安裝 redis服務

通過自定義監控模闆對memcache進行監控

為了測試效果，在主動模式下，因為主動模式擷取資料比較快一些

環境：在這裡複用Mysql-slave的主機

zabbix server	zabbix agent
172.20.32.101：Zabbix-server	172.20.32.105：Mysql-slave

安裝 redis

[email protected]:~# apt install redis -y

[email protected]:~# vim /etc/redis/redis.conf 
[email protected]:~# grep ^[a-Z] /etc/redis/redis.conf
bind 0.0.0.0  #修改監聽位址為0.0.0.0
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize yes
supervised no
pidfile /var/run/redis/redis-server.pid
loglevel notice
logfile /var/log/redis/redis-server.log
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /var/lib/redis
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
slave-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble no
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes

[email protected]:~# systemctl restart redis-server
[email protected]:~# systemctl enable redis-server
Synchronizing state of redis-server.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable redis-server

[email protected]:~# ss -ntl |grep 6379
LISTEN  0        511                    0.0.0.0:6379             0.0.0.0:*      


[email protected]:~# redis-cli 
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> set key1 vaule1
OK
127.0.0.1:6379> keys *
1) "key1"
127.0.0.1:6379>

編寫監控腳本

腳本編寫思路

[email protected]:~# echo -en "INFO \r\n" | ncat 127.0.0.1 6379
$2759
# Server
redis_version:4.0.9
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:9435c3c2879311f3
redis_mode:standalone
os:Linux 4.15.0-29-generic x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:7.4.0
process_id:59969
run_id:d43a1454bccb9c1d72cd634fa5a66a3d2a832c26
······
#擷取某一條資訊
[email protected]:~# echo -en "INFO \r\n" | ncat 127.0.0.1 6379 | grep role:
role:master

[email protected]:~# echo -en "INFO \r\n" | ncat 127.0.0.1 6379 | grep role: | awk -F: '{print $2}'
master

腳本編寫

在機器172.20.32.105上面編寫腳本

一般腳本放在/etc/zabbix/zabbix_agentd.d/這個檔案目錄下

方法一： redis_monitor.sh

[email protected]:/etc/zabbix/zabbix_agentd.d# vim redis_monitor.sh 
#!/bin/bash
# 
# Edited on 20200501 by likai.tech
#
redis_status(){
        R_PORT=$1
        R_COMMAND=$2
        (echo -en "INFO \r\n";sleep 1;) | ncat 127.0.0.1 "$R_PORT" > /tmp/redis_"$R_PORT".tmp
        REDIS_STAT_VALUE=$(grep ""$R_COMMAND":" /tmp/redis_"$R_PORT".tmp | cut -d':' -f2)
        echo $REDIS_STAT_VALUE 
}

help(){
        echo "${0} + redis_status + PORT + COMMAND" 
}

main(){
        case $1 in
                redis_status)
                        redis_status $2 $3
                                ;;
                *)
                        help
                                ;;
        esac
}

main $1 $2 $3

[email protected]:/etc/zabbix/zabbix_agentd.d# chmod a+x redis_monitor.sh
[email protected]:/etc/zabbix/zabbix_agentd.d# bash redis_monitor.sh redis_status 6379 connected_clients
1
[email protected]:/etc/zabbix/zabbix_agentd.d# bash redis_monitor.sh redis_status 6379 used_memory
840352

方法二： redis_monitor1.sh

[email protected]:/etc/zabbix/zabbix_agentd.d# vim redis_monitor1.sh 
#!/bin/bash
# 
# Edited on 20200501 by likai.tech
#

get_redis_status(){
echo -en "INFO \r\n" | ncat 127.0.0.1 $1 | grep -w "$2" | awk -F: '{print $2}'
}

main(){
        # install ncat
    cat /etc/issue | grep -iq "ubuntu"
    [[ $? -ne 0 ]] && yum install nmap-ncat -y &> /dev/null || apt install nmap-ncat -y &> /dev/null

        # prompt usage
    if [[ $# -eq 0 ]]; then
        echo "`basename $0` redis_status <PORT> <STATUS>"
    fi

        # do the f* thing
    if [[ $1 = "redis_status" ]]; then
        get_redis_status $2 $3
    fi
}

main $1 $2 $3

[email protected]:/etc/zabbix/zabbix_agentd.d# chmod a+x redis_monitor1.sh
[email protected]:/etc/zabbix/zabbix_agentd.d# bash redis_monitor1.sh redis_status 6379 connected_clients
1
[email protected]:/etc/zabbix/zabbix_agentd.d# bash redis_monitor1.sh redis_status 6379 used_memory
840352

增加監控項

這裡以方法一的腳本做自定義監控項目

在 agent 配置檔案增加監控項

[email protected]:/etc/zabbix/zabbix_agentd.d# vim /etc/zabbix/zabbix_agentd.conf
### Option: UserParameter
#       User-defined parameter to monitor. There can be several user-defined parameters.
#       Format: UserParameter=<key>,<shell command>
#       See 'zabbix_agentd' directory for examples.
#
# Mandatory: no
# Default:
# UserParameter=
#添加自定義監控項
UserParameter=redis_status[*],bin/bash /etc/zabbix/zabbix_agentd.d/redis_monitor.sh "$1" "$2" "$3"

[email protected]:/etc/zabbix/zabbix_agentd.d# systemctl restart zabbix-agent.service