consul+ansible+shell批量下发注册node_exporter
--日期：2020年7月21日
--作者：飞翔的小胖猪
文档功能说明
文档通过ansible+shell+consul的方式实现批量下发安装Linux操作系统监控的node_exporter软件，自动加载node_exporter软件到系统开机启动中并通过consul注册的功能。为部署prometheus系统做好前期准备。
适用范围
文档试用于centos、redhat系列操作系统。由于文档使用了ansible对主机操作，被管理端linux需要有python2.6以上的环境才能使用，对于centos和redhat系统默认只能控制6及以上的系统，6以下的操作系统需要单独的升级python版本。所有被管主机上请提前安装好wget工具。
注：
对于已有业务承载的6以下操作系统不建议升级python包来实现，该部分机器请手动下发软件及脚本。
环境准备
ansible服务器一台 批量操作控制主机节点
httpd服务器一台 存放soft文件和脚本文件
consul服务器一台 实现自动注册node_exporter到资源中
ansible和consul可以部署到一台设备上，也可以分开部署。文档中不涉及到ansible及consul服务的安装部署操作，如有需求请查看作者其他部署笔记或自己百度。
步骤
1.在ansible中添加被管控节点列表
2.编写脚本下发软件及脚本至服务器
3.实现node_exporter注册到consul中
4.检查查看consul注册情况
step1:配置ansible服务及ansible控制清单
文章不对ansible安装进行介绍，在ansible安装完成的前提下进行配置。进行配置前需要保证环境中以完成ansible软件安装。
配置首次通过ssh协议登录被控主机时不用敲yes。
修改/etc/ansible/ansible.cfg文件中的host_key_checking = False
# vim /etc/ansible/ansible.cfg
# additional paths to search for roles in, colon separated
#roles_path = /etc/ansible/roles
# uncomment this to disable SSH key host checking
host_key_checking = False
# change the default callback, you can only have one 'stdout' type enabled at a time.
修改/etc/ssh/ssh_config中StrictHostKeyChecking ask选项为StrictHostKeyChecking no
# vim /etc/ssh/ssh_config
# CheckHostIP yes
# AddressFamily any
# ConnectTimeout 0
StrictHostKeyChecking no
# IdentityFile ~/.ssh/id_rsa
# IdentityFile ~/.ssh/id_dsa
编辑/etc/ansible/hosts文件添加需要控制的主机清单，文档使用明文密码添加内容。
# vim /etc/ansible/hosts
[node_exporter_group] node_1 ansible_ssh_host=192.168.111.12 ansible_ssh_user=root ansible_ssh_pass=yinwan node_2 ansible_ssh_host=192.168.111.124 ansible_ssh_user=root ansible_ssh_pass=yinwan
配置说明：
ansible_ssh_host： 被控主机ip地址或域名
ansible_ssh_user： 被控主机可访问用户
ansible_ssh_pass： 对应ansible_ssh_user用户的密码
验证ansible服务配置成功，使用ansible调用命令查看被控主机主机名，如果正常能够显示出主机名。
查看ansible中一共有多少个被控主机
[root@prometheus ~]# ansible all --list
hosts (2):
node_1
node_2
[root@prometheus ~]#
查看被控主机的主机名，能够正常查看主机名表示主机能够被ansible服务控制，配置添加成功。
[root@prometheus ~]# ansible all -m shell -a 'hostname' node_2 | CHANGED | rc=0 >> docker_0001 node_1 | CHANGED | rc=0 >> ole6 [root@prometheus ~]#
step2：编写脚本下发软件及脚本至服务器
实验使用http放置node_exporter软件和各种脚本，客户主机通过wget可从http服务器获取到资源。在进行软件及脚本下发前需要读者自定搭建一个http服务，作者直接使用yum命令安装了一个httpd服务，把软件及脚本放置/var/www/html/soft/文件夹中。
脚本说明：
存放地址：/var/www/html/soft/
[root@prometheus ~]# ls -l /var/www/html/soft/ total 18300 -rw-r--r-- 1 root root 511 Jul 21 23:47 auto_consul_zc.sh -rw-r--r-- 1 root root 426 Jul 17 12:48 auto_start_node_exporter.sh drwxr-xr-x 4 root root 70 Jul 18 22:35 data -rw-r--r-- 1 root root 2578 Jul 21 22:56 get_soft.sh -rw-r--r-- 1 root root 9245080 Jul 17 11:44 node_exporter-1.0.0.linux-386.tar.gz -rw-r--r-- 1 root root 9476268 Jul 17 11:44 node_exporter-1.0.0.linux-amd64.tar.gz [root@prometheus ~]#
get_soft.sh：客户端主机下载node_exporter软件、node_exporter启动脚本。并且完成node_exporter安装。
auto_start_node_exporter.sh：客户端启动node_exporter脚本
auto_consul_zc.sh：使用/etc/ansible/hosts列表生成注册consul命令
auto_prometh_server.sh：启动prometheus+consul+alertmanager脚本
