参考

pprof的常用方式

使用交互式命令

  • 查看堆栈调用信息
go tool pprof http://localhost:8001/debug/pprof/heap
  • 查看 30 秒内的 CPU 信息
go tool pprof http://localhost:8001/debug/pprof/profile?seconds=30
  • 查看 goroutine 阻塞
go tool pprof http://localhost:8001/debug/pprof/block
  • 收集 5 秒内的执行路径
go tool pprof http://localhost:8001/debug/pprof/trace?seconds=5
  • 互斥持有者的堆栈跟踪
go tool pprof http://localhost:8001/debug/pprof/mutex

通过UI界面

UI分析工具使用起来相对比较麻烦，我们需要先导出文件，然后再使用go tool工具起服务进行分析。

比如我们导出kube-scheduler的堆栈信息。

curl -sK -v http://localhost:10251/debug/pprof/heap > heap.out

然后使用go tool工具起一个服务，如下：

go tool pprof -http=0.0.0.0:8989 heap.out

然后就可以在浏览器上看到具体的堆栈信息图了。

img

注意，这里需要在服务端安装graphviz组件，各种操作系统的安装方式见https://www.graphviz.org/download/#linux

交互时的一些命令

(pprof) help
  Commands:
    callgrind        Outputs a graph in callgrind format
    comments         Output all profile comments
    disasm           Output assembly listings annotated with samples
    dot              Outputs a graph in DOT format
    eog              Visualize graph through eog
    evince           Visualize graph through evince
    gif              Outputs a graph image in GIF format
    gv               Visualize graph through gv
    kcachegrind      Visualize report in KCachegrind
    list             Output annotated source for functions matching regexp
    pdf              Outputs a graph in PDF format
    peek             Output callers/callees of functions matching regexp
    png              Outputs a graph image in PNG format
    proto            Outputs the profile in compressed protobuf format
    ps               Outputs a graph in PS format
    raw              Outputs a text representation of the raw profile
    svg              Outputs a graph in SVG format
    tags             Outputs all tags in the profile
    text             Outputs top entries in text form
    top              Outputs top entries in text form
    topproto         Outputs top entries in compressed protobuf format
    traces           Outputs all profile samples in text form
    tree             Outputs a text rendering of call graph
    web              Visualize graph through web browser
    weblist          Display annotated source in a web browser
    o/options        List options and their current values
    quit/exit/^D     Exit pprof

  Options:
    call_tree        Create a context-sensitive call tree
    compact_labels   Show minimal headers
    divide_by        Ratio to divide all samples before visualization
    drop_negative    Ignore negative differences
    edgefraction     Hide edges below <f>*total
    focus            Restricts to samples going through a node matching regexp
    hide             Skips nodes matching regexp
    ignore           Skips paths going through any nodes matching regexp
    mean             Average sample value over first value (count)
    nodecount        Max number of nodes to show
    nodefraction     Hide nodes below <f>*total
    noinlines        Ignore inlines.
    normalize        Scales profile based on the base profile.
    output           Output filename for file-based outputs
    prune_from       Drops any functions below the matched frame.
    relative_percentages Show percentages relative to focused subgraph
    sample_index     Sample value to report (0-based index or name)
    show             Only show nodes matching regexp
    show_from        Drops functions above the highest matched frame.
    source_path      Search path for source files
    tagfocus         Restricts to samples with tags in range or matched by regexp
    taghide          Skip tags matching this regexp
    tagignore        Discard samples with tags in range or matched by regexp
    tagshow          Only consider tags matching this regexp
    trim             Honor nodefraction/edgefraction/nodecount defaults
    trim_path        Path to trim from source paths before search
    unit             Measurement units to display

  Option groups (only set one per group):
    cumulative       
      cum              Sort entries based on cumulative weight
      flat             Sort entries based on own weight
    granularity      
      addresses        Aggregate at the address level.
      filefunctions    Aggregate at the function level.
      files            Aggregate at the file level.
      functions        Aggregate at the function level.
      lines            Aggregate at the source code line level.
  :   Clear focus/ignore/hide/tagfocus/tagignore

