Docker not running on CentOS 7 rt Kernel

General
1

Hi,

First of all I would like to inform you guys that I am a newbie in docker and linux so please forgive my stupid questions or remarks if any.

I have successfully installed docker on CentOS 7 using the described in here CentOS | Docker Docs.
Please note that I am using RT kernel 3.10.104-rt116.

But when I try to run the hello-world application in docker, I get the following error.
[root@Imran ~]# sudo docker run --rm hello-world
Unable to find image ‘hello-world:latest’ locally
latest: Pulling from library/hello-world
78445dd45222: Extracting 971 B/971 B
docker: failed to register layer: devmapper: Error mounting ‘/dev/mapper/docker-253:0-140399561-7005371d5ef5c995d9af5290e36a2507372124823fdce8c673aa569d1fc5c2e9’ on ‘/var/lib/docker/devicemapper/mnt/7005371d5ef5c995d9af5290e36a2507372124823fdce8c673aa569d1fc5c2e9’: invalid argument.
See ‘docker run --help’.

my docker version is the latest one:
docker -v
Docker version 1.13.0-rc7, build 48a9e53

Does anyone have any idea so as to why is this error occurring?

As a side help I came across the check-config.sh script from docker webpage and when I run it I see the following output.

Generally Necessary:

  • cgroup hierarchy: properly mounted [/sys/fs/cgroup]
  • CONFIG_NAMESPACES: enabled
  • CONFIG_NET_NS: enabled
  • CONFIG_PID_NS: enabled
  • CONFIG_IPC_NS: enabled
  • CONFIG_UTS_NS: enabled
  • CONFIG_CGROUPS: enabled
  • CONFIG_CGROUP_CPUACCT: enabled
  • CONFIG_CGROUP_DEVICE: enabled
  • CONFIG_CGROUP_FREEZER: enabled
  • CONFIG_CGROUP_SCHED: enabled
  • CONFIG_CPUSETS: enabled
  • CONFIG_MEMCG: enabled
  • CONFIG_KEYS: enabled
  • CONFIG_VETH: enabled (as module)
  • CONFIG_BRIDGE: enabled (as module)
  • CONFIG_BRIDGE_NETFILTER: enabled
  • CONFIG_NF_NAT_IPV4: enabled (as module)
  • CONFIG_IP_NF_FILTER: enabled (as module)
  • CONFIG_IP_NF_TARGET_MASQUERADE: enabled (as module)
  • CONFIG_NETFILTER_XT_MATCH_ADDRTYPE: enabled (as module)
  • CONFIG_NETFILTER_XT_MATCH_CONNTRACK: enabled (as module)
  • CONFIG_NETFILTER_XT_MATCH_IPVS: enabled (as module)
  • CONFIG_IP_NF_NAT: missing
  • CONFIG_NF_NAT: enabled (as module)
  • CONFIG_NF_NAT_NEEDED: enabled
  • CONFIG_POSIX_MQUEUE: enabled
  • CONFIG_DEVPTS_MULTIPLE_INSTANCES: enabled

Optional Features:

  • CONFIG_USER_NS: missing
    (RHEL7/CentOS7: User namespaces disabled; add ‘user_namespace.enable=1’ to boot command line)
  • CONFIG_SECCOMP: enabled
  • CONFIG_CGROUP_PIDS: missing
  • CONFIG_MEMCG_SWAP: enabled
  • CONFIG_MEMCG_SWAP_ENABLED: enabled
  • CONFIG_MEMCG_KMEM: enabled
  • CONFIG_RESOURCE_COUNTERS: enabled
  • CONFIG_BLK_CGROUP: enabled
  • CONFIG_BLK_DEV_THROTTLING: enabled
  • CONFIG_IOSCHED_CFQ: enabled
  • CONFIG_CFQ_GROUP_IOSCHED: enabled
  • CONFIG_CGROUP_PERF: enabled
  • CONFIG_CGROUP_HUGETLB: enabled
  • CONFIG_NET_CLS_CGROUP: enabled
  • CONFIG_NETPRIO_CGROUP: enabled (as module)
  • CONFIG_CFS_BANDWIDTH: enabled
  • CONFIG_FAIR_GROUP_SCHED: enabled
  • CONFIG_RT_GROUP_SCHED: missing
  • CONFIG_IP_VS: enabled (as module)
  • CONFIG_IP_VS_NFCT: enabled
  • CONFIG_IP_VS_RR: enabled (as module)
  • CONFIG_EXT3_FS: missing
  • CONFIG_EXT3_FS_XATTR: missing
  • CONFIG_EXT3_FS_POSIX_ACL: missing
  • CONFIG_EXT3_FS_SECURITY: missing
    (enable these ext3 configs if you are using ext3 as backing filesystem)
  • CONFIG_EXT4_FS: enabled (as module)
  • CONFIG_EXT4_FS_POSIX_ACL: enabled
  • CONFIG_EXT4_FS_SECURITY: enabled
  • Network Drivers:
    • “overlay”:
      • CONFIG_VXLAN: enabled (as module)
        Optional (for encrypted networks):
        • CONFIG_CRYPTO: enabled
        • CONFIG_CRYPTO_AEAD: enabled
        • CONFIG_CRYPTO_GCM: enabled (as module)
        • CONFIG_CRYPTO_SEQIV: enabled
        • CONFIG_CRYPTO_GHASH: enabled (as module)
        • CONFIG_XFRM: enabled
        • CONFIG_XFRM_USER: enabled
        • CONFIG_XFRM_ALGO: enabled
        • CONFIG_INET_ESP: enabled (as module)
        • CONFIG_INET_XFRM_MODE_TRANSPORT: enabled (as module)
    • “ipvlan”:
      • CONFIG_IPVLAN: missing
    • “macvlan”:
      • CONFIG_MACVLAN: enabled (as module)
      • CONFIG_DUMMY: enabled (as module)
    • “ftp,tftp client in container”:
      • CONFIG_NF_NAT_FTP: enabled (as module)
      • CONFIG_NF_CONNTRACK_FTP: enabled (as module)
      • CONFIG_NF_NAT_TFTP: enabled (as module)
      • CONFIG_NF_CONNTRACK_TFTP: enabled (as module)
  • Storage Drivers:
    • “aufs”:
      • CONFIG_AUFS_FS: missing
    • “btrfs”:
      • CONFIG_BTRFS_FS: enabled (as module)
      • CONFIG_BTRFS_FS_POSIX_ACL: enabled
    • “devicemapper”:
      • CONFIG_BLK_DEV_DM: enabled (as module)
      • CONFIG_DM_THIN_PROVISIONING: enabled (as module)
    • “overlay”:
      • CONFIG_OVERLAY_FS: missing
    • “zfs”:
      • /dev/zfs: missing
      • zfs command: missing
      • zpool command: missing

Limits:

  • /proc/sys/kernel/keys/root_maxkeys: 1000000

I see that in necessary config I am missing “CONFIG_IP_NF_NAT” so I have tried to find this option using make menuconfig but I could not find it. I tried to search this issue in open forums but I could not find a solution which works for me.

I shall be really grateful for your help.

Thanks

Regards
Imran