用Ansible来设置Mackerel的自定义度量设置

运行环境

ansibleコントロールノード

[root@localhost ~]# cat /etc/redhat-release
AlmaLinux release 9.1 (Lime Lynx)

[root@localhost ~]# python3 -V
Python 3.9.14

ansibleターゲットノード

[root@vm-001 ~]# cat /etc/redhat-release
AlmaLinux release 8.8 (Sapphire Caracal)

[root@vm-001 ~]# python3 -V
Python 3.6.8

我想要做的事情

对于目标节点（本次为一台），执行以下操作。

1. 在”/opt/scripts”目录下创建”mackerel”文件夹

1. 将”test.sh”文件放置在”/opt/scripts/mackerel”文件夹中，用于自定义指标

1. 更新”mackerel-agent.conf”配置文件

1. 停止”mackerel-agent.service”服务

启动”mackerel-agent.service”服务

ansible 目录结构中的控制节点

[root@localhost ansible]# pwd
/etc/ansible
[root@localhost ansible]# ls -l
合計 8
-rw-r--r--. 1 root root  739  8月 20 18:19 ansible.cfg
-rw-r--r--. 1 root root 1018  8月 20 17:24 hosts
drwxr-xr-x. 2 root root   27  8月 20 23:11 inventory
drwxr-xr-x. 2 root root   25  8月 20 18:20 log
drwxr-xr-x. 2 root root   58  8月 20 23:31 playbook
drwxr-xr-x. 2 root root    6  4月 14 17:29 roles

执行playbook

- hosts: vm-001
  tasks:
    - name: Create directory
      ansible.builtin.file:
        path: /opt/scripts/mackerel
        state: directory
        mode: 0755

    - name: Copy test.sh
      ansible.builtin.copy:
        src: /opt/scripts/test.sh
        dest: /opt/scripts/mackerel/test.sh
        mode: 0644

    - name: Update mackerel-agent.conf
      ansible.builtin.copy:
        src: /tmp/mackerel/mackerel-agent.conf
        dest: /etc/mackerel-agent/mackerel-agent.conf

    - name: Stop mackerel-agent.service
      service:
        name: mackerel-agent
        state: stopped

    - name: Start mackerel-agent.service
      service:
        name: mackerel-agent
        state: started

执行playbook

确定执行

确认在/opt/scripts目录下创建了mackerel文件夹。

已经制作完成。

[root@vm-001 scripts]# ls -ld /opt/scripts/mackerel/
drwxr-xr-x. 2 root root 21 Aug 20 14:53 /opt/scripts/mackerel/

请确认用于自定义度量的test.sh的位置。

已经设置。

[root@vm-001 scripts]# cat /opt/scripts/mackerel/test.sh
#!/bin/bash

unix_time=$(date +%s)
value=$(ps -ef | wc -l)
name="test.process_count"

echo -e "${name}\t${value}\t${unix_time}"

确认mackerel-agent.conf文件的更新

更新了添加了自定义指标设置的文件。

[root@vm-001 scripts]# tail /etc/mackerel-agent/mackerel-agent.conf
# command = "MUNIN_LIBDIR=/usr/share/munin mackerel-plugin-munin -plugin=/usr/share/munin/plugins/postfix_mailqueue -name=postfix.mailqueue"

# followings are other samples
# [plugin.metrics.vmstat]
# command = "ruby /etc/sensu/plugins/system/vmstat-metrics.rb"
# [plugin.metrics.curl]
# command = "ruby /etc/sensu/plugins/http/metrics-curl.rb"

[plugin.metrics.test]
command = "bash /opt/scripts/mackerel/test.sh"

确认停止启动mackerel-agent.service。

已经启动。（目标节点的时间设置为协调世界时）

● mackerel-agent.service - mackerel.io agent
   Loaded: loaded (/usr/lib/systemd/system/mackerel-agent.service; enabled; vendor preset: disabled)
   Active: active (running) since Sun 2023-08-20 14:53:54 UTC; 2min 27s ago
     Docs: https://mackerel.io/
  Process: 7595 ExecStopPost=/bin/sh -c [ "$AUTO_RETIREMENT" == "" ] || [ "$AUTO_RETIREMENT" == "0" ] && true || /usr/bin/mackerel-agent retire -force --root $ROOT $OTHER_OPTS (code=exited, status=0/SUCCESS)
  Process: 7737 ExecStartPre=/usr/bin/mkdir -m 777 -p $MACKEREL_PLUGIN_WORKDIR (code=exited, status=0/SUCCESS)
 Main PID: 7739 (mackerel-agent)
    Tasks: 13 (limit: 2083)
   Memory: 10.8M
   CGroup: /system.slice/mackerel-agent.service
           tq7739 /usr/bin/mackerel-agent supervise --root /var/lib/mackerel-agent
           mq7743 /usr/bin/mackerel-agent --root /var/lib/mackerel-agent -child

Aug 20 14:53:54 vm-001 systemd[1]: Starting mackerel.io agent...
Aug 20 14:53:54 vm-001 systemd[1]: Started mackerel.io agent.
Aug 20 14:53:54 vm-001 mackerel-agent[7743]: 2023/08/20 14:53:54 INFO <main> Starting mackerel-agent version:0.77.1, rev:8bb573e, apibase:https://api.mackerelio.com
Aug 20 14:53:55 vm-001 mackerel-agent[7743]: 2023/08/20 14:53:55 INFO <command> Start: apibase = https://api.mackerelio.com, hostName = vm-001, hostID = ********

青鱼自定义指标提交确认