  type "help <cmd|option>" for more information

top 命令

输入命令 top 10 查看对应资源开销 （例如 cpu就是执行耗时/开销 Memory 就是内存占用大小）排名前十的函数
(pprof) top 10
Showing nodes accounting for 10.82s, 79.97% of 13.53s total
Dropped 64 nodes (cum <= 0.07s)
Showing top 10 nodes out of 61
      flat  flat%   sum%        cum   cum%
     7.50s 55.43% 55.43%      7.56s 55.88%  runtime.stdcall1
     1.88s 13.90% 69.33%      1.90s 14.04%  runtime.cgocall
     0.31s  2.29% 71.62%      2.25s 16.63%  runtime.timerproc
     0.26s  1.92% 73.54%      0.26s  1.92%  runtime.(*mcache).prepareForSweep
     0.20s  1.48% 75.02%      0.53s  3.92%  runtime.acquirep
     0.18s  1.33% 76.35%      0.18s  1.33%  runtime.casgstatus
     0.15s  1.11% 77.46%      1.18s  8.72%  runtime.exitsyscall
     0.12s  0.89% 78.34%      0.52s  3.84%  runtime.goroutineReady
     0.11s  0.81% 79.16%      8.79s 64.97%  runtime.systemstack
     0.11s  0.81% 79.97%      0.11s  0.81%  runtime.unlock
　　

flat：当前函数上运行耗时
flat%：函数自身占用的 CPU 运行耗时总比例
sum%：函数自身累积使用 CPU 总比例
cum：当前函数及其调用函数的运行总耗时
cum%：函数自身及其调用函数占 CPU 运行耗时总比例
最后一列为函数名称
大多数情况下，我们可以得出一个应用程序的运行情况，知道当前是什么函数，正在做什么事情，占用了多少资源等。

实际使用

k8s 各组件暴露的端口

kube-proxy
  • 10249：用于节点上的kubeproxy的健康检查和状态查询。
  • 10256：用于NodePort服务的负载均衡。
  • portpool（30000-32767）：NodePort服务的端口范围，这些端口用于外部流量访问Kubernetes集群中的服务。
kubelet
  • 10250：kubelet API服务器的端口，用于集群中的其他组件（如kube-scheduler、kube-controller-manager、kubectl）与kubelet进行通信。此端口通常由Kubernetes的授权策略进行保护，只允许授权用户或组访问。
  • 10255：kubelet的只读端口，用于提供节点的健康状况以及容器运行时信息的监控数据。
  • 10248：kubelet的非安全端口，用于提供节点的健康状况以及容器运行时信息的监控数据。此端口不受Kubernetes的授权策略保护。
  • 36888：kubelet启动时随机分配的端口，用于处理容器日志收集器fluentd的日志转发请求。
kube-schedule
  • 10251：kube-scheduler和kube-apiserver组件之间的通信端口，用于接收来自kube-apiserver的调度请求，并将调度结果返回给kube-apiserver。
  • 10259：kube-scheduler和kubectl之间的通信端口，用于获取当前的集群调度状态，并进行一些操作，如手动重新调度Pod等。
kube-controller
  • 10252：kube-controller-manager和kube-apiserver之间的通信端口，用于接收kube-apiserver发送的请求，包括同步cluster state、管理Pod副本数、节点状态等。
  • 10257：用于提供/metrics和/healthz等信息，包括kube-controller-manager的运行状态、性能指标等。
kube-apiserver
  • 6443：通过该端口可以访问Kubernetes API服务器的RESTful API，从而实现对Kubernetes集群的管理和控制。通过kube-apiserver，可以进行集群的配置、资源调度、容器编排、应用部署等操作。
etcd
  • 2379：etcd客户端和etcd节点进行数据读写的端口
  • 2380：etcd集群内部节点之间进行同步的端口
  • 2381：用于监控etcd性能指标的URL列表。

