Sunday, March 16, 2014

Setting up Neutron-dhcp-agent & Dnsmasq on Two Node Neutron GRE+OVS F20 Cluster to launch VMs with MTU 1454 automatically

  When you first time boot cloud instance (RDO Havana) via `nova boot ..` or via Dashboard associated with ssh keypair , the default MTU value for eth0 of instance has been built would be 1500. The last one  in case of GRE tunnelling makes useless attempt to connect to instance via ssh (  $ ssh -l fedora -i key2.pem Instance-IP ). What actually forces you to write customization script to log into instance  via VNC console with account like "fedora","ubuntu","cloud-user" and set MTU manually to 1454 inside instance.    However ,  it exists known approach to tune dhcp_agent.ini and dnsmasq.conf to assign  internal IP for instance with MTU 1454 at the first boot up updating neutron-dhcp-agent.ini & dnsmasq.conf files as follows [ 1 ] :-

[root@dfw02 neutron(keystone_admin)]$ cat dhcp_agent.ini | grep -v ^# | grep -v ^$
[DEFAULT]
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
handle_internal_only_routers = TRUE
external_network_bridge = br-ex
ovs_use_veth = True
use_namespaces = True
dnsmasq_config_file = /etc/neutron/dnsmasq.conf

[root@dfw02 neutron(keystone_admin)]$ cat  dnsmasq.conf
log-facility = /var/log/neutron/dnsmasq.log
log-dhcp
dhcp-option=26,1454

Then restart dnsmasq and neutron-dhcp-agent service.

#  ps -ef | grep dnsmasq

nobody    1953     1  0 09:28 ?        00:00:00 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf

nobody    5192     1  0 09:35 ?        00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-343b0090-24 --except-interface=lo --pid-file=/var/lib/neutron/dhcp/426bb226-0ab9-440d-ba14-05634a17fb2b/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/426bb226-0ab9-440d-ba14-05634a17fb2b/host --dhcp-optsfile=/var/lib/neutron/dhcp/426bb226-0ab9-440d-ba14-05634a17fb2b/opts --leasefile-ro --dhcp-range=set:tag0,40.0.0.0,static,120s --dhcp-lease-max=256 --conf-file= --domain=openstacklocal

nobody    5197     1  0 09:35 ?        00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-40dd712c-e4 --except-interface=lo --pid-file=/var/lib/neutron/dhcp/1eea88bb-4952-4aa4-9148-18b61c22d5b7/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/1eea88bb-4952-4aa4-9148-18b61c22d5b7/host --dhcp-optsfile=/var/lib/neutron/dhcp/1eea88bb-4952-4aa4-9148-18b61c22d5b7/opts --leasefile-ro --dhcp-range=set:tag0,10.0.0.0,static,120s --dhcp-lease-max=256 --conf-file= --domain=openstacklocal

# killall dnsmasq

Restart services :-

# /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf

# [root@dfw02 neutron(keystone_admin)]$ systemctl restart neutron-dhcp-agent.service

[root@dfw02 neutron(keystone_admin)]$ systemctl status neutron-dhcp-agent.service

neutron-dhcp-agent.service - OpenStack Quantum DHCP Agent
   Loaded: loaded (/usr/lib/systemd/system/neutron-dhcp-agent.service; enabled)
   Active: active (running) since Sun 2014-03-16 13:03:47 MSK; 9s ago
 Main PID: 20767 (neutron-dhcp-ag)
   CGroup: /system.slice/neutron-dhcp-agent.service
           ├─20767 /usr/bin/python /usr/bin/neutron-dhcp-agent --config-file /usr/share/neutron/neutron-dist.con...
           ├─20814 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-343b0090-24 --...
           └─20816 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-40dd712c-e4 --...

Mar 16 13:03:48 dfw02.localdomain dnsmasq[20816]: started, version 2.68 cachesize 150
Mar 16 13:03:48 dfw02.localdomain dnsmasq[20816]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHC...auth
Mar 16 13:03:48 dfw02.localdomain dnsmasq[20816]: warning: no upstream servers configured
Mar 16 13:03:48 dfw02.localdomain dnsmasq-dhcp[20816]: DHCP, static leases only on 10.0.0.0, lease time 2m
Mar 16 13:03:48 dfw02.localdomain dnsmasq-dhcp[20816]: DHCP, sockets bound exclusively to interface ns-40dd712c-e4
Mar 16 13:03:48 dfw02.localdomain dnsmasq[20816]: cleared cache
Mar 16 13:03:48 dfw02.localdomain dnsmasq-dhcp[20816]: read /var/lib/neutron/dhcp/1eea88bb-4952-4aa4-9148-18b...ost
Mar 16 13:03:48 dfw02.localdomain dnsmasq-dhcp[20816]: read /var/lib/neutron/dhcp/1eea88bb-4952-4aa4-9148-18b...pts
Mar 16 13:03:58 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPREQUEST(ns-343b0090-24) 40.0.0.6 fa:16:3e:d7:33:35
Mar 16 13:03:58 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPNAK(ns-343b0090-24) 40.0.0.6 fa:16:3e:d7:33:35 lea...und
Mar 16 13:04:02 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPDISCOVER(ns-343b0090-24) fa:16:3e:d7:33:35
Mar 16 13:04:02 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPOFFER(ns-343b0090-24) 40.0.0.6 fa:16:3e:d7:33:35
Mar 16 13:04:02 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPREQUEST(ns-343b0090-24) 40.0.0.6 fa:16:3e:d7:33:35
Mar 16 13:04:02 dfw02.localdomain dnsmasq-dhcp[20814]: DHCPACK(ns-343b0090-24) 40.0.0.6 fa:16:3e:d7:33:35 hos...0-6
Hint: Some lines were ellipsized, use -l to show in full.