# vim get_soft.sh
#!/bin/bash if uname -a | grep -i _64 &> /dev/null ;then echo "64位处理方式" if [ -f /root/node_exporter-1.0.0.linux-amd64.tar.gz ];then echo ' node_exporter-1.0.0.linux-amd64.tar.gz file exist' else if timeout 20 wget -P /root http://192.168.111.83/soft/node_exporter-1.0.0.linux-amd64.tar.gz;then if [ -f /usr/local/node_exporter/node_exporter ];then echo "node_exporter file exist , not exec command. " else if [ -f /root/auto_start_node_exporter.sh ];then echo 'auto_start_node_exporter.sh exist ' else if timeout 20 wget -P /root http://192.168.111.83/soft/auto_start_node_exporter.sh;then if cat /etc/rc.d/rc.local | grep -i auto_start_node_exporter &> /dev/null ;then echo "file in auto startup low" else echo '/root/auto_start_node_exporter.sh' >> /etc/rc.d/rc.local chmod a+x /etc/rc.d/rc.local fi else echo 'auto_start_node_exporter.sh copy faile !! ' fi fi mkdir /scripts/soft/ -p tar -zxvf /root/node_exporter-1.0.0.linux-amd64.tar.gz -C /scripts/soft/ && mv /scripts/soft/node_exporter-1.0.0.linux-amd64/ /usr/local/node_exporter chmod a+x /root/auto_start_node_exporter.sh fi else echo "node_exporter soft_file copy faile !!" fi fi else echo "32位处理方式" if [ -f /root/node_exporter-1.0.0.linux-amd64.tar.gz ];then echo ' node_exporter-1.0.0.linux-amd64.tar.gz file exist' else if timeout 20 wget -P /root http://192.168.111.83/soft/node_exporter-1.0.0.linux-386.tar.gz;then if [ -f /usr/local/node_exporter/node_exporter ];then echo "node_exporter file exist , not exec command. " else if [ -f /root/auto_start_node_exporter.sh ];then echo 'auto_start_node_exporter.sh exist ' else if timeout 20 wget -P /root http://192.168.111.83/soft/auto_start_node_exporter.sh;then if cat /etc/rc.d/rc.local | grep -i auto_start_node_exporter &> /dev/null ;then echo "file in auto startup low" else echo '/root/auto_start_node_exporter.sh' >> /etc/rc.d/rc.local chmod a+x /etc/rc.d/rc.local fi else echo 'auto_start_node_exporter.sh copy faile !! ' fi fi mkdir /scripts/soft/ -p tar -zxvf /root/node_exporter-1.0.0.linux-386.tar.gz -C /scripts/soft/ && mv /scripts/soft/node_exporter-1.0.0.linux-386/ /usr/local/node_exporter chmod a+x /root/auto_start_node_exporter.sh fi else echo "node_exporter soft_file copy faile !!" fi fi fi
# vim auto_start_node_exporter.sh
#!/bin/bash if which netstat &> /dev/null;then if netstat -alntup | grep -i 9100 &> /dev/null;then echo "9100 port exist netstat !" else /usr/local/node_exporter/node_exporter &> /dev/null & fi elif which ss &> /dev/null ;then if ss -alntup | grep -i 9100 &> /dev/null;then echo "9100 port exist ss ! " else /usr/local/node_exporter/node_exporter &> /dev/null & fi else echo "未知错误，不启动程序" fi
# vim auto_consul_zc.sh
#!/bin/bash cat /etc/ansible/hosts | grep -v '\[' | grep -v ^$ | sed 's/=/ /' | awk '{print $1,$3}' > /prometheus/tmp_consul_list.txt sleep 1 cat /prometheus/tmp_consul_list.txt | while read host_name host_addr do echo " curl -X PUT -d ' {\"id\": \"${host_name}\",\"name\": \"${host_name}\",\"address\": \"${host_addr}\",\"port\": 9100,\"tags\": [\"test\",\"node\",\"linux\"],\"checks\": [{\"http\": \"http://${host_addr}:9100/metrics\", \"interval\": \"5s\"}]}' http://192.168.111.83:8500/v1/agent/service/register " done