kube-controller-manager 排错

  • top 显示信息比较简略
  • tree 显示信息比较详细
# 为了排查 kube-controller-manager cpu 占用异常问题（达到 100% 多）
# 1. 首先更改 kube-controller-manager 配置 yaml，打开 profiling 就是设置 profili=True
# 2. 利用 pprof 采集 10252 端口信息
[root]# go tool pprof http://localhost:10252/debug/pprof/profile?seconds=60
Fetching profile over HTTP from http://localhost:10252/debug/pprof/profile?seconds=60
Saved profile in /root/pprof/pprof.kube-controller-manager.samples.cpu.002.pb.gz
File: kube-controller-manager
Type: cpu
Time: Jul 27, 2027 at 5:19am (CST)
Duration: 1mins, Total samples = 1.07mins (106.85%)
Entering interactive mode (type "help" for commands, "o" for options)
# top 显示信息比较简略
(pprof) top
Showing nodes accounting for 27.60s, 42.92% of 64.31s total
Dropped 319 nodes (cum <= 0.32s)
Showing top 10 nodes out of 101
      flat  flat%   sum%        cum   cum%
     5.18s  8.05%  8.05%      5.62s  8.74%  runtime.nanotime
     4.03s  6.27% 14.32%      4.42s  6.87%  runtime.walltime
     3.99s  6.20% 20.53%      3.99s  6.20%  aeshashbody
     2.41s  3.75% 24.27%      9.15s 14.23%  runtime.nilinterhash
     2.34s  3.64% 27.91%      5.09s  7.91%  runtime.mallocgc
     2.17s  3.37% 31.29%      6.64s 10.32%  runtime.typehash
     2.11s  3.28% 34.57%      2.11s  3.28%  k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).observe
     1.96s  3.05% 37.61%      7.61s 11.83%  runtime.mapdelete
     1.71s  2.66% 40.27%      5.78s  8.99%  runtime.mapassign
     1.70s  2.64% 42.92%      6.42s  9.98%  runtime.mapaccess2
(pprof) top 
Showing nodes accounting for 27.60s, 42.92% of 64.31s total
Dropped 319 nodes (cum <= 0.32s)
Showing top 10 nodes out of 101
      flat  flat%   sum%        cum   cum%
     5.18s  8.05%  8.05%      5.62s  8.74%  runtime.nanotime
     4.03s  6.27% 14.32%      4.42s  6.87%  runtime.walltime
     3.99s  6.20% 20.53%      3.99s  6.20%  aeshashbody
     2.41s  3.75% 24.27%      9.15s 14.23%  runtime.nilinterhash
     2.34s  3.64% 27.91%      5.09s  7.91%  runtime.mallocgc
     2.17s  3.37% 31.29%      6.64s 10.32%  runtime.typehash
     2.11s  3.28% 34.57%      2.11s  3.28%  k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).observe
     1.96s  3.05% 37.61%      7.61s 11.83%  runtime.mapdelete
     1.71s  2.66% 40.27%      5.78s  8.99%  runtime.mapassign
     1.70s  2.64% 42.92%      6.42s  9.98%  runtime.mapaccess2
(pprof) call_tree
# tree 显示信息比较详细
(pprof) tree
Showing nodes accounting for 58.49s, 90.95% of 64.31s total
Dropped 319 nodes (cum <= 0.32s)
Showing top 80 nodes out of 101
----------------------------------------------------------+-------------
      flat  flat%   sum%        cum   cum%   calls calls% + context              
----------------------------------------------------------+-------------
                                             3.73s 66.37% |   time.now
                                             1.85s 32.92% |   time.Since
     5.18s  8.05%  8.05%      5.62s  8.74%                | runtime.nanotime
                                             0.44s  7.83% |   runtime.nanotime1
----------------------------------------------------------+-------------
                                             4.42s   100% |   time.now (inline)
     4.03s  6.27% 14.32%      4.42s  6.87%                | runtime.walltime
                                             0.39s  8.82% |   runtime.walltime1
----------------------------------------------------------+-------------
                                             3.99s   100% |   runtime.typehash
     3.99s  6.20% 20.53%      3.99s  6.20%                | aeshashbody
----------------------------------------------------------+-------------
                                             3.27s 35.74% |   runtime.mapaccess2
                                             3.09s 33.77% |   runtime.mapassign
                                             2.79s 30.49% |   runtime.mapdelete
     2.41s  3.75% 24.27%      9.15s 14.23%                | runtime.nilinterhash
                                             6.64s 72.57% |   runtime.typehash
----------------------------------------------------------+-------------
                                             2.47s 48.53% |   runtime.convTstring
                                             1.43s 28.09% |   runtime.growslice
                                             1.16s 22.79% |   runtime.rawstring
     2.34s  3.64% 27.91%      5.09s  7.91%                | runtime.mallocgc
                                             0.69s 13.56% |   runtime.(*mcentral).cacheSpan
                                             0.65s 12.77% |   runtime.heapBitsSetType
                                             0.61s 11.98% |   runtime.nextFreeFast (inline)
                                             0.09s  1.77% |   runtime.scanobject
                                             0.07s  1.38% |   runtime.gentraceback
----------------------------------------------------------+-------------
                                             6.64s   100% |   runtime.nilinterhash
     2.17s  3.37% 31.29%      6.64s 10.32%                | runtime.typehash
                                             3.99s 60.09% |   aeshashbody
                                             0.48s  7.23% |   runtime.strhash
----------------------------------------------------------+-------------
                                             2.11s   100% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).Observe
     2.11s  3.28% 34.57%      2.11s  3.28%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).observe
----------------------------------------------------------+-------------
                                             3.96s 52.04% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.delete
                                             1.48s 19.45% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             1.41s 18.53% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
                                             0.76s  9.99% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*ItemExponentialFailureRateLimiter).Forget
     1.96s  3.05% 37.61%      7.61s 11.83%                | runtime.mapdelete
                                             2.79s 36.66% |   runtime.nilinterhash
                                             1.38s 18.13% |   runtime.nilinterequal
                                             1.22s 16.03% |   runtime.memclrHasPointers
----------------------------------------------------------+-------------
                                             3.01s 52.08% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.insert
