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Chrony

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Chrony 采集器用于采集 Chrony 服务器相关的指标数据。

Chrony 采集器支持远程采集，采集器 Datakit 可以运行在多种操作系统中。

配置

前置条件

  • 安装 Chrony 服务
$ yum -y install chrony    # [On CentOS/RHEL]
...

$ apt install chrony       # [On Debian/Ubuntu]
...

$ dnf -y install chrony    # [On Fedora 22+]
...
  • 验证是否正确安装，在命令行执行如下指令，得到类似结果：
$ chronyc -n tracking
Reference ID    : CA760151 (202.118.1.81)
Stratum         : 2
Ref time (UTC)  : Thu Jun 08 07:28:42 2023
System time     : 0.000000000 seconds slow of NTP time
Last offset     : -1.841502666 seconds
RMS offset      : 1.841502666 seconds
Frequency       : 1.606 ppm slow
Residual freq   : +651.673 ppm
Skew            : 0.360 ppm
Root delay      : 0.058808800 seconds
Root dispersion : 0.011350543 seconds
Update interval : 0.0 seconds
Leap status     : Normal

进入 DataKit 安装目录下的 conf.d/chrony 目录，复制 chrony.conf.sample 并命名为 chrony.conf。示例如下：

[[inputs.chrony]]
  ## (Optional) Collect interval, default is 30 seconds
  # interval = "30s"

  ## (Optional) Exec chronyc timeout, default is 8 seconds
  # timeout = "8s"

  ## (Optional) The binPath of chrony
  bin_path = "chronyc"

  ## (Optional) Remote chrony servers
  ## If use remote chrony servers, election must be true
  ## If use remote chrony servers, bin_paths should be shielded
  # remote_addrs = ["<ip>:22"]
  # remote_users = ["<remote_login_name>"]
  # remote_passwords = ["<remote_login_password>"]
  ## If use remote_rsa_path, remote_passwords should be shielded
  # remote_rsa_paths = ["/home/<your_name>/.ssh/id_rsa"]
  # remote_command = "chronyc -n tracking"

  ## Set true to enable election
  election = false

[inputs.chrony.tags]
  # some_tag = "some_value"
  # more_tag = "some_other_value"

配置好后，重启 DataKit 即可。

支持以环境变量的方式修改配置参数（只在 Datakit 以 K8s DaemonSet 方式运行时生效，主机部署的 Datakit 不支持此功能）：

环境变量名 对应的配置参数项 参数示例
ENV_INPUT_CHRONY_INTERVAL interval "30s" ("10s" ~ "60s")
ENV_INPUT_CHRONY_TIMEOUT timeout "8s" ("5s" ~ "30s")
ENV_INPUT_CHRONY_BIN_PATH bin_path "chronyc"
ENV_INPUT_CHRONY_REMOTE_ADDRS remote_addrs ["192.168.1.1:22"]
ENV_INPUT_CHRONY_REMOTE_USERS remote_users ["remote_login_name"]
ENV_INPUT_CHRONY_REMOTE_RSA_PATHS remote_rsa_paths ["/home/<your_name>/.ssh/id_rsa"]
ENV_INPUT_CHRONY_REMOTE_COMMAND remote_command "chronyc -n tracking"
ENV_INPUT_CHRONY_TAGS tags tag1=value1,tag2=value2 如果配置文件中有同名 tag，会覆盖它
ENV_INPUT_CHRONY_ELECTION election "true" or "false"

指标

chrony

  • 标签
Tag Description
host Host name
leap_status This is the leap status, which can be Normal, Insert second, Delete second or Not synchronized.
reference_id This is the reference ID and name (or IP address) of the server to which the computer is currently synchronized.
stratum The stratum indicates how many hops away from a computer with an attached reference clock we are.
  • 指标列表
Metric Description Type Unit
frequency This is the rate by which the system clock would be wrong if chronyd was not correcting it. float PPM
last_offset This is the estimated local offset on the last clock update. float sec
residual_freq This shows the residual frequency for the currently selected reference source. float PPM
rms_offset This is a long-term average of the offset value. float sec
root_delay This is the total of the network path delays to the stratum-1 computer from which the computer is ultimately synchronized. float sec
root_dispersion This is the total dispersion accumulated through all the computers back to the stratum-1 computer from which the computer is ultimately synchronized. float sec
skew This is the estimated error bound on the frequency. float PPM
system_time This is the current offset between the NTP clock and system clock. float sec
update_interval This is the interval between the last two clock updates. float sec

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