From be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 04:57:58 +0200 Subject: Adding upstream version 1.44.3. Signed-off-by: Daniel Baumann --- .../ebpf.plugin/integrations/ebpf_processes.md | 187 +++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 collectors/ebpf.plugin/integrations/ebpf_processes.md (limited to 'collectors/ebpf.plugin/integrations/ebpf_processes.md') diff --git a/collectors/ebpf.plugin/integrations/ebpf_processes.md b/collectors/ebpf.plugin/integrations/ebpf_processes.md new file mode 100644 index 00000000..62542359 --- /dev/null +++ b/collectors/ebpf.plugin/integrations/ebpf_processes.md @@ -0,0 +1,187 @@ + + +# eBPF Processes + + + + + +Plugin: ebpf.plugin +Module: processes + + + +## Overview + +Monitor calls for function creating tasks (threads and processes) inside Linux kernel. + +Attach tracing (kprobe or tracepoint, and trampoline) to internal kernel functions. + +This collector is only supported on the following platforms: + +- Linux + +This collector supports collecting metrics from multiple instances of this integration, including remote instances. + +The plugin needs setuid because it loads data inside kernel. Netada sets necessary permission during installation time. + +### Default Behavior + +#### Auto-Detection + +The plugin checks kernel compilation flags (CONFIG_KPROBES, CONFIG_BPF, CONFIG_BPF_SYSCALL, CONFIG_BPF_JIT), files inside debugfs, and presence of BTF files to decide which eBPF program will be attached. + +#### Limits + +The default configuration for this integration does not impose any limits on data collection. + +#### Performance Impact + +This thread will add overhead every time that an internal kernel function monitored by this thread is called. + + +## Metrics + +Metrics grouped by *scope*. + +The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels. + + + +### Per eBPF Processes instance + +These metrics show total number of calls to functions inside kernel. + +This scope has no labels. + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| system.process_thread | process | calls/s | +| system.process_status | process, zombie | difference | +| system.exit | process | calls/s | +| system.task_error | task | calls/s | + +### Per apps + +These Metrics show grouped information per apps group. + +Labels: + +| Label | Description | +|:-----------|:----------------| +| app_group | The name of the group defined in the configuration. | + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| app.process_create | calls | calls/s | +| app.thread_create | call | calls/s | +| app.task_exit | call | calls/s | +| app.task_close | call | calls/s | +| app.task_error | app | calls/s | + +### Per cgroup + +These Metrics show grouped information per cgroup/service. + +This scope has no labels. + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| cgroup.process_create | process | calls/s | +| cgroup.thread_create | thread | calls/s | +| cgroup.task_exit | exit | calls/s | +| cgroup.task_close | process | calls/s | +| cgroup.task_error | process | calls/s | +| services.process_create | a dimension per systemd service | calls/s | +| services.thread_create | a dimension per systemd service | calls/s | +| services.task_close | a dimension per systemd service | calls/s | +| services.task_exit | a dimension per systemd service | calls/s | +| services.task_error | a dimension per systemd service | calls/s | + + + +## Alerts + +There are no alerts configured by default for this integration. + + +## Setup + +### Prerequisites + +#### Compile kernel + +Check if your kernel was compiled with necessary options (CONFIG_KPROBES, CONFIG_BPF, CONFIG_BPF_SYSCALL, CONFIG_BPF_JIT) in `/proc/config.gz` or inside /boot/config file. Some cited names can be different accoring preferences of Linux distributions. +When you do not have options set, it is necessary to get the kernel source code from https://kernel.org or a kernel package from your distribution, this last is preferred. The kernel compilation has a well definedd pattern, but distributions can deliver their configuration files +with different names. + +Now follow steps: +1. Copy the configuration file to /usr/src/linux/.config. +2. Select the necessary options: make oldconfig +3. Compile your kernel image: make bzImage +4. Compile your modules: make modules +5. Copy your new kernel image for boot loader directory +6. Install the new modules: make modules_install +7. Generate an initial ramdisk image (`initrd`) if it is necessary. +8. Update your boot loader + + +#### Debug Filesystem + +This thread needs to attach a tracepoint to monitor when a process schedule an exit event. To allow this specific feaure, it is necessary to mount `debugfs` (`mount -t debugfs none /sys/kernel/debug/`). + + + +### Configuration + +#### File + +The configuration file name for this integration is `ebpf.d/process.conf`. + + +You can edit the configuration file using the `edit-config` script from the +Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory). + +```bash +cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata +sudo ./edit-config ebpf.d/process.conf +``` +#### Options + +All options are defined inside section `[global]`. + + +
Config options + +| Name | Description | Default | Required | +|:----|:-----------|:-------|:--------:| +| update every | Data collection frequency. | 5 | no | +| ebpf load mode | Define whether plugin will monitor the call (`entry`) for the functions or it will also monitor the return (`return`). | entry | no | +| apps | Enable or disable integration with apps.plugin | no | no | +| cgroups | Enable or disable integration with cgroup.plugin | no | no | +| pid table size | Number of elements stored inside hash tables used to monitor calls per PID. | 32768 | no | +| ebpf type format | Define the file type to load an eBPF program. Three options are available: `legacy` (Attach only `kprobe`), `co-re` (Plugin tries to use `trampoline` when available), and `auto` (plugin check OS configuration before to load). | auto | no | +| ebpf co-re tracing | Select the attach method used by plugin when `co-re` is defined in previous option. Two options are available: `trampoline` (Option with lowest overhead), and `probe` (the same of legacy code). This plugin will always try to attach a tracepoint, so option here will impact only function used to monitor task (thread and process) creation. | trampoline | no | +| maps per core | Define how plugin will load their hash maps. When enabled (`yes`) plugin will load one hash table per core, instead to have centralized information. | yes | no | +| lifetime | Set default lifetime for thread when enabled by cloud. | 300 | no | + +
+ +#### Examples +There are no configuration examples. + + -- cgit v1.2.3