
cpufields["usage_percent"] = calculateCPUPercent(stat)
"usage_percent": calculateCPUPercent(stat),
}
cputags := copyTags(tags)
cputags["cpu"] = "cpu-total"
@ -230,14 +222,19 @@ func gatherContainerStats(
gatherBlockIOMetrics(stat, acc, tags, now)
}
func calculateMemPercent(stat *docker.Stats) float64 {
var memPercent = 0.0
if stat.MemoryStats.Limit > 0 {
memPercent = float64(stat.MemoryStats.Usage) / float64(stat.MemoryStats.Limit) * 100.0
}
return memPercent
}
func calculateCPUPercent(stat *docker.Stats) float64 {
var (
cpuPercent = 0.0
// calculate the change for the cpu usage of the container in between readings
cpuDelta = float64(stat.CPUStats.CPUUsage.TotalUsage) - float64(stat.PreCPUStats.CPUUsage.TotalUsage)
// calculate the change for the entire system between readings
systemDelta = float64(stat.CPUStats.SystemCPUUsage) - float64(stat.PreCPUStats.SystemCPUUsage)
)
var cpuPercent = 0.0
// calculate the change for the cpu and system usage of the container in between readings
cpuDelta := float64(stat.CPUStats.CPUUsage.TotalUsage) - float64(stat.PreCPUStats.CPUUsage.TotalUsage)
systemDelta := float64(stat.CPUStats.SystemCPUUsage) - float64(stat.PreCPUStats.SystemCPUUsage)
if systemDelta > 0.0 && cpuDelta > 0.0 {
cpuPercent = (cpuDelta / systemDelta) * float64(len(stat.CPUStats.CPUUsage.PercpuUsage)) * 100.0

130
plugins/inputs/docker/docker_test.go
View File

@ -18,7 +18,7 @@ func TestDockerGatherContainerStats(t *testing.T) {
"cont_name": "redis",
"cont_image": "redis/image",
}
gatherContainerStats(stats, &acc, tags, false)
gatherContainerStats(stats, &acc, tags)
// test docker_net measurement
netfields := map[string]interface{}{
@ -45,13 +45,58 @@ func TestDockerGatherContainerStats(t *testing.T) {
acc.AssertContainsTaggedFields(t, "docker_blkio", blkiofields, blkiotags)
// test docker_mem measurement
memfields := sample_mem_fields()
memfields := map[string]interface{}{
"max_usage": uint64(1001),
"usage": uint64(1111),
"fail_count": uint64(1),
"limit": uint64(2000),
"total_pgmafault": uint64(0),
"cache": uint64(0),
"mapped_file": uint64(0),
"total_inactive_file": uint64(0),
"pgpgout": uint64(0),
"rss": uint64(0),
"total_mapped_file": uint64(0),
"writeback": uint64(0),
"unevictable": uint64(0),
"pgpgin": uint64(0),
"total_unevictable": uint64(0),
"pgmajfault": uint64(0),
"total_rss": uint64(44),
"total_rss_huge": uint64(444),
"total_writeback": uint64(55),
"total_inactive_anon": uint64(0),
"rss_huge": uint64(0),
"hierarchical_memory_limit": uint64(0),
"total_pgfault": uint64(0),
"total_active_file": uint64(0),
"active_anon": uint64(0),
"total_active_anon": uint64(0),
"total_pgpgout": uint64(0),
"total_cache": uint64(0),
"inactive_anon": uint64(0),
"active_file": uint64(1),
"pgfault": uint64(2),
"inactive_file": uint64(3),
"total_pgpgin": uint64(4),
"usage_percent": float64(55.55),
}
acc.AssertContainsTaggedFields(t, "docker_mem", memfields, tags)
// test docker_cpu measurement
cputags := copyTags(tags)
cputags["cpu"] = "cpu-total"
cpufields := sample_cpu_fields()
cpufields := map[string]interface{}{
"usage_total": uint64(500),
"usage_in_usermode": uint64(100),
"usage_in_kernelmode": uint64(200),
"usage_system": uint64(100),
"throttling_periods": uint64(1),
"throttling_throttled_periods": uint64(0),
"throttling_throttled_time": uint64(0),
"usage_percent": float64(400.0),
}
acc.AssertContainsTaggedFields(t, "docker_cpu", cpufields, cputags)
cputags["cpu"] = "cpu0"
@ -67,30 +112,6 @@ func TestDockerGatherContainerStats(t *testing.T) {
acc.AssertContainsTaggedFields(t, "docker_cpu", cpu1fields, cputags)
}
func TestDockerGatherContainerPercentages(t *testing.T) {
var acc testutil.Accumulator
stats := testStats()
tags := map[string]string{
"cont_id": "foobarbaz",
"cont_name": "redis",
"cont_image": "redis/image",
}
gatherContainerStats(stats, &acc, tags, true)
// test docker_mem measurement
memfields := sample_mem_fields()
memfields["usage_percent"] = 55.55
acc.AssertContainsTaggedFields(t, "docker_mem", memfields, tags)
// test docker_cpu measurement
cputags := copyTags(tags)
cputags["cpu"] = "cpu-total"
cpufields := sample_cpu_fields()
cpufields["usage_percent"] = 400.0
acc.AssertContainsTaggedFields(t, "docker_cpu", cpufields, cputags)
}
func testStats() *docker.Stats {
stats := &docker.Stats{
Read: time.Now(),
@ -173,58 +194,3 @@ func testStats() *docker.Stats {
return stats
}
func sample_mem_fields() map[string]interface{} {
memfields := map[string]interface{}{
"max_usage": uint64(1001),
"usage": uint64(1111),
"fail_count": uint64(1),
"limit": uint64(2000),
"total_pgmafault": uint64(0),
"cache": uint64(0),
"mapped_file": uint64(0),
"total_inactive_file": uint64(0),
"pgpgout": uint64(0),
"rss": uint64(0),
"total_mapped_file": uint64(0),
"writeback": uint64(0),
"unevictable": uint64(0),
"pgpgin": uint64(0),
"total_unevictable": uint64(0),
"pgmajfault": uint64(0),
"total_rss": uint64(44),
"total_rss_huge": uint64(444),
"total_writeback": uint64(55),
"total_inactive_anon": uint64(0),
"rss_huge": uint64(0),
"hierarchical_memory_limit": uint64(0),
"total_pgfault": uint64(0),
"total_active_file": uint64(0),
"active_anon": uint64(0),
"total_active_anon": uint64(0),
"total_pgpgout": uint64(0),
"total_cache": uint64(0),
"inactive_anon": uint64(0),
"active_file": uint64(1),
"pgfault": uint64(2),
"inactive_file": uint64(3),
"total_pgpgin": uint64(4),
}
return memfields
}
func sample_cpu_fields() map[string]interface{} {
cpufields := map[string]interface{}{
"usage_total": uint64(500),
"usage_in_usermode": uint64(100),
"usage_in_kernelmode": uint64(200),
"usage_system": uint64(100),
"throttling_periods": uint64(1),
"throttling_throttled_periods": uint64(0),
"throttling_throttled_time": uint64(0),
}
return cpufields
}