                                             1.41s 24.39% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
                                             1.36s 23.53% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
     1.71s  2.66% 40.27%      5.78s  8.99%                | runtime.mapassign
                                             3.09s 53.46% |   runtime.nilinterhash
                                             0.54s  9.34% |   runtime.typedmemmove
----------------------------------------------------------+-------------
                                             3.44s 53.58% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.has
                                             1.40s 21.81% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
                                             1.15s 17.91% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             0.43s  6.70% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
     1.70s  2.64% 42.92%      6.42s  9.98%                | runtime.mapaccess2
                                             3.27s 50.93% |   runtime.nilinterhash
                                             1.35s 21.03% |   runtime.nilinterequal
----------------------------------------------------------+-------------
                                             0.48s 28.57% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).ShuttingDown
                                             0.36s 21.43% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add
                                             0.34s 20.24% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get
                                             0.27s 16.07% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
                                             0.23s 13.69% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*ItemExponentialFailureRateLimiter).Forget
     1.68s  2.61% 45.53%      1.68s  2.61%                | sync.(*Mutex).Unlock
----------------------------------------------------------+-------------
                                             2.59s 96.64% |   runtime.gcDrain
                                             0.09s  3.36% |   runtime.mallocgc
     1.65s  2.57% 48.10%      2.68s  4.17%                | runtime.scanobject
                                             0.41s 15.30% |   runtime.greyobject
                                             0.39s 14.55% |   runtime.findObject
----------------------------------------------------------+-------------
                                             0.45s 28.66% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
                                             0.41s 26.11% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get
                                             0.37s 23.57% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).ShuttingDown
                                             0.33s 21.02% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add
     1.57s  2.44% 50.54%      1.57s  2.44%                | sync.(*Mutex).Lock
----------------------------------------------------------+-------------
                                             1.19s   100% |   runtime.efaceeq
     0.90s  1.40% 51.94%      1.19s  1.85%                | runtime.strequal
                                             0.29s 24.37% |   runtime.memequal
----------------------------------------------------------+-------------
                                             2.53s   100% |   runtime.concatstring3
     0.86s  1.34% 53.27%      2.53s  3.93%                | runtime.concatstrings
                                             1.30s 51.38% |   runtime.rawstringtmp
                                             0.37s 14.62% |   runtime.memmove
----------------------------------------------------------+-------------
                                             1.38s 50.55% |   runtime.mapdelete
                                             1.35s 49.45% |   runtime.mapaccess2
     0.86s  1.34% 54.61%      2.73s  4.25%                | runtime.nilinterequal
                                             1.87s 68.50% |   runtime.efaceeq
----------------------------------------------------------+-------------
                                            26.82s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
     0.83s  1.29% 55.90%     26.82s 41.70%                | k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                            11.42s 42.58% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*delayingType).AddAfter
                                             4.94s 18.42% |   k8s.io/kubernetes/vendor/k8s.io/client-go/listers/coordination/v1.leaseNamespaceLister.Get
                                             4.83s 18.01% |   time.Now
                                             1.64s  6.11% |   k8s.io/kubernetes/vendor/k8s.io/client-go/listers/mizarcore/v1alpha1.(*clusterLister).Get
                                             1.49s  5.56% |   runtime.convTstring
                                             0.89s  3.32% |   time.Time.Sub
                                             0.51s  1.90% |   time.Time.Add
----------------------------------------------------------+-------------
                                             0.40s 50.63% |   runtime.memclrHasPointers
                                             0.31s 39.24% |   runtime.(*mcentral).cacheSpan
     0.79s  1.23% 57.13%      0.79s  1.23%                | runtime.memclrNoHeapPointers
----------------------------------------------------------+-------------
                                             1.42s   100% |   sort.SearchFloat64s
     0.79s  1.23% 58.36%      1.42s  2.21%                | sort.Search
                                             0.63s 44.37% |   sort.SearchFloat64s.func1
----------------------------------------------------------+-------------
                                             0.75s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*threadSafeMap).Get
     0.75s  1.17% 59.52%      0.75s  1.17%                | sync.(*RWMutex).RUnlock
----------------------------------------------------------+-------------
                                             3.04s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*cache).GetByKey
     0.71s  1.10% 60.63%      3.04s  4.73%                | k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*threadSafeMap).Get
                                             0.98s 32.24% |   runtime.mapaccess2_faststr
                                             0.75s 24.67% |   sync.(*RWMutex).RUnlock
