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WiP: policy: implement policy system metrics.
Implement collection of policy 'system' prometheus metrics. We collect per each memory node - memory capcity - memory usage - number of containers sharing the node We collect per each CPU core - allocation from that core - number of containers sharing the core Signed-off-by: Krisztian Litkey <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,244 @@ | ||
| // Copyright The NRI Plugins Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package policy | ||
|
|
||
| import ( | ||
| "strconv" | ||
|
|
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| "github.com/containers/nri-plugins/pkg/metrics" | ||
| "github.com/containers/nri-plugins/pkg/resmgr/cache" | ||
| system "github.com/containers/nri-plugins/pkg/sysfs" | ||
| "github.com/containers/nri-plugins/pkg/utils/cpuset" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| v1 "k8s.io/api/core/v1" | ||
| ) | ||
|
|
||
| const ( | ||
| nodeCapacity = iota | ||
| nodeUsage | ||
| nodeContainers | ||
| cpuAllocation | ||
| cpuContainers | ||
| metricsCount | ||
| ) | ||
|
|
||
| type ( | ||
| SystemMetrics struct { | ||
| cache cache.Cache | ||
| system system.System | ||
| Nodes map[int]*NodeMetric | ||
| Cpus map[int]*CpuMetric | ||
| Metrics []*prometheus.GaugeVec | ||
| } | ||
| NodeMetric struct { | ||
| Id int | ||
| IdLabel string | ||
| Type string | ||
| Capacity int64 | ||
| Usage int64 | ||
| ContainerCount int | ||
| } | ||
| CpuMetric struct { | ||
| Id int | ||
| IdLabel string | ||
| Allocation int | ||
| ContainerCount int | ||
| } | ||
| ) | ||
|
|
||
| func (p *policy) NewSystemMetrics() *SystemMetrics { | ||
| s := &SystemMetrics{ | ||
| cache: p.cache, | ||
| system: p.system, | ||
| Nodes: map[int]*NodeMetric{}, | ||
| Cpus: map[int]*CpuMetric{}, | ||
| Metrics: make([]*prometheus.GaugeVec, metricsCount, metricsCount), | ||
| } | ||
|
|
||
| s.Metrics[nodeCapacity] = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "mem_node_capacity", | ||
| Help: "Capacity of the memory node.", | ||
| }, | ||
| []string{ | ||
| "node_id", | ||
| }, | ||
| ) | ||
| s.Metrics[nodeUsage] = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "mem_node_usage", | ||
| Help: "Usage of the memory node", | ||
| }, | ||
| []string{ | ||
| "node_id", | ||
| }, | ||
| ) | ||
| s.Metrics[nodeContainers] = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "mem_node_container_count", | ||
| Help: "Number of containers assigned to the memory node.", | ||
| }, | ||
| []string{ | ||
| "node_id", | ||
| }, | ||
| ) | ||
| s.Metrics[cpuAllocation] = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "cpu_allocation", | ||
| Help: "Total allocation of the CPU.", | ||
| }, | ||
| []string{ | ||
| "cpu_id", | ||
| }, | ||
| ) | ||
| s.Metrics[cpuContainers] = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "cpu_container_count", | ||
| Help: "Number of containers assigned to the CPU.", | ||
| }, | ||
| []string{ | ||
| "cpu_id", | ||
| }, | ||
| ) | ||
|
|
||
| for _, id := range s.system.NodeIDs() { | ||
| var ( | ||
| sys = s.system.Node(id) | ||
| capa, used = s.getMemInfo(sys) | ||
| node = &NodeMetric{ | ||
| Id: sys.ID(), | ||
| IdLabel: strconv.Itoa(sys.ID()), | ||
| Type: sys.GetMemoryType().String(), | ||
| Capacity: capa, | ||
| Usage: used, | ||
| } | ||
| ) | ||
| s.Nodes[id] = node | ||
| } | ||
|
|
||
| for _, id := range s.system.CPUIDs() { | ||
| cpu := &CpuMetric{ | ||
| Id: id, | ||
| IdLabel: strconv.Itoa(id), | ||
| } | ||
| s.Cpus[id] = cpu | ||
| } | ||
|
|
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| return s | ||
| } | ||
|
|
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| func (s *SystemMetrics) Describe(ch chan<- *prometheus.Desc) { | ||