# vim auto_prometh_server.sh
#!/bin/bash sleep 1 prometheus --config.file="/usr/local/prometheus/prometheus.yml" --storage.tsdb.retention.time=90d &> /dev/null & consul agent -server -bootstrap-expect 1 -data-dir=/usr/local/consul_data/data -ui -bind 192.168.111.83 -client 0.0.0.0 &> /dev/null & alertmanager --config.file=/usr/local/alertmanager/alertmanager.yml --cluster.advertise-address=0.0.0.0:9093 &> /dev/null &
执行ansible批量下发node_exporter和启动脚本并在主机端自动安装node_exporter软件加入启动脚本到开机启动。
在下发之前需要确认被控主机节点有wget命令，如果没有wget命令则需要先完成wget安装。
[root@prometheus ~]# ansible all -m shell -a 'which wget ' node_1 | CHANGED | rc=0 >> /usr/bin/wget node_2 | CHANGED | rc=0 >> /usr/bin/wget
使用ansible的script模块执行脚本/var/www/html/soft/get_soft.sh
[root@prometheus ~]# ansible all -m script -a '/var/www/html/soft/get_soft.sh' node_2 | CHANGED => { "changed": true, "rc": 0, "stderr": "Shared connection to 192.168.111.124 closed.\r\n", "stderr_lines": [ "Shared connection to 192.168.111.124 closed." ], "stdout": "64位处理方式\r\n--2020-07-22 15:09:35-- http://192.168.111.83/soft/node_exporter-1.0.0.linux-amd64.tar.gz\r\nConnecting to 192.168.111.83:80... connected.\r\nHTTP request sent, awaiting response... 200 OK\r\nLength: 9476268 (9.0M) [application/x-gzip]\r\nSaving to: ‘/root/node_exporter-1.0.0.linux-amd64.tar.gz’\r\n\r\n\r 0% [ ] 0 --.-K/s \r100%[======================================>] 9,476,268 --.-K/s in 0.05s \r\n\r\n2020-07-22 15:09:35 (188 MB/s) - ‘/root/node_exporter-1.0.0.linux-amd64.tar.gz’ saved [9476268/9476268]\r\n\r\n--2020-07-22 15:09:35-- http://192.168.111.83/soft/auto_start_node_exporter.sh\r\nConnecting to 192.168.111.83:80... connected.\r\nHTTP request sent, awaiting response... 200 OK\r\nLength: 426 [application/x-sh]\r\nSaving to: ‘/root/auto_start_node_exporter.sh’\r\n\r\n\r 0% [ ] 0 --.-K/s \r100%[======================================>] 426 --.-K/s in 0s \r\n\r\n2020-07-22 15:09:35 (77.3 MB/s) - ‘/root/auto_start_node_exporter.sh’ saved [426/426]\r\n\r\nnode_exporter-1.0.0.linux-amd64/\r\nnode_exporter-1.0.0.linux-amd64/node_exporter\r\nnode_exporter-1.0.0.linux-amd64/NOTICE\r\nnode_exporter-1.0.0.linux-amd64/LICENSE\r\n", "stdout_lines": [ "64位处理方式", "--2020-07-22 15:09:35-- http://192.168.111.83/soft/node_exporter-1.0.0.linux-amd64.tar.gz", "Connecting to 192.168.111.83:80... connected.", "HTTP request sent, awaiting response... 200 OK", "Length: 9476268 (9.0M) [application/x-gzip]", "Saving to: ‘/root/node_exporter-1.0.0.linux-amd64.tar.gz’", "", "", " 0% [ ] 0 --.-K/s ", "100%[======================================>] 9,476,268 --.-K/s in 0.05s ", "", "2020-07-22 15:09:35 (188 MB/s) - ‘/root/node_exporter-1.0.0.linux-amd64.tar.gz’ saved [9476268/9476268]", "", "--2020-07-22 15:09:35-- http://192.168.111.83/soft/auto_start_node_exporter.sh", "Connecting to 192.168.111.83:80... connected.", "HTTP request sent, awaiting response... 200 OK", "Length: 426 [application/x-sh]", "Saving to: ‘/root/auto_start_node_exporter.sh’", "", "", " 0% [ ] 0 --.-K/s ", "100%[======================================>] 426 --.