EOS RPC API monitor Health Check

由于需要检查EOS Rpc API的健康运行情况，所以需要一个检查的脚本定期运行
监控需要发送微信消息，先参考《推荐一个简单的服务器监控，发送消息给微信的方案「Server酱」》，注册下面需要用的SCKEY
新建api_monitor.sh,内容如下

#!/bin/bash
# Update these for your own settings
declare -A APIS=( [eos-mainnet]=https://eos-mainnet.bcskill.com [get-scatter]=https://nodes.get-scatter.com )
WE_CHAT_WEBHOOK=https://sc.ftqq.com/SCKEY（去上面的参考去申请）.send
#最新区块时间`head_block_time`与本地时间存在时差，不确定具体原因，暂时比对时间为容差为24h
DELAY=60*60*24

# Do not change below here
for K in "${!APIS[@]}"
do
    # Check the endpoint
    JSON=$(curl -s ${APIS[$K]}/v1/chain/get_info)

    # Fail if curl was unsuccessful
    if [ $? -ne 0 ]; then
        curl -s -X POST --data "text=\"\`$K\` API node cannot be accessed @ ${APIS[$K]}\"&desp=EOS Monitor Error" $WE_CHAT_WEBHOOK
        continue
    fi

    # Calculate the diff
    HEAD=$(echo $JSON | jq -r .head_block_time)
    BLOCK=$(date --date=$HEAD +"%s")
    NOW=$(date +"%s")
    DIFF="$(($NOW-$BLOCK))"

    # Fail if head block is older than acceptable delay
    if [[ $DIFF -gt $DELAY ]]; then
        curl -s -X POST --data "text=\"\`$K\` API head block time @ ${APIS[$K]}/v1/chain/get_info is lagging more than $DELAY seconds: $HEAD\"&desp=EOS Monitor Error" $WE_CHAT_WEBHOOK
    fi
done

依赖

返回结果依赖jq解析，需要先安装下

sudo apt-get install jq

修改文件权限

chmod 755 api_monitor.sh

运行

每30秒检查一次

watch -n 30 ./api_monitor.sh

等出问题时，会直接发送消息到绑定的微信

参考：https://github.com/BlockMatrixNetwork/eos-bp-failover/tree/master/external-rpc-api-monitor