CENTOS 7 - curl - Could not resolve host - mirrorlist.centos.org - Unknown error

# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

Временное решение - это заменить репозиторий на vault.centos.org

# sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/CentOS*.repo
# sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/CentOS*.repo
# sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/CentOS*.repo