假如现在有多台机器10.1.2.3,10.1.2.4,10.1.2.5 需要同时部署node exporter.
单个弄挺麻烦的，而且可能有加机器的需求，最好的办法是写好模板，改下IP重新运行就能部署上去了
之前有尝试ansible , 正好可以用上
按照上文提到的方式，ansible的配置文件地址在/etc/ansible/hosts
配置文件支持ini格式或者yaml格式，这里使用的是yaml
1 2 3 4 5 6 7 all: children: node_exporters: hosts: 10.1.2.3: 10.1.2.4: 10.1.2.5:
对于连续的ip地址，可以用范围来表示
1 2 3 4 5 all: children: node_exporters: hosts: 10.1 .2 .[3-5]:
详细的有关范围相关的配置可以参见官方文档
配置完成后，需要设置账户机器之间的互信
多台机器的批量验证可以参考如下脚本
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 # !/bin/bash # # ./ssh_no_password.sh $user_pwd $ip_list # CUR_DIR=$(cd `dirname $0 `; pwd ) if [ $# -lt 2 ]; then echo "FATAL para not enough" exit 1 fi USER_PWD=$1 IP_LIST=$2 # 如果不存在签名文件，生成一份 if [ ! -f /home/$USER/.ssh/id_rsa ]; then expect -c " spawn ssh-keygen -t rsa expect { \"*key*\" {send \"\r\"; exp_continue} \"*passphrase*\" {send \"\r\"; exp_continue} \"*again*\" {send \"\r\";} } " fi # 用 expect 来实现自动填写密码 for IP in $(cat $IP_LIST) do expect -c " spawn ssh-copy-id -i /home/$USER/.ssh/id_rsa $USER@$IP expect { \"*yes/no*\" {send \"yes\r\"; exp_continue} \"*password*\" {send \"$USER_PWD\r\"; exp_continue} \"*Password*\" {send \"$USER_PWD\r\";} } " done for IP in $(cat $IP_LIST) do expect -c " spawn ssh $USER@$IP "exit" expect { \"*yes/no*\" {send \"yes\r\"; exp_continue} } " done
完成后，可以使用如下方法验证
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 $ ansible node_exporters -m ping 10.1.2.3 | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python" }, "changed": false, "ping": "pong" } 10.1.2.4 | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python" }, "changed": false, "ping": "pong" } 10.1.2.5 | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python" }, "changed": false, "ping": "pong" }
ansible playbook的使用方法，官方文档 讲的很仔细，这里就不再赘述了
上面的验证用playbook来写就是这样
1 2 3 4 5 6 7 - hosts: node_exporters remote_user: root tasks: - name: test connection ping: remote_user: root
测试如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 $ ansible-playbook ping.yml PLAY [node_exporters] *************************************************************************************************************** TASK [Gathering Facts] ************************************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [test connection] ************************************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] PLAY RECAP ************************************************************************************************************************** 10.1.2.3 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 10.1.2.4 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 10.1.2.5 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
为了保证重新执行playbook是安全的，需要先对每一步操作的状态做校验，以保证整体操作的幂等性
在jinja2 语法外面加引号，是因为 yaml gotcha
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 - hosts: node_exporters remote_user: root vars: node_exporter: node_exporter-0.18.1.linux-amd64 dest_dir: /tmp/4t deploy_user: your_user_name node_port: 9100 tasks: - name: test connection ping: - name: create directory if they dont exist file: path: "{{ dest_dir }} " state: directory mode: 0775 - name: extract files unarchive: src: "/home/{{ deploy_user }} /installs/{{ node_exporter }} .tar.gz" dest: "{{ dest_dir }} " force: no mode: 0755 - name: start node_exporter shell: "nohup {{ dest_dir }} /{{ node_exporter }} /node_exporter --web.listen-address=':{{ node_port }} ' &" - wait_for: host: 127.0 .0 .1 port: "{{ node_port }} " timeout: 1 - debug: msg=ok
运行结果如下
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 $ ansible-playbook node.yml PLAY [node_exporters] *************************************************************************************************************** TASK [Gathering Facts] ************************************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [test connection] ************************************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [create directory if they dont exist] ****************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [extract files] **************************************************************************************************************** ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [start node_exporter] ********************************************************************************************************** changed: [10.1.2.3] changed: [10.1.2.4] changed: [10.1.2.5] TASK [wait_for] ********************************************************************************************************************* ok: [10.1.2.3] ok: [10.1.2.4] ok: [10.1.2.5] TASK [debug] ************************************************************************************************************************ ok: [10.1.2.3] => { "msg" : "ok" } ok: [10.1.2.4] => { "msg" : "ok" } ok: [10.1.2.5] => { "msg" : "ok" } PLAY RECAP ************************************************************************************************************************** 10.1.2.3 : ok=7 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 10.1.2.4 : ok=7 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 10.1.2.5 : ok=7 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0