Hi Guys
I found  homestead docker image can't connect kubernetes skydns for query 
cassandra service

/etc/init.d/homestead start
/etc/init.d/homestead: 84: ulimit: error setting limit (Invalid argument)
--localhost=172.17.1.6 --home-domain=example.com 
--diameter-conf=/var/lib/homestead/homestead.conf --dns-server=169.169.0.100 
--http=172.17.1.6 --http-threads=200 --cassandra=cassandra --dest-host=0.0.0.0 
--hss-peer= --max-peers=2 --server-name="sip:scscf.sprout:5054;transport=TCP" 
--impu-cache-ttl=0 --hss-reregistration-time=1800 --reg-max-expires=300 
--sprout-http-name=sprout:9888 --scheme-unknown="Unknown" --scheme-digest="SIP 
Digest" --scheme-akav1="Digest-AKAv1-MD5" --scheme-akav2="Digest-AKAv2-SHA-256" 
--access-log=/var/log/homestead --log-file=/var/log/homestead --log-level=2 
--sas=0.0.0.0,homestead@172.17.1.6


18-10-2016 00:11:17.918 UTC Status dnscachedresolver.cpp:154:     169.169.0.100
18-10-2016 00:11:17.921 UTC Error dnscachedresolver.cpp:607: Failed to retrieve 
record for cassandra: Could not contact DNS servers
18-10-2016 00:11:55.076 UTC Status dnscachedresolver.cpp:144: Creating Cached 
Resolver using servers:
18-10-2016 00:11:55.076 UTC Status dnscachedresolver.cpp:154:     169.169.0.100
18-10-2016 00:11:55.081 UTC Error dnscachedresolver.cpp:607: Failed to retrieve 
record for cassandra: Could not contact DNS servers

But DNS server (kuberntes skydns ) can be queried in other pods

[root@hpeu-docker-k8s ~]# kubectl create -f k8s_practices/03_dns/busybox.yaml
pod "busybox" created
[root@hpeu-docker-k8s ~]# kubectl exec -it busybox sh
/ # nslookup cassandra
Server:    169.169.0.100
Address 1: 169.169.0.100

Name:      cassandra
Address 1: 169.169.193.170



Best Regards,
Wu, Zhi-Hui

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