sh-4.3$ dig +search localhost ; <<>> DiG 9.10.3-P4-RedHat-9.10.3-13.P4.fc23 <<>> +search localhost ;; global options: +cmd ;; connection timed out; no servers could be reached
On 08/11/2016 08:12 PM, Clayton Coleman wrote:
Can you run dig in a container on localhost (dig +search localhost, I think) and contrast that? Is it only one tool that fails to read /etc/hosts, or all tools? On Thu, Aug 11, 2016 at 2:00 PM, Ulf Lilleengen <[email protected] <mailto:[email protected]>> wrote: My bad. This was inside the same container, but it was one I ran manually with --net=host. Here is from the one running in openshift: sh-4.3$ cat /etc/resolv.conf search enmasse.svc.cluster.local svc.cluster.local cluster.local nameserver 192.168.1.17 options ndots:5 On 08/11/2016 07:44 PM, Clayton Coleman wrote: Sorry, I meant resolve.conf inside of one of your containers On Thu, Aug 11, 2016 at 1:35 PM, Ulf Lilleengen <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> wrote: [root@strappi /]# cat /etc/resolv.conf # Generated by NetworkManager search redhat.com <http://redhat.com> <http://redhat.com> nameserver 10.38.5.26 nameserver 10.35.255.14 nameserver 192.168.1.1 # NOTE: the libc resolver may not support more than 3 nameservers. # The nameservers listed below may not be recognized. nameserver 2001:4662:afe3:0:8a1f:a1ff:fe2d:34e6 Note that I set the disable_ipv6=1, but I didn't restart openshift/docker after doing it though. On 08/11/2016 05:48 PM, Clayton Coleman wrote: Tried this with Fedora 24 and very similar config (but centos7 image) and I'm able to ping localhost. $ cat /etc/hosts # Kubernetes-managed hosts file. 127.0.0.1localhost ::1localhost ip6-localhost ip6-loopback fe00::0ip6-localnet fe00::0ip6-mcastprefix fe00::1ip6-allnodes fe00::2ip6-allrouters 172.17.0.2centoscentos7-debug I have net.ipv6.conf.all.disable_ipv6 = 1 set - should be possible. Can you provide your /etc/resolv.conf from inside that image? On Thu, Aug 11, 2016 at 11:29 AM, Ulf Lilleengen <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>>> wrote: Host: OS: Fedora 24 Docker: 1.10.3 glibc-2.23.1-8 Docker image: Name: gordons/qdrouterd:v10 (based on Fedora 23) Glibc:glibc-2.22-11 Nothing special in the images other than that. The issue appeared without any significant change other than running the latest openshift/origin image. On 08/11/2016 04:58 PM, Clayton Coleman wrote: That is very strange. Anything special about the container (what OS, libraries, glibc version, musl)? What version of Docker was running? On Wed, Aug 10, 2016 at 3:45 AM, Ulf Lilleengen <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>>>> wrote: Hi, We were debugging an issue yesterday where 'localhost' could not be resolved inside a container in openshift origin v1.3.0-alpha.3. I'm not sure if this is openshift or kubernetes-related, but thought I'd ask here first. We have two containers running on a pod, and one container is connecting to the other using 'localhost'. This has worked fine for several months, but stopped working yesterday. We resolved the issue by using 127.0.0.1. We were also able to use the pod hostname as well. I'm thinking this might be related to IPv6, given that /etc/hosts seemed to contain IPv6 records for localhost, and the other container may be listening on IPv4 only. I tried disabling it with sysctl net.ipv6.conf.all.disable_ipv6=1 to verify, but I still saw the same issue. sh-4.3$ cat /etc/hosts # Kubernetes-managed hosts file. 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet fe00::0 ip6-mcastprefix fe00::1 ip6-allnodes fe00::2 ip6-allrouters 172.17.0.6 controller-queue1-tnvav -- Ulf Lilleengen _______________________________________________ users mailing list [email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> <mailto:[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>>> http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users>> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users>>> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users>> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users> <http://lists.openshift.redhat.com/openshiftmm/listinfo/users <http://lists.openshift.redhat.com/openshiftmm/listinfo/users>>>> -- Ulf -- Ulf -- Ulf
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