                                             0.60s 19.74% |   sync.(*RWMutex).RLock (inline)
----------------------------------------------------------+-------------
                                            13.91s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
     0.71s  1.10% 61.73%     13.91s 21.63%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
                                             7.02s 50.47% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             2.06s 14.81% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.delete
                                             1.74s 12.51% |   runtime.growslice
                                             1.53s 11.00% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.has (inline)
                                             0.45s  3.24% |   sync.(*Mutex).Lock
                                             0.27s  1.94% |   sync.(*Mutex).Unlock
----------------------------------------------------------+-------------
                                             0.51s 50.00% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                             0.51s 50.00% |   time.Time.Sub
     0.71s  1.10% 62.84%      1.02s  1.59%                | time.Time.Add
----------------------------------------------------------+-------------
                                             0.37s 55.22% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Inc
                                             0.30s 44.78% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Dec
     0.66s  1.03% 63.86%      0.67s  1.04%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Add
----------------------------------------------------------+-------------
                                             0.98s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*threadSafeMap).Get
     0.66s  1.03% 64.89%      0.98s  1.52%                | runtime.mapaccess2_faststr
----------------------------------------------------------+-------------
                                             0.33s 51.56% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
                                             0.31s 48.44% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultRetryMetrics).retry
     0.64s     1% 65.88%      0.64s     1%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*counter).Inc
----------------------------------------------------------+-------------
# 此处 调用函数 doUpdateClusterPhasePass 为 0.64 s，但后续的调用 cnum 统计时间为 26.82 秒，占用 cpu 时间较长，说明此处可能有问题，死循环之类
# 后续查看代码发现确实此处有问题，判断逻辑有问题，导致一直有 update event 进入队列等待处理，从而占用 cpu
     0.64s     1% 66.88%     59.53s 92.57%                | k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
                                            26.82s 45.05% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                            15.15s 25.45% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get
                                            13.91s 23.37% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
                                             1.73s  2.91% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).handleLeaseErr
                                             1.28s  2.15% |   runtime.convTstring
----------------------------------------------------------+-------------
                                             0.63s   100% |   sort.Search
     0.63s  0.98% 67.86%      0.63s  0.98%                | sort.SearchFloat64s.func1
----------------------------------------------------------+-------------
                                             0.61s   100% |   runtime.mallocgc (inline)
     0.61s  0.95% 68.81%      0.61s  0.95%                | runtime.nextFreeFast
----------------------------------------------------------+-------------
                                             0.60s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*threadSafeMap).Get (inline)
     0.60s  0.93% 69.74%      0.60s  0.93%                | sync.(*RWMutex).RLock
----------------------------------------------------------+-------------
                                             0.59s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).sinceInSeconds (inline)
     0.59s  0.92% 70.66%      0.59s  0.92%                | time.Duration.Seconds
----------------------------------------------------------+-------------
                                             4.83s 52.39% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                             4.39s 47.61% |   k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/clock.RealClock.Now
     0.55s  0.86% 71.51%      9.22s 14.34%                | time.Now
                                             8.67s 94.03% |   time.now
----------------------------------------------------------+-------------
                                             1.87s   100% |   runtime.nilinterequal
     0.53s  0.82% 72.34%      1.87s  2.91%                | runtime.efaceeq
                                             1.19s 63.64% |   runtime.strequal
----------------------------------------------------------+-------------
                                             8.67s   100% |   time.Now
     0.52s  0.81% 73.15%      8.67s 13.48%                | time.now
                                             4.42s 50.98% |   runtime.walltime (inline)
                                             3.73s 43.02% |   runtime.nanotime
----------------------------------------------------------+-------------
                                             0.37s 75.51% |   runtime.concatstrings
                                             0.10s 20.41% |   runtime.typedmemmove
     0.49s  0.76% 73.91%      0.49s  0.76%                | runtime.memmove
----------------------------------------------------------+-------------
                                             0.48s   100% |   runtime.typehash
     0.48s  0.75% 74.65%      0.48s  0.75%                | runtime.strhash
----------------------------------------------------------+-------------
                                             1.79s 52.65% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             1.61s 47.35% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
     0.47s  0.73% 75.38%      3.40s  5.29%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).sinceInSeconds
                                             2.33s 68.53% |   time.Since
                                             0.59s 17.35% |   time.Duration.Seconds (inline)
----------------------------------------------------------+-------------
                                             0.48s 94.12% |   runtime.memclrHasPointers
