x509: certificate signed by unknown authority 这个问题也许没有你想的那么复杂

起初是遇到了个问题

我就更新了个cdn的证书

结果golang的http库无法正常请求接口，php的file_get_contents也无法正常请求接口

报错信息

golang的http库反馈的是 x509: certificate signed by unknown authority

php的file_get_contents 反馈的是 error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed on line 1

经过多种的猜测，发现执行完这个命令后一切都恢复了正常

yum update ca-certificates -y