-K/s in 0s ", "", "2020-07-22 15:09:35 (77.3 MB/s) - ‘/root/auto_start_node_exporter.sh’ saved [426/426]", "", "node_exporter-1.0.0.linux-amd64/", "node_exporter-1.0.0.linux-amd64/node_exporter", "node_exporter-1.0.0.linux-amd64/NOTICE", "node_exporter-1.0.0.linux-amd64/LICENSE" ] } node_1 | CHANGED => { "changed": true, "rc": 0, "stderr": "Shared connection to 192.168.111.12 closed.\r\n", "stderr_lines": [ "Shared connection to 192.168.111.12 closed." ], "stdout": "64位处理方式\r\n--2020-07-22 15:09:35-- http://192.168.111.83/soft/node_exporter-1.0.0.linux-amd64.tar.gz\r\nConnecting to 192.168.111.83:80... connected.\r\nHTTP request sent, awaiting response... 200 OK\r\nLength: 9476268 (9.0M) [application/x-gzip]\r\nSaving to: “/root/node_exporter-1.0.0.linux-amd64.tar.gz”\r\n\r\n\r 0% [ ] 0 --.-K/s \r68% [=========================> ] 6,524,944 31.0M/s \r100%[======================================>] 9,476,268 27.7M/s in 0.3s \r\n\r\n2020-07-22 15:09:35 (27.7 MB/s) - “/root/node_exporter-1.0.0.linux-amd64.tar.gz” saved [9476268/9476268]\r\n\r\n--2020-07-22 15:09:35-- http://192.168.111.83/soft/auto_start_node_exporter.sh\r\nConnecting to 192.168.111.83:80... connected.\r\nHTTP request sent, awaiting response... 200 OK\r\nLength: 426 [application/x-sh]\r\nSaving to: “/root/auto_start_node_exporter.sh”\r\n\r\n\r 0% [ ] 0 --.-K/s \r100%[======================================>] 426 --.-K/s in 0s \r\n\r\n2020-07-22 15:09:35 (116 MB/s) - “/root/auto_start_node_exporter.sh” saved [426/426]\r\n\r\nnode_exporter-1.0.0.linux-amd64/\r\nnode_exporter-1.0.0.linux-amd64/node_exporter\r\nnode_exporter-1.0.0.linux-amd64/NOTICE\r\nnode_exporter-1.0.0.linux-amd64/LICENSE\r\n", "stdout_lines": [ "64位处理方式", "--2020-07-22 15:09:35-- http://192.168.111.83/soft/node_exporter-1.0.0.linux-amd64.tar.gz", "Connecting to 192.168.111.83:80... connected.", "HTTP request sent, awaiting response... 200 OK", "Length: 9476268 (9.0M) [application/x-gzip]", "Saving to: “/root/node_exporter-1.0.0.linux-amd64.tar.gz”", "", "", " 0% [ ] 0 --.-K/s ", "68% [=========================> ] 6,524,944 31.0M/s ", "100%[======================================>] 9,476,268 27.7M/s in 0.3s ", "", "2020-07-22 15:09:35 (27.7 MB/s) - “/root/node_exporter-1.0.0.linux-amd64.tar.gz” saved [9476268/9476268]", "", "--2020-07-22 15:09:35-- http://192.168.111.83/soft/auto_start_node_exporter.sh", "Connecting to 192.168.111.83:80... connected.", "HTTP request sent, awaiting response... 200 OK", "Length: 426 [application/x-sh]", "Saving to: “/root/auto_start_node_exporter.sh”", "", "", " 0% [ ] 0 --.-K/s ", "100%[======================================>] 426 --.-K/s in 0s ", "", "2020-07-22 15:09:35 (116 MB/s) - “/root/auto_start_node_exporter.sh” saved [426/426]", "", "node_exporter-1.0.0.linux-amd64/", "node_exporter-1.0.0.linux-amd64/node_exporter", "node_exporter-1.0.0.linux-amd64/NOTICE", "node_exporter-1.0.0.linux-amd64/LICENSE" ] } [root@prometheus ~]#
确认客户端上是否存在node_exporter软件，如果存在/usr/local/node_exporter/node_exporter文件表示软件安装成功。
[root@prometheus ~]# ansible all -m shell -a ' ls -l /usr/local/node_exporter/node_exporter ' node_1 | CHANGED | rc=0 >> -rwxr-xr-x 1 3434 3434 19572271 May 26 14:02 /usr/local/node_exporter/node_exporter node_2 | CHANGED | rc=0 >> -rwxr-xr-x 1 3434 3434 19572271 May 26 14:02 /usr/local/node_exporter/node_exporter [root@prometheus ~]#