     0.46s  0.72% 76.10%      0.51s  0.79%                | runtime.bulkBarrierPreWrite
----------------------------------------------------------+-------------
                                            10.32s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get
     0.45s   0.7% 76.80%     10.32s 16.05%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
                                             2.08s 20.16% |   k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/clock.RealClock.Now
                                             1.63s 15.79% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).Observe
                                             1.61s 15.60% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).sinceInSeconds
                                             1.41s 13.66% |   runtime.mapdelete
                                             1.40s 13.57% |   runtime.mapaccess2
                                             1.36s 13.18% |   runtime.mapassign
                                             0.38s  3.68% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Dec
----------------------------------------------------------+-------------
                                             0.65s   100% |   runtime.mallocgc
     0.45s   0.7% 77.50%      0.65s  1.01%                | runtime.heapBitsSetType
----------------------------------------------------------+-------------
                                             1.44s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*MaxOfRateLimiter).Forget
     0.44s  0.68% 78.18%      1.44s  2.24%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*ItemExponentialFailureRateLimiter).Forget
                                             0.76s 52.78% |   runtime.mapdelete
                                             0.23s 15.97% |   sync.(*Mutex).Unlock
----------------------------------------------------------+-------------
                                             0.44s   100% |   runtime.nanotime
     0.44s  0.68% 78.87%      0.44s  0.68%                | runtime.nanotime1
----------------------------------------------------------+-------------
                                            15.15s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
     0.41s  0.64% 79.51%     15.15s 23.56%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get
                                            10.32s 68.12% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
                                             1.99s 13.14% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.delete (inline)
                                             1.68s 11.09% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.insert (inline)
                                             0.41s  2.71% |   sync.(*Mutex).Lock
                                             0.34s  2.24% |   sync.(*Mutex).Unlock
----------------------------------------------------------+-------------
                                             0.54s   100% |   runtime.mapassign
     0.41s  0.64% 80.14%      0.54s  0.84%                | runtime.typedmemmove
                                             0.10s 18.52% |   runtime.memmove
----------------------------------------------------------+-------------
                                             1.97s 57.27% |   k8s.io/kubernetes/vendor/k8s.io/client-go/listers/coordination/v1.leaseNamespaceLister.Get
                                             1.47s 42.73% |   k8s.io/kubernetes/vendor/k8s.io/client-go/listers/mizarcore/v1alpha1.(*clusterLister).Get
     0.40s  0.62% 80.77%      3.44s  5.35%                | k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*cache).GetByKey
                                             3.04s 88.37% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*threadSafeMap).Get
----------------------------------------------------------+-------------
                                             0.89s 82.41% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                             0.19s 17.59% |   time.Since
     0.40s  0.62% 81.39%      1.08s  1.68%                | time.Time.Sub
                                             0.51s 47.22% |   time.Time.Add
----------------------------------------------------------+-------------
                                             0.39s   100% |   runtime.walltime
     0.39s  0.61% 81.99%      0.39s  0.61%                | runtime.walltime1
----------------------------------------------------------+-------------
                                             0.39s 84.78% |   runtime.scanobject
     0.38s  0.59% 82.58%      0.46s  0.72%                | runtime.findObject
----------------------------------------------------------+-------------
                                             0.29s 78.38% |   runtime.strequal
     0.37s  0.58% 83.16%      0.37s  0.58%                | runtime.memequal
----------------------------------------------------------+-------------
                                             1.22s   100% |   runtime.mapdelete
     0.34s  0.53% 83.69%      1.22s  1.90%                | runtime.memclrHasPointers
                                             0.48s 39.34% |   runtime.bulkBarrierPreWrite
                                             0.40s 32.79% |   runtime.memclrNoHeapPointers
----------------------------------------------------------+-------------
                                             4.94s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
     0.31s  0.48% 84.17%      4.94s  7.68%                | k8s.io/kubernetes/vendor/k8s.io/client-go/listers/coordination/v1.leaseNamespaceLister.Get
                                             2.66s 53.85% |   runtime.concatstring3
                                             1.97s 39.88% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*cache).GetByKey
----------------------------------------------------------+-------------
                                             1.16s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*delayingType).AddAfter
     0.31s  0.48% 84.65%      1.16s  1.80%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).ShuttingDown
                                             0.48s 41.38% |   sync.(*Mutex).Unlock
                                             0.37s 31.90% |   sync.(*Mutex).Lock
----------------------------------------------------------+-------------
                                             5.29s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add
     0.30s  0.47% 85.12%      5.29s  8.23%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
