keepalived 中的MISC_CHECK用法

#MISC healthchecker, run a program
MISC_CHECK
{
# External system script or program
misc_path <STRING>|<QUOTED-STRING>
# Script execution timeout
misc_timeout <INT>

# If set, exit code from healthchecker is used
# to dynamically adjust the weight as follows:
#   exit status 0: svc check success, weight
#     unchanged.
#   exit status 1: svc check failed.
#   exit status 2-255: svc check success, weight
#     changed to 2 less than exit status.
#   (for example: exit status of 255 would set
#     weight to 253)
misc_dynamic

通过编写脚本,对返回的值进行判断
exit 0:健康检查正常,keepalived状态正常
exit 1:检测失败,keepalived 状态异常
exit 退出值等于其他值时,需要修改值为小于exit status的状态码
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