rc=0表示命令有返回值，则表示文件存在，软件安装成功。
确认客户端上是否存在auto_start_node_exporter.sh启动脚本，如果存在/root/auto_start_node_exporter.sh则启动脚本获取成功。
[root@prometheus ~]# ansible all -m shell -a ' ls -l /root/auto_start_node_exporter.sh ' node_1 | CHANGED | rc=0 >> -rwxr-xr-x 1 root root 426 Jul 17 12:48 /root/auto_start_node_exporter.sh node_2 | CHANGED | rc=0 >> -rwxr-xr-x 1 root root 426 Jul 17 12:48 /root/auto_start_node_exporter.sh [root@prometheus ~]#
rc=0表示命令有返回值，则表示启动脚本存在。
确认客户端上是否成功添加启动脚本到开机启动，如果/etc/rc.d/rc.local中有/root/auto_start_node_exporter.sh行则开机启动添加成功。
[root@prometheus ~]# ansible all -m shell -a ' cat /etc/rc.d/rc.local | grep -i auto_start_node_exporter ' node_1 | CHANGED | rc=0 >> /root/auto_start_node_exporter.sh node_2 | CHANGED | rc=0 >> /root/auto_start_node_exporter.sh [root@prometheus ~]#
rc=0表示命令有返回值，则表示/etc/rc.d/rc.local文件中有/root/auto_start_node_exporter.sh行，表示脚本开机启动配置完成。
通过命令启动客户端的node_exporter软件，启动后查看客户主机上9100端口是否处于监听状态。
[root@prometheus ~]# ansible all -m shell -a 'nohup /root/auto_start_node_exporter.sh ' node_1 | CHANGED | rc=0 >> nohup: ignoring input node_2 | CHANGED | rc=0 >> nohup: ignoring input [root@prometheus ~]#
调用客户端脚本启动node_exporter软件。
确认客户端9100端口由node_exporter软件监听。
[root@prometheus ~]# ansible all -m shell -a 'ss -alntup | grep -i 9100 '
node_1 | CHANGED | rc=0 >>
tcp LISTEN 0 128 :::9100 :::* users:(("node_exporter",3913,3))
node_2 | CHANGED | rc=0 >>
tcp LISTEN 0 128 :::9100 :::* users:(("node_exporter",pid=10833,fd=3)
9100端口启动表示node_exporter软件安装完成。
step3：注册客户端node_exporter到consul
使用shell脚本从/etc/ansible/hosts中提取被控主机信息，自动生成注册consul命令。
在进行该步骤前需要提前完成consul软件的安装与配置。
[root@prometheus ~]# source /var/www/html/soft/auto_consul_zc.sh
curl -X PUT -d '{"id": "node_1","name": "node_1","address": "192.168.111.12","port": 9100,"tags": ["test","node","linux"],"checks": [{"http": "http://192.168.111.12:9100/metrics", "interval": "5s"}]}' http://192.168.111.83:8500/v1/agent/service/register
curl -X PUT -d '{"id": "node_2","name": "node_2","address": "192.168.111.124","port": 9100,"tags": ["test","node","linux"],"checks": [{"http": "http://192.168.111.124:9100/metrics", "interval": "5s"}]}' http://192.168.111.83:8500/v1/agent/service/register
注：
auto_consul_zc.sh脚本中http://192.168.111.83:8500/v1/agent/service/register中的ip地址是写死的，读者请根据自己的consul服务器地址修改。
复制脚本生成的命令并执行。
[root@prometheus ~]# curl -X PUT -d '{"id": "node_1","name": "node_1","address": "192.168.111.12","port": 9100,"tags": ["test","node","linux"],"checks": [{"http": "http://192.168.111.12:9100/metrics", "interval": "5s"}]}' http://192.168.111.83:8500/v1/agent/service/register
[root@prometheus ~]#
[root@prometheus ~]# curl -X PUT -d '{"id": "node_2","name": "node_2","address": "192.168.111.124","port": 9100,"tags": ["test","node","linux"],"checks": [{"http": "http://192.168.111.124:9100/metrics", "interval": "5s"}]}' http://192.168.111.83:8500/v1/agent/service/register
step4：确认consul注册信息
使用网页浏览器打开输入consul服务器的地址端口查看界面中是否有新注册服务器，如果有则表示注册成功。
能够在web界面查看到节点表示节点注册成功，此时可以在prometheus中添加consul资源实现对数据的收集工作。
