zabbix监控ssl证书过期时间

获取证书过期时间脚本：

/etc/zabbix/scripts/check-cert-expire.sh:

#!/bin/bash
host=$
port=$
end_date=`/usr/bin/openssl s_client -servername $host -host $host -port $port -showcerts </dev/null >/dev/null |
  sed -n '/BEGIN CERTIFICATE/,/END CERT/p' |
  /usr/bin/openssl  x509 -text >/dev/null |
  sed -n 's/ *Not After : *//p'`
# openssl 检验和验证SSL证书。
# -servername $host 因一台主机存在多个证书，利用SNI特性检查
# </dev/null 定向标准输入，防止交互式程序。从/dev/null 读时，直接读出0 。
# sed -n 和p 一起使用，仅显示匹配到的部分。 //,// 区间匹配。
# openssl x509 -text 解码证书信息，包含证书的有效期。

if [ -n "$end_date" ]
then
    end_date_seconds=`date '+%s' --date "$end_date"`
    now_seconds=`date '+%s'`
    echo "($end_date_seconds-$now_seconds)/24/3600" | bc
fi

域名自动发现脚本：

#!/usr/bin/env python
#coding:utf-8

import os
import sys
import json

#这个函数主要是构造出一个特定格式的字典，用于zabbix
def ssl_cert_discovery():
    web_list=[]
    web_dict={"data":None}
    with open("/etc/zabbix/scripts/ssl_cert_list","r") as f:
        for sslcert in f:
            dict={}
            dict["{#DOMAINNAME}"]=sslcert.strip().split()[0]
            dict["{#PORT}"]=sslcert.strip().split()[1]
            web_list.append(dict)
    web_dict["data"]=web_list
    jsonStr = json.dumps(web_dict,indent=4)
    return jsonStr
if __name__ == "__main__":
    print ssl_cert_discovery()

域名列表：

/etc/zabbix/scripts/ssl_cert_list:
www.baidu.com 443
www.qq.com 443

zabbix配置：

/etc/zabbix/zabbix_agentd.conf.d/userparameter_sslcert.conf:
UserParameter=sslcert_discovery,/usr/bin/python  /etc/zabbix/scripts/sshcert_discovery.py
UserParameter=sslcert.info[*],/bin/bash /etc/zabbix/scripts/check-cert-expire.sh $1 $2

在zabbix中添加模板：

Template_ssl_cert_info.xml：

<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
    <version>3.0</version>
    <date>2019-07-25T10:31:57Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>
        <template>
            <template>Template ssl cert Information</template>
            <name>Template ssl cert Information</name>
            <description/>
            <groups>
                <group>
                    <name>Templates</name>
                </group>
            </groups>
            <applications/>
            <items/>
            <discovery_rules>
                <discovery_rule>
                    <name>ssl cert information</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>sslcert_discovery</key>
                    <delay>10800</delay>
                    <status>0</status>
                    <allowed_hosts/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <filter>
                        <evaltype>0</evaltype>
                        <formula/>
                        <conditions/>
                    </filter>
                    <lifetime>30</lifetime>
                    <description/>
                    <item_prototypes>
                        <item_prototype>
                            <name>sslinfo[{#DOMAINNAME}]</name>
                            <type>0</type>
                            <snmp_community/>
                            <multiplier>1</multiplier>
                            <snmp_oid/>
                            <key>sslcert.info[{#DOMAINNAME},{#PORT}]</key>
                            <delay>10800</delay>
                            <history>90</history>
                            <trends>365</trends>
                            <status>0</status>
                            <value_type>3</value_type>
                            <allowed_hosts/>
                            <units>天</units>
                            <delta>0</delta>
                            <snmpv3_contextname/>
                            <snmpv3_securityname/>
                            <snmpv3_securitylevel>0</snmpv3_securitylevel>
                            <snmpv3_authprotocol>0</snmpv3_authprotocol>
                            <snmpv3_authpassphrase/>
                            <snmpv3_privprotocol>0</snmpv3_privprotocol>
                            <snmpv3_privpassphrase/>
                            <formula>1</formula>
                            <delay_flex/>
                            <params/>
                            <ipmi_sensor/>
                            <data_type>0</data_type>
                            <authtype>0</authtype>
                            <username/>
                            <password/>
                            <publickey/>
                            <privatekey/>
                            <port/>
                            <description/>
                            <inventory_link>0</inventory_link>
                            <applications/>
                            <valuemap/>
                            <logtimefmt/>
                            <application_prototypes/>
                        </item_prototype>
                    </item_prototypes>
                    <trigger_prototypes>
                        <trigger_prototype>
                            <expression>{Template ssl cert Information:sslcert.info[{#DOMAINNAME},{#PORT}].last()}&lt;7</expression>
                            <name>{#DOMAINNAME} will retire after 7 days,Attention Please!</name>
                            <url/>
                            <status>0</status>
                            <priority>4</priority>
                            <description/>
                            <type>0</type>
                            <dependencies/>
                        </trigger_prototype>
                    </trigger_prototypes>
                    <graph_prototypes/>
                    <host_prototypes/>
                </discovery_rule>
            </discovery_rules>
            <macros/>
            <templates/>
            <screens/>
        </template>
    </templates>
</zabbix_export>

调整触发器时长，验证配置是否正确。