本节重点介绍 :
- 黑白名单的配置方法
- 为何会有默认开始的默认关闭的采集模块
项目地址
查看启动日志
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.315Z caller=node_exporter.go:178 msg="Starting node_exporter" version="(version=1.1.2, branch=HEAD, revision=b597c1244d7bef49e6f3359c87a56dd7707f6719)"
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.315Z caller=node_exporter.go:179 msg="Build context" build_context="(go=go1.15.8, user=root@f07de8ca602a, date=20210305-09:29:10)"
Mar 29 15:38:51 prome_master_01 node_exporter: level=warn ts=2021-03-29T07:38:51.315Z caller=node_exporter.go:181 msg="Node Exporter is running as root user. This exporter is designed to run as unpriviledged user, root is not required."
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=filesystem_common.go:74 collector=filesystem msg="Parsed flag --collector.filesystem.ignored-mount-points" flag=^/(dev|proc|sys|var/lib/docker/.+)($|/)
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=filesystem_common.go:76 collector=filesystem msg="Parsed flag --collector.filesystem.ignored-fs-types" flag=^(autofs|binfmt_misc|bpf|cgroup2?|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|iso9660|mqueue|nsfs|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|selinuxfs|squashfs|sysfs|tracefs)$
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:106 msg="Enabled collectors"
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=arp
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=bcache
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=bonding
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=btrfs
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=conntrack
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=cpu
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=cpufreq
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=diskstats
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=edac
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=entropy
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=fibrechannel
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=filefd
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=filesystem
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=hwmon
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=infiniband
Mar 29 15:38:51 prome_master_01 node_exporter: level=info ts=2021-03-29T07:38:51.316Z caller=node_exporter.go:113 collector=ipvs本机curl访问数据
[root@prome_master_01 tgzs]# curl -s localhost:9100/metrics |grep node_ |head -20
# HELP node_arp_entries ARP entries by device
# TYPE node_arp_entries gauge
node_arp_entries{device="eth0"} 3
# HELP node_boot_time_seconds Node boot time, in unixtime.
# TYPE node_boot_time_seconds gauge
node_boot_time_seconds 1.616987084e+09
# HELP node_context_switches_total Total number of context switches.
# TYPE node_context_switches_total counter
node_context_switches_total 2.105979e+06
# HELP node_cooling_device_cur_state Current throttle state of the cooling device
# TYPE node_cooling_device_cur_state gauge
node_cooling_device_cur_state{name="0",type="Processor"} 0
node_cooling_device_cur_state{name="1",type="Processor"} 0
node_cooling_device_cur_state{name="2",type="Processor"} 0
node_cooling_device_cur_state{name="3",type="Processor"} 0
# HELP node_cooling_device_max_state Maximum throttle state of the cooling device
# TYPE node_cooling_device_max_state gauge
node_cooling_device_max_state{name="0",type="Processor"} 0
node_cooling_device_max_state{name="1",type="Processor"} 0
node_cooling_device_max_state{name="2",type="Processor"} 0默认开启的采集项目介绍
黑名单: 关闭某一项默认开启的采集项
--no-collector.<name> flag
# 未开启前
[root@prome_master_01 node_exporter]# curl -s localhost:9100/metrics |grep node_cpu
# HELP node_cpu_guest_seconds_total Seconds the CPUs spent in guests (VMs) for each mode.
# TYPE node_cpu_guest_seconds_total counter
node_cpu_guest_seconds_total{cpu="0",mode="nice"} 0
node_cpu_guest_seconds_total{cpu="0",mode="user"} 0
node_cpu_guest_seconds_total{cpu="1",mode="nice"} 0
node_cpu_guest_seconds_total{cpu="1",mode="user"} 0
node_cpu_guest_seconds_total{cpu="2",mode="nice"} 0
node_cpu_guest_seconds_total{cpu="2",mode="user"} 0
node_cpu_guest_seconds_total{cpu="3",mode="nice"} 0
node_cpu_guest_seconds_total{cpu="3",mode="user"} 0
# HELP node_cpu_seconds_total Seconds the CPUs spent in each mode.
# TYPE node_cpu_seconds_total counter
node_cpu_seconds_total{cpu="0",mode="idle"} 17691.27
node_cpu_seconds_total{cpu="0",mode="iowait"} 8.9
node_cpu_seconds_total{cpu="0",mode="irq"} 0
node_cpu_seconds_total{cpu="0",mode="nice"} 0.32
node_cpu_seconds_total{cpu="0",mode="softirq"} 0.28
node_cpu_seconds_total{cpu="0",mode="steal"} 2.7关闭cpu采集
- ./node_exporter --no-collector.cpu
- curl -s localhost:9100/metrics |grep node_cpu
白名单：关闭默认采集项而只开启某些采集
--collector.disable-defaults --collector.<name> .
# 只开启mem采集
./node_exporter --collector.disable-defaults --collector.meminfo
# 只开启mem 和cpu 采集
./node_exporter --collector.disable-defaults --collector.meminfo --collector.cpu默认关闭的原因
- 太重：High cardinality
- 太慢：Prolonged runtime that exceeds the Prometheus scrape_interval or scrape_timeout
- 太多资源开销： Significant resource demands on the host
本节重点总结 :
- 黑白名单的配置方法 --collector.
<name>--no-collector.<name> - 为何会有默认开始的默认关闭的采集模块
- 想做成模块化，用户传入哪些模块，再开启
- 有些不能默认开启，因为很重，很慢
