How can I prevent chronyc to call connect() with PF_INET6?

Solution Verified - Updated -

Issue

I want to disable IPv6 on the system, and followed the following solutions.
- https://access.redhat.com/solutions/8709
- https://access.redhat.com/solutions/2026723

But, I still see the following system call was called in chronyc sources command.

# grep INET6 /tmp/strace.log
1000  xx:xx:xx.xxxxxx socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP) = 3 <0.000032>
1000  xx:xx:xx.xxxxxx connect(3, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 ENETUNREACH (Network is unreachable) <0.000013>

How can we prevent this call?

Environment

Red Hat Enterprise Linux 7.1

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