                                             2.37s 44.80% |   k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/clock.RealClock.Now
                                             1.41s 26.65% |   runtime.mapassign
                                             0.44s  8.32% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Inc
                                             0.43s  8.13% |   runtime.mapaccess2
                                             0.33s  6.24% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*counter).Inc
----------------------------------------------------------+-------------
                                             1.49s 53.79% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
                                             1.28s 46.21% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
     0.30s  0.47% 85.59%      2.77s  4.31%                | runtime.convTstring
                                             2.47s 89.17% |   runtime.mallocgc
----------------------------------------------------------+-------------
                                             2.33s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).sinceInSeconds
     0.29s  0.45% 86.04%      2.33s  3.62%                | time.Since
                                             1.85s 79.40% |   runtime.nanotime
                                             0.19s  8.15% |   time.Time.Sub
----------------------------------------------------------+-------------
                                             7.02s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
     0.26s   0.4% 86.44%      7.02s 10.92%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             2.34s 33.33% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).Observe
                                             1.79s 25.50% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).sinceInSeconds
                                             1.48s 21.08% |   runtime.mapdelete
                                             1.15s 16.38% |   runtime.mapaccess2
----------------------------------------------------------+-------------
                                            11.42s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
     0.25s  0.39% 86.83%     11.42s 17.76%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*delayingType).AddAfter
                                             9.66s 84.59% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add
                                             1.16s 10.16% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).ShuttingDown
                                             0.35s  3.06% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultRetryMetrics).retry
----------------------------------------------------------+-------------
                                             9.66s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*delayingType).AddAfter
     0.22s  0.34% 87.17%      9.66s 15.02%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add
                                             5.29s 54.76% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
                                             2.03s 21.01% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.has (inline)
                                             1.43s 14.80% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.insert (inline)
                                             0.36s  3.73% |   sync.(*Mutex).Unlock
                                             0.33s  3.42% |   sync.(*Mutex).Lock
----------------------------------------------------------+-------------
                                             0.80s 91.95% |   runtime.gcDrain
                                             0.07s  8.05% |   runtime.mallocgc
     0.22s  0.34% 87.51%      0.87s  1.35%                | runtime.gentraceback
                                             0.07s  8.05% |   runtime.greyobject
----------------------------------------------------------+-------------
                                             1.74s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
     0.22s  0.34% 87.86%      1.74s  2.71%                | runtime.growslice
                                             1.43s 82.18% |   runtime.mallocgc
----------------------------------------------------------+-------------
                                             2.34s 58.94% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).done
                                             1.63s 41.06% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
     0.17s  0.26% 88.12%      3.97s  6.17%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).Observe
                                             2.11s 53.15% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).observe
                                             1.69s 42.57% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).findBucket
----------------------------------------------------------+-------------
                                             1.64s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).syncClusterPhaseWithLease
     0.17s  0.26% 88.38%      1.64s  2.55%                | k8s.io/kubernetes/vendor/k8s.io/client-go/listers/mizarcore/v1alpha1.(*clusterLister).Get
                                             1.47s 89.63% |   k8s.io/kubernetes/vendor/k8s.io/client-go/tools/cache.(*cache).GetByKey
----------------------------------------------------------+-------------
                                             1.61s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*rateLimitingType).Forget
     0.17s  0.26% 88.65%      1.61s  2.50%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*MaxOfRateLimiter).Forget
                                             1.44s 89.44% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*ItemExponentialFailureRateLimiter).Forget
----------------------------------------------------------+-------------
                                             1.59s   100% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).findBucket
     0.17s  0.26% 88.91%      1.59s  2.47%                | sort.SearchFloat64s
                                             1.42s 89.31% |   sort.Search
----------------------------------------------------------+-------------
                                             2.66s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/listers/coordination/v1.leaseNamespaceLister.Get
     0.13s   0.2% 89.12%      2.66s  4.14%                | runtime.concatstring3
                                             2.53s 95.11% |   runtime.concatstrings