Creating instance via dashboard manage as usually ( just  submit ssh key-pair when launching instance)

It will now result :-

$ ssh -l fedora -i key2.pem 192.168.1.106
The authenticity of host '192.168.1.106 (192.168.1.106)' can't be established.
RSA key fingerprint is 68:1a:79:33:c3:f8:2f:61:6a:a3:e1:40:9f:1c:76:33.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.106' (RSA) to the list of known hosts.

[fedora@vf20rs001 ~]$ ifconfig
eth0: flags=4163  mtu 1454
        inet 40.0.0.5  netmask 255.255.255.0  broadcast 40.0.0.255
        inet6 fe80::f816:3eff:feb9:83e9  prefixlen 64  scopeid 0x20
        ether fa:16:3e:b9:83:e9  txqueuelen 1000  (Ethernet)
        RX packets 252  bytes 30901 (30.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 230  bytes 28014 (27.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 0  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

and at the same time

# tail -f /var/log/neutron/dnsmasq.log will report

Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 next server: 40.0.0.3
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  1 option: 53 message-type  5
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option: 51 lease-time  2m
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option: 58 T1  56s
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option: 59 T2  1m41s
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size: 13 option: 12 hostname  host-40-0-0-7
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option:  3 router  40.0.0.1
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 14:35:42 dnsmasq-dhcp[26111]: 1830014980 sent size:  2 option: 26 mtu  1454


 

  

  



[boris@dfw02 Downloads]$ ssh -l ubuntu  -i key2.pem 192.168.1.109
The authenticity of host '192.168.1.109 (192.168.1.109)' can't be established.
ECDSA key fingerprint is 9f:c6:eb:23:ee:87:6b:47:b1:5f:f0:e6:e8:1c:80:45.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.109' (ECDSA) to the list of known hosts.

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

ubuntu@ubunturs001:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr fa:16:3e:97:b1:6a 
          inet addr:40.0.0.2  Bcast:40.0.0.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe97:b16a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1454  Metric:1
          RX packets:337 errors:0 dropped:0 overruns:0 frame:0
          TX packets:272 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:48072 (48.0 KB)  TX bytes:31092 (31.0 KB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)




Three active instances running simultaneously :-

[root@dfw02 ~(keystone_boris)]$ nova list | grep ACTIVE

| 878cb009-8afa-4fb2-ab81-b59d7b94a040  |  UbuntuRS001 | ACTIVE    | None       | Running     | int1=40.0.0.2, 192.168.1.109 |

| 47bae1d0-1be7-4b84-8392-b36270410934 |  VF20RS001   | ACTIVE    | None       | Running     | int1=40.0.0.5, 192.168.1.106  |

| 6e88e18c-c2f9-48c4-b19c-b757b104a194  |  VF20RS003   | ACTIVE    | None       | Running     | int1=40.0.0.4, 192.168.1.107 |

