Hi, I setup Openshift Origin 1.5 with openvswitch network plugin.
It seemed that dns server setup was not properly within pod. services, endpoints couldn't be reached by name. Within pod, /etc/resolv.conf contains following content, root@sb-2017-redis-master-w7g44:/data# cat /etc/resolv.conf search redis.svc.cluster.local svc.cluster.local cluster.local nameserver 10.1.241.55 options ndots:5 Then I added "172.30.0.1" to /etc/resolv.conf as below, root@sb-2017-redis-master-w7g44:/data# cat /etc/resolv.conf search redis.svc.cluster.local svc.cluster.local cluster.local nameserver 10.1.241.55 options ndots:5 nameserver 172.30.0.1 Then services, endpoints could be found by dns name. So why is "nameserver 172.30.0.1" not added to /etc/resolv.conf automatically? Did I missed anything when setup cluster? [root@host-10-1-236-92 gluster]# dig redis-svc.redis.svc.cluster.local ; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7 <<>> redis-svc.redis.svc.cluster.local ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4207 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;redis-svc.redis.svc.cluster.local. IN A ;; ANSWER SECTION: redis-svc.redis.svc.cluster.local. 30 IN A 172.30.4.92 ;; Query time: 2 msec ;; SERVER: 172.30.0.1#53(172.30.0.1) ;; WHEN: Mon Aug 21 18:48:50 CST 2017 ;; MSG SIZE rcvd: 67 [root@host-10-1-236-92 gluster]# dig redis-svc.redis.endpoints.cluster.local ; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7 <<>> redis-svc.redis.endpoints.cluster.local ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19434 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;redis-svc.redis.endpoints.cluster.local. IN A ;; ANSWER SECTION: redis-svc.redis.endpoints.cluster.local. 30 IN A 10.130.0.2 ;; Query time: 5 msec ;; SERVER: 172.30.0.1#53(172.30.0.1) ;; WHEN: Mon Aug 21 18:49:05 CST 2017 ;; MSG SIZE rcvd: 73 Thanks, Jared, (韦煜） Software developer Interested in open source software, big data, Linux
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