生产实践：
falcon-agent一键安装脚本
学习技巧：
Shell EOF使用、添加定时任务
脚本内容：
隔离区三方项目机器很多没有人维护，也没有统一监控，需要把基础监控全部收敛到公司falcon监控上，弄一个一键安装脚本来安装方便点，不考虑啥健壮性，能用就行。
#!/bin/bash
#
# install_falcon_agent.sh
#
# create by anzhihe@foxmail.com 20221011
#
INSTALL_DIR="/home/anzhihe/app"
FALCON_DIR="/home/anzhihe/app/falcon_agentd"
CONFIG_FILE="${FALCON_DIR}/cfg.json"
# falcon-agent下载
download_agent() {
if [ ! -d ${FALCON_DIR} ]; then
mkdir -p ${INSTALL_DIR} && cd ${INSTALL_DIR} && wget https://file.chegva.com/sre/install_package/falcon_agentd.tar.gz && tar -zxf falcon_agentd.tar.gz
else
echo "falcon_agentd目录已存在，退出安装！"
exit 1
fi
}
# 添加配置文件
add_config() {
hostname=`hostname`
cat << EOF > ${CONFIG_FILE}
{
"debug": false,
"filter": true,
"hostname": "${hostname}",
"safeguard": {
"maxMemMByte": 5000
},
"plugin": {
"enabled": false,
"dir": "${FALCON_DIR}/plugin",
"tarball": "http://file.chegva.com/plugin.tar.gz",
"logs": "/home/work/falcon_agentd_plugins/logs"
},
"heartbeat": {
"enabled": false,
"addr": "falcon.chegva.com:8443",
"isHttpReporter": false,
"httpAddr": "http://falcon.chegva.com:8080",
"interval": 60,
"timeout": 300000
},
"transfer": {
"enabled": true,
"isGrpcBackend": false,
"addr": "transfer.falcon.chegva.com:80",
"isHttpSender": true,
"httpAddr": "http://falcon.chegva.com:6060/api/push",
"interval": 60,
"timeout": 5000,
"batch": 200
},
"http": {
"enabled": true,
"listen": ":1988"
},
"collector": {
"ifacePrefix": ["eth", "em", "vlan","p4p"]
}
}
EOF
}
# 启动falcon-agent
start_agent() {
PROCESS_NUM=`ps -ef | grep "falcon-agent" | wc -l`
TIME=`date +%Y-%m-%d\ %H:%M:%S`
#echo $PROCESS_NUM
if [ $PROCESS_NUM -eq 2 ]; then
echo $TIME"Falcon agent is runnning"
else
echo $TIME"Falcon agent is down, will start..." && nohup ${FALCON_DIR}/falcon-agent -c ${CONFIG_FILE} 2>${FALCON_DIR}/var/stderr.log &
ps -ef | grep -v grep | grep "falcon-agent"
fi
}
# 添加falcon-agent进程moniter定时任务
add_cron() {
# 将crontab定时任务加入到定时任务，agent有时候会自己停了
if grep -q "falcon_agentd" /var/spool/cron/root; then
echo "falcon moniter定时任务已经添加！"
else
echo "*/5 * * * * ${FALCON_DIR}/monitor.sh >> ${FALCON_DIR}/var/app.log" >> /var/spool/cron/root
echo "添加falcon moniter定时任务完成"
fi
}
main() {
echo "开始安装falcon-agent...."s
download_agent && add_config && start_agent && add_cron
echo "falcon-agent安装完成，请验证是否有数据显示：https://falcon.chegva.com/#/dashboard \n"
}
main相关记录:
# 注入ssh key
ansible -i tmp all -m shell -a "echo 'ssh-rsa AAAAB3...' >> /root/.ssh/authorized_keys"
# 批量修改主机名
ansible-playbook -i tmp modify_hostname.yml
# cat tmp
10.1.1.192 hostname=anzhihe ansible_ssh_pass=anzhihe
10.1.1.198 hostname=anzhihe ansible_ssh_pass=anzhihe
# cat modify_hostname.yml
---
- hosts: all
remote_user: root
tasks:
- name: set hostname
shell: hostname && cat /etc/hosts && hostname {{hostname}} && hostnamectl set-hostname {{hostname}} && hostname
# 执行falcon-agent安装脚本
ansible -i tmp all -m script -a 'install_falcon_agent.sh'