----------------------------------------------------------+-------------
                                             2.03s 57.02% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add (inline)
                                             1.53s 42.98% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done (inline)
     0.12s  0.19% 89.30%      3.56s  5.54%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.has
                                             3.44s 96.63% |   runtime.mapaccess2
----------------------------------------------------------+-------------
     0.12s  0.19% 89.49%      3.70s  5.75%                | runtime.gcDrain
                                             2.59s 70.00% |   runtime.scanobject
                                             0.80s 21.62% |   runtime.gentraceback
----------------------------------------------------------+-------------
                                             1.69s   100% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).Observe
     0.10s  0.16% 89.64%      1.69s  2.63%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*histogram).findBucket
                                             1.59s 94.08% |   sort.SearchFloat64s
----------------------------------------------------------+-------------
                                             1.68s 54.02% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get (inline)
                                             1.43s 45.98% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Add (inline)
     0.10s  0.16% 89.80%      3.11s  4.84%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.insert
                                             3.01s 96.78% |   runtime.mapassign
----------------------------------------------------------+-------------
                                             2.06s 50.86% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Done
                                             1.99s 49.14% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*Type).Get (inline)
     0.09s  0.14% 89.94%      4.05s  6.30%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.set.delete
                                             3.96s 97.78% |   runtime.mapdelete
----------------------------------------------------------+-------------
                                             0.38s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
     0.08s  0.12% 90.06%      0.38s  0.59%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Dec
                                             0.30s 78.95% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Add
----------------------------------------------------------+-------------
                                             1.69s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).handleLeaseErr
     0.08s  0.12% 90.19%      1.69s  2.63%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*rateLimitingType).Forget
                                             1.61s 95.27% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*MaxOfRateLimiter).Forget
----------------------------------------------------------+-------------
                                             0.41s 83.67% |   runtime.scanobject
                                             0.07s 14.29% |   runtime.gentraceback
     0.08s  0.12% 90.31%      0.49s  0.76%                | runtime.greyobject
----------------------------------------------------------+-------------
                                             1.24s   100% |   runtime.rawstringtmp
     0.08s  0.12% 90.44%      1.24s  1.93%                | runtime.rawstring
                                             1.16s 93.55% |   runtime.mallocgc
----------------------------------------------------------+-------------
                                             0.44s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
     0.07s  0.11% 90.55%      0.44s  0.68%                | k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Inc
                                             0.37s 84.09% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*gauge).Add
----------------------------------------------------------+-------------
                                             2.37s 53.26% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).add
                                             2.08s 46.74% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultQueueMetrics).get
     0.06s 0.093% 90.64%      4.45s  6.92%                | k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/clock.RealClock.Now
                                             4.39s 98.65% |   time.Now
----------------------------------------------------------+-------------
                                             0.69s   100% |   runtime.mallocgc
     0.06s 0.093% 90.73%      0.69s  1.07%                | runtime.(*mcentral).cacheSpan
                                             0.31s 44.93% |   runtime.memclrNoHeapPointers
----------------------------------------------------------+-------------
                                             1.30s   100% |   runtime.concatstrings
     0.06s 0.093% 90.83%      1.30s  2.02%                | runtime.rawstringtmp
                                             1.24s 95.38% |   runtime.rawstring
----------------------------------------------------------+-------------
                                             0.35s   100% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*delayingType).AddAfter
     0.04s 0.062% 90.89%      0.35s  0.54%                | k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*defaultRetryMetrics).retry
                                             0.31s 88.57% |   k8s.io/kubernetes/vendor/github.com/prometheus/client_golang/prometheus.(*counter).Inc
----------------------------------------------------------+-------------
                                             1.73s   100% |   k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).doUpdateClusterPhasePass
     0.04s 0.062% 90.95%      1.73s  2.69%                | k8s.io/kubernetes/vendor/k8s.io/kubernetes/pkg/controller/clusterstatusupdate.(*Controller).handleLeaseErr
                                             1.69s 97.69% |   k8s.io/kubernetes/vendor/k8s.io/client-go/util/workqueue.(*rateLimitingType).Forget
----------------------------------------------------------+-------------
# kubernetes # 容器 # 云原生
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k8s 火了！

2020，上云之年，产品云端化成为一种趋势。在一线城市，很多公司都已经构建了自己的私有云环境，比如阿里云、网易云、华为云等。而Kubernetes 作为基于容器编排领域的王者，具备扩展...

avatar K8S/Kubernetes