修改json文件

第三方库jq

https://stedolan.github.io/jq/manual/

    cat old_deploy.json \
        | jq --arg cpu_limit $cpu_limit 'setpath(["spec", "template", "spec", "containers", 0, "resources", "limits", "cpu"]; $cpu_limit)' \
        | jq --arg memory_limit $memory_limit 'setpath(["spec", "template", "spec", "containers", 0, "resources", "limits", "memory"]; $memory_limit)' \
        > new_deploy.json

读取文件文本

while read line
do
        echo "$line"
done < /tmp/nginx.yaml

修改文本文件（逐行匹配，替换）

sed -i  's/\("host":"\).*/\1192.168.0.1",/g'   rabbitmq.json

cat rabbitmq.json
{
  "rabbitmq": {
    "ssl": false,
    "host":"192.168.0.1",
    ,
    "vhost": "/sensu",
    "user": "sensu",
    "password": "sensu"
  }
}