upt CentOS repo change from mirror to vault

ch4/4.3.4/k8s-SingleMaster-18.9_9_w_auto-compl/config.sh

@@ -8,6 +8,12 @@ swapoff -a
 # sed to comment the swap partition in /etc/fstab
 sed -i.bak -r 's/(.+ swap .+)/#\1/' /etc/fstab
 
+# CentOS repo change from mirror to vault
+sed -i -e 's/mirrorlist=/#mirrorlist=/g' /etc/yum.repos.d/CentOS-*
+sed -i -e 's/mirrorlist=/#mirrorlist=/g' /etc/yum.conf
+sed -E -i -e 's/#baseurl=http:\/\/mirror.centos.org\/centos\/\$releasever\/([[:alnum:]_-]*)\/\$basearch\//baseurl=https:\/\/vault.centos.org\/7.9.2009\/\1\/\$basearch\//g' /etc/yum.repos.d/CentOS-*
+sed -E -i -e 's/#baseurl=http:\/\/mirror.centos.org\/centos\/\$releasever\/([[:alnum:]_-]*)\/\$basearch\//baseurl=https:\/\/vault.centos.org\/7.9.2009\/\1\/\$basearch\//g' /etc/yum.conf
+
 # kubernetes repo
 gg_pkg="http://mirrors.aliyun.com/kubernetes/yum" # Due to shorten addr for key
 cat <<EOF > /etc/yum.repos.d/kubernetes.repo