Yum error :[Errno 14] Peer cert cannot be verified or peer cert invalid

In my case the above certificate error was because of worng time in the server . Once  I installed ntp and updated the time it started working fine.

yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
Error: Cannot retrieve repository metadata (repomd.xml) for repository: epel. Please verify its path and try again
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirror.net.cen.ct.gov
* extras: mirror.fdcservers.net
* updates: mirror.solarvps.com
base | 3.7 kB 00:00
base/primary_db | 4.4 MB 00:01
extras | 3.4 kB 00:00
extras/primary_db | 19 kB 00:00
foreman | 2.9 kB 00:00
foreman/primary_db | 77 kB 00:00
foreman-plugins | 2.9 kB 00:00
foreman-plugins/primary_db | 26 kB 00:00
http://repos.fedorapeople.org/repos/openstack/openstack-icehouse/epel-6/repodata/repomd.xml: [Errno 14] Peer cert cannot be verified or peer cert invalid
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: openstack-icehouse. Please verify its path and try again