1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
<!--startmeta
custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/ebpf.plugin/integrations/ebpf_oomkill.md"
meta_yaml: "https://github.com/netdata/netdata/edit/master/collectors/ebpf.plugin/metadata.yaml"
sidebar_label: "eBPF OOMkill"
learn_status: "Published"
learn_rel_path: "Data Collection/eBPF"
most_popular: False
message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
endmeta-->
# eBPF OOMkill
<img src="https://netdata.cloud/img/ebpf.jpg" width="150"/>
Plugin: ebpf.plugin
Module: oomkill
<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
## Overview
Monitor applications that reach out of memory.
Attach tracepoint 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 cgroup
These metrics show cgroup/service that reached OOM.
This scope has no labels.
Metrics:
| Metric | Dimensions | Unit |
|:------|:----------|:----|
| cgroup.oomkills | cgroup name | kills |
| services.oomkills | a dimension per systemd service | kills |
### Per apps
These metrics show cgroup/service that reached OOM.
Labels:
| Label | Description |
|:-----------|:----------------|
| app_group | The name of the group defined in the configuration. |
Metrics:
| Metric | Dimensions | Unit |
|:------|:----------|:----|
| app.oomkill | kills | kills |
## 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/oomkill.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/oomkill.conf
```
#### Options
Overwrite default configuration reducing number of I/O events
#### Examples
There are no configuration examples.
## Troubleshooting
### update every
### ebpf load mode
### lifetime
|
