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runtime-rs: add support for gather metrics in runtime-rs
1. Implemented metrics collection for runtime-rs shim and dragonball hypervisor. 2. Described the current supported metrics in runtime-rs.(docs/design/kata-metrics-in-runtime-rs.md) Fixes: #5017 Signed-off-by: Yuan-Zhuo <yuanzhuo0118@outlook.com>
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Yuan-Zhuo
@@ -14,6 +14,7 @@ Kata Containers design documents:
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- [`Inotify` support](inotify.md)
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- [`Hooks` support](hooks-handling.md)
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- [Metrics(Kata 2.0)](kata-2-0-metrics.md)
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- [Metrics in Rust Runtime(runtime-rs)](kata-metrics-in-runtime-rs.md)
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- [Design for Kata Containers `Lazyload` ability with `nydus`](kata-nydus-design.md)
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- [Design for direct-assigned volume](direct-blk-device-assignment.md)
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- [Design for core-scheduling](core-scheduling.md)
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docs/design/kata-metrics-in-runtime-rs.md
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docs/design/kata-metrics-in-runtime-rs.md
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# Kata Metrics in Rust Runtime(runtime-rs)
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Rust Runtime(runtime-rs) is responsible for:
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- Gather metrics about `shim`.
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- Gather metrics from `hypervisor` (through `channel`).
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- Get metrics from `agent` (through `ttrpc`).
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---
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Here are listed all the metrics gathered by `runtime-rs`.
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> * Current status of each entry is marked as:
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> * ✅：DONE
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> * 🚧：TODO
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### Kata Shim
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| STATUS | Metric name | Type | Units | Labels |
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| ------ | ------------------------------------------------------------ | ----------- | -------------- | ------------------------------------------------------------ |
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| 🚧 | `kata_shim_agent_rpc_durations_histogram_milliseconds`: <br> RPC latency distributions. | `HISTOGRAM` | `milliseconds` | <ul><li>`action` (RPC actions of Kata agent)<ul><li>`grpc.CheckRequest`</li><li>`grpc.CloseStdinRequest`</li><li>`grpc.CopyFileRequest`</li><li>`grpc.CreateContainerRequest`</li><li>`grpc.CreateSandboxRequest`</li><li>`grpc.DestroySandboxRequest`</li><li>`grpc.ExecProcessRequest`</li><li>`grpc.GetMetricsRequest`</li><li>`grpc.GuestDetailsRequest`</li><li>`grpc.ListInterfacesRequest`</li><li>`grpc.ListProcessesRequest`</li><li>`grpc.ListRoutesRequest`</li><li>`grpc.MemHotplugByProbeRequest`</li><li>`grpc.OnlineCPUMemRequest`</li><li>`grpc.PauseContainerRequest`</li><li>`grpc.RemoveContainerRequest`</li><li>`grpc.ReseedRandomDevRequest`</li><li>`grpc.ResumeContainerRequest`</li><li>`grpc.SetGuestDateTimeRequest`</li><li>`grpc.SignalProcessRequest`</li><li>`grpc.StartContainerRequest`</li><li>`grpc.StatsContainerRequest`</li><li>`grpc.TtyWinResizeRequest`</li><li>`grpc.UpdateContainerRequest`</li><li>`grpc.UpdateInterfaceRequest`</li><li>`grpc.UpdateRoutesRequest`</li><li>`grpc.WaitProcessRequest`</li><li>`grpc.WriteStreamRequest`</li></ul></li><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_fds`: <br> Kata containerd shim v2 open FDs. | `GAUGE` | | <ul><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_io_stat`: <br> Kata containerd shim v2 process IO statistics. | `GAUGE` | | <ul><li>`item` (see `/proc/<pid>/io`)<ul><li>`cancelledwritebytes`</li><li>`rchar`</li><li>`readbytes`</li><li>`syscr`</li><li>`syscw`</li><li>`wchar`</li><li>`writebytes`</li></ul></li><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_netdev`: <br> Kata containerd shim v2 network devices statistics. | `GAUGE` | | <ul><li>`interface` (network device name)</li><li>`item` (see `/proc/net/dev`)<ul><li>`recv_bytes`</li><li>`recv_compressed`</li><li>`recv_drop`</li><li>`recv_errs`</li><li>`recv_fifo`</li><li>`recv_frame`</li><li>`recv_multicast`</li><li>`recv_packets`</li><li>`sent_bytes`</li><li>`sent_carrier`</li><li>`sent_colls`</li><li>`sent_compressed`</li><li>`sent_drop`</li><li>`sent_errs`</li><li>`sent_fifo`</li><li>`sent_packets`</li></ul></li><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_pod_overhead_cpu`: <br> Kata Pod overhead for CPU resources(percent). | `GAUGE` | percent | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_pod_overhead_memory_in_bytes`: <br> Kata Pod overhead for memory resources(bytes). | `GAUGE` | `bytes` | <ul><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_proc_stat`: <br> Kata containerd shim v2 process statistics. | `GAUGE` | | <ul><li>`item` (see `/proc/<pid>/stat`)<ul><li>`cstime`</li><li>`cutime`</li><li>`stime`</li><li>`utime`</li></ul></li><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_proc_status`: <br> Kata containerd shim v2 process status. | `GAUGE` | | <ul><li>`item` (see `/proc/<pid>/status`)<ul><li>`hugetlbpages`</li><li>`nonvoluntary_ctxt_switches`</li><li>`rssanon`</li><li>`rssfile`</li><li>`rssshmem`</li><li>`vmdata`</li><li>`vmexe`</li><li>`vmhwm`</li><li>`vmlck`</li><li>`vmlib`</li><li>`vmpeak`</li><li>`vmpin`</li><li>`vmpmd`</li><li>`vmpte`</li><li>`vmrss`</li><li>`vmsize`</li><li>`vmstk`</li><li>`vmswap`</li><li>`voluntary_ctxt_switches`</li></ul></li><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_cpu_seconds_total`: <br> Total user and system CPU time spent in seconds. | `COUNTER` | `seconds` | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_max_fds`: <br> Maximum number of open file descriptors. | `GAUGE` | | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_open_fds`: <br> Number of open file descriptors. | `GAUGE` | | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_resident_memory_bytes`: <br> Resident memory size in bytes. | `GAUGE` | `bytes` | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_start_time_seconds`: <br> Start time of the process since `unix` epoch in seconds. | `GAUGE` | `seconds` | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_virtual_memory_bytes`: <br> Virtual memory size in bytes. | `GAUGE` | `bytes` | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_process_virtual_memory_max_bytes`: <br> Maximum amount of virtual memory available in bytes. | `GAUGE` | `bytes` | <ul><li>`sandbox_id`</li></ul> |
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| 🚧 | `kata_shim_rpc_durations_histogram_milliseconds`: <br> RPC latency distributions. | `HISTOGRAM` | `milliseconds` | <ul><li>`action` (Kata shim v2 actions)<ul><li>`checkpoint`</li><li>`close_io`</li><li>`connect`</li><li>`create`</li><li>`delete`</li><li>`exec`</li><li>`kill`</li><li>`pause`</li><li>`pids`</li><li>`resize_pty`</li><li>`resume`</li><li>`shutdown`</li><li>`start`</li><li>`state`</li><li>`stats`</li><li>`update`</li><li>`wait`</li></ul></li><li>`sandbox_id`</li></ul> |
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| ✅ | `kata_shim_threads`: <br> Kata containerd shim v2 process threads. | `GAUGE` | | <ul><li>`sandbox_id`</li></ul> |
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### Kata Hypervisor
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Different from golang runtime, hypervisor and shim in runtime-rs belong to the **same process**, so all previous metrics for hypervisor and shim only need to be gathered once. Thus, we currently only collect previous metrics in kata shim.
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At the same time, we added the interface(`VmmAction::GetHypervisorMetrics`) to gather hypervisor metrics, in case we design tailor-made metrics for hypervisor in the future. Here're metrics exposed from [src/dragonball/src/metric.rs](https://github.com/kata-containers/kata-containers/blob/main/src/dragonball/src/metric.rs).
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| Metric name | Type | Units | Labels |
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| ------------------------------------------------------------ | ---------- | ----- | ------------------------------------------------------------ |
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| `kata_hypervisor_scrape_count`: <br> Metrics scrape count | `COUNTER` | | <ul><li>`sandbox_id`</li></ul> |
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| `kata_hypervisor_vcpu`: <br>Hypervisor metrics specific to VCPUs' mode of functioning. | `IntGauge` | | <ul><li>`item`<ul><li>`exit_io_in`</li><li>`exit_io_out`</li><li>`exit_mmio_read`</li><li>`exit_mmio_write`</li><li>`failures`</li><li>`filter_cpuid`</li></ul></li><li>`sandbox_id`</li></ul> |
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| `kata_hypervisor_seccomp`: <br> Hypervisor metrics for the seccomp filtering. | `IntGauge` | | <ul><li>`item`<ul><li>`num_faults`</li></ul></li><li>`sandbox_id`</li></ul> |
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| `kata_hypervisor_seccomp`: <br> Hypervisor metrics for the seccomp filtering. | `IntGauge` | | <ul><li>`item`<ul><li>`sigbus`</li><li>`sigsegv`</li></ul></li><li>`sandbox_id`</li></ul> |
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