| s.Metrics[nodeCapacity].Describe(ch) | ||
| s.Metrics[nodeUsage].Describe(ch) | ||
| s.Metrics[nodeContainers].Describe(ch) | ||
| s.Metrics[cpuAllocation].Describe(ch) | ||
| s.Metrics[cpuContainers].Describe(ch) | ||
| } | ||
|
|
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| func (s *SystemMetrics) Collect(ch chan<- prometheus.Metric) { | ||
| s.Update() | ||
| s.Metrics[nodeCapacity].Collect(ch) | ||
| s.Metrics[nodeUsage].Collect(ch) | ||
| s.Metrics[nodeContainers].Collect(ch) | ||
| s.Metrics[cpuAllocation].Collect(ch) | ||
| s.Metrics[cpuContainers].Collect(ch) | ||
| } | ||
|
|
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| func (s *SystemMetrics) Register() error { | ||
| return metrics.Register("system", s, metrics.WithGroup("policy")) | ||
| } | ||
|
|
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| func (s *SystemMetrics) Update() { | ||
| for _, n := range s.Nodes { | ||
| sys := s.system.Node(n.Id) | ||
| capa, used := s.getMemInfo(sys) | ||
|
|
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| if n.Capacity == 0 { | ||
| n.Capacity = capa | ||
| s.Metrics[nodeCapacity].WithLabelValues(n.IdLabel).Set(float64(n.Capacity)) | ||
| } | ||
|
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| n.Usage = used | ||
| n.ContainerCount = 0 | ||
| } | ||
|
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| for _, c := range s.Cpus { | ||
| c.ContainerCount = 0 | ||
| } | ||
|
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| for _, ctr := range s.cache.GetContainers() { | ||
| switch ctr.GetState() { | ||
| case cache.ContainerStateCreated: | ||
| case cache.ContainerStateRunning: | ||
| default: | ||
| continue | ||
| } | ||
|
|
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| var ( | ||
| cpu, mem = s.getCpuAndMemset(ctr) | ||
| req, _ = s.getCpuResources(ctr) | ||
| ) | ||
|
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| for _, id := range mem.List() { | ||
| if n, ok := s.Nodes[id]; ok { | ||
| n.ContainerCount++ | ||
| } | ||
| } | ||
|
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| for _, id := range cpu.List() { | ||
| if c, ok := s.Cpus[id]; ok { | ||
| c.ContainerCount++ | ||
| if cpu.Size() > 0 { | ||
| c.Allocation += req / cpu.Size() | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| for _, n := range s.Nodes { | ||
| s.Metrics[nodeUsage].WithLabelValues(n.IdLabel).Set(float64(n.Usage)) | ||
| } | ||
| for _, c := range s.Cpus { | ||
| s.Metrics[cpuAllocation].WithLabelValues(c.IdLabel).Set(float64(c.Allocation)) | ||
| s.Metrics[cpuContainers].WithLabelValues(c.IdLabel).Set(float64(c.ContainerCount)) | ||
| } | ||
| } | ||
|
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| func (s *SystemMetrics) getMemInfo(n system.Node) (capacity, used int64) { | ||
| if n != nil { | ||
| if i, _ := n.MemoryInfo(); i != nil { | ||
| return int64(i.MemTotal), int64(i.MemUsed) | ||
| } | ||
| } | ||
| return 0, 0 | ||
| } | ||
|
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| func (s *SystemMetrics) getCpuAndMemset(ctr cache.Container) (cpu, mem cpuset.CPUSet) { | ||
| cset, _ := cpuset.Parse(ctr.GetCpusetCpus()) | ||
| mset, _ := cpuset.Parse(ctr.GetCpusetMems()) | ||
| return cset, mset | ||
| } | ||
|
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| func (s *SystemMetrics) getCpuResources(ctr cache.Container) (request, limit int) { | ||
| res := ctr.GetResourceRequirements() | ||
| if qty, ok := res.Requests[v1.ResourceCPU]; ok { | ||
| request = int(qty.MilliValue()) | ||
| } | ||
| if qty, ok := res.Limits[v1.ResourceCPU]; ok { | ||
| limit = int(qty.MilliValue()) | ||
| } | ||
|
|
||
| return request, limit | ||
| } |