Log file /var/log/neutron/dnsmasq.log (renewing lease in loop all the time) :-

   Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  1 option: 53 message-type  5
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 51 lease-time  2m
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 58 T1  56s
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 59 T2  1m41s
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size: 13 option: 12 hostname  host-40-0-0-4
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  3 router  40.0.0.1
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 23:13:05 dnsmasq-dhcp[26111]: 933653313 sent size:  2 option: 26 mtu  1454
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 available DHCP subnet: 40.0.0.0/255.255.255.0
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 client provides name: ubunturs001
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 DHCPREQUEST(ns-343b0090-24) 40.0.0.2 fa:16:3e:97:b1:6a
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 tags: tag0, known, ns-343b0090-24
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 DHCPACK(ns-343b0090-24) 40.0.0.2 fa:16:3e:97:b1:6a host-40-0-0-2
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 requested options: 1:netmask, 28:broadcast, 2:time-offset, 3:router,
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 requested options: 15:domain-name, 6:dns-server, 119:domain-search,
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 requested options: 12:hostname, 44:netbios-ns, 47:netbios-scope,
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 requested options: 26:mtu, 121:classless-static-route, 42:ntp-server
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 next server: 40.0.0.3
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  1 option: 53 message-type  5
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option: 51 lease-time  2m
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option: 58 T1  55s
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option: 59 T2  1m40s
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size: 13 option: 12 hostname  host-40-0-0-2
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option:  3 router  40.0.0.1
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 23:13:25 dnsmasq-dhcp[26111]: 1796100447 sent size:  2 option: 26 mtu  1454
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 available DHCP subnet: 40.0.0.0/255.255.255.0
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 client provides name: vf20rs001
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 DHCPREQUEST(ns-343b0090-24) 40.0.0.5 fa:16:3e:b9:83:e9
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 tags: tag0, known, ns-343b0090-24
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 DHCPACK(ns-343b0090-24) 40.0.0.5 fa:16:3e:b9:83:e9 host-40-0-0-5
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 requested options: 26:mtu, 119:domain-search, 3:router
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 next server: 40.0.0.3
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  1 option: 53 message-type  5
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 51 lease-time  2m
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 58 T1  55s
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 59 T2  1m40s
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size: 13 option: 12 hostname  host-40-0-0-5
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  3 router  40.0.0.1
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 23:13:36 dnsmasq-dhcp[26111]: 2212500329 sent size:  2 option: 26 mtu  1454
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 available DHCP subnet: 40.0.0.0/255.255.255.0
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 client provides name: vf20rs003
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 DHCPREQUEST(ns-343b0090-24) 40.0.0.4 fa:16:3e:a4:21:bb
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 tags: tag0, known, ns-343b0090-24
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 DHCPACK(ns-343b0090-24) 40.0.0.4 fa:16:3e:a4:21:bb host-40-0-0-4
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 requested options: 26:mtu, 119:domain-search, 3:router
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 next server: 40.0.0.3
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  1 option: 53 message-type  5
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 51 lease-time  2m
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 58 T1  53s
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 59 T2  1m38s
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size: 13 option: 12 hostname  host-40-0-0-4
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  3 router  40.0.0.1
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 23:13:58 dnsmasq-dhcp[26111]: 933653313 sent size:  2 option: 26 mtu  1454
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 available DHCP subnet: 40.0.0.0/255.255.255.0
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 client provides name: vf20rs001
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 DHCPREQUEST(ns-343b0090-24) 40.0.0.5 fa:16:3e:b9:83:e9
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 tags: tag0, known, ns-343b0090-24
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 DHCPACK(ns-343b0090-24) 40.0.0.5 fa:16:3e:b9:83:e9 host-40-0-0-5
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 requested options: 26:mtu, 119:domain-search, 3:router
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 next server: 40.0.0.3
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  1 option: 53 message-type  5
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 54 server-identifier  40.0.0.3
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 51 lease-time  2m
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 58 T1  53s
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 59 T2  1m38s
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  1 netmask  255.255.255.0
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option: 28 broadcast  40.0.0.255
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size: 14 option: 15 domain-name  openstacklocal
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size: 13 option: 12 hostname  host-40-0-0-5
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  3 router  40.0.0.1
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  4 option:  6 dns-server  83.221.202.254
Mar 16 23:14:31 dnsmasq-dhcp[26111]: 2212500329 sent size:  2 option: 26 mtu  1454
Mar 16 23:14:41 dnsmasq-dhcp[26111]: 933653313 available DHCP subnet: 40.0.0.0/255.255.255.0


  



 

   [root@dallas2 ~]# ps -ef | grep nova
nova      1702     1  0 10:01 ?        00:03:50 /usr/bin/python /usr/bin/nova-compute --logfile /var/log/nova/compute.log
root      3531     1  0 10:06 ?        00:01:39 /usr/sbin/glusterfs --volfile-id=cinder-volumes012 --volfile-server=192.168.1.130 /var/lib/nova/mnt/1c9688348ab38662e3ac8fb121077d34
qemu     12054     1  7 18:20 ?        00:05:32 /usr/bin/qemu-system-x86_64 -name instance-0000007f -S -machine pc-i440fx-1.6,accel=tcg,usb=off -cpu Penryn,+osxsave,+xsave,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 773e454d-675a-4f93-98db-12a1a2812e58 -smbios type=1,manufacturer=Fedora Project,product=OpenStack Nova,version=2013.2.2-1.fc20,serial=6050001e-8c00-00ac-818a-90e6ba2d11eb,uuid=773e454d-675a-4f93-98db-12a1a2812e58 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000007f.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/nova/mnt/1c9688348ab38662e3ac8fb121077d34/volume-8d696bc5-4b12-4d44-92bb-28a00a3700fe,if=none,id=drive-virtio-disk0,format=raw,serial=8d696bc5-4b12-4d44-92bb-28a00a3700fe,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=26,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:8a:cd:db,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/var/lib/nova/instances/773e454d-675a-4f93-98db-12a1a2812e58/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -device usb-tablet,id=input0 -vnc 127.0.0.1:1 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -incoming fd:23 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
qemu     27517     1 45 16:57 ?        01:11:56 /usr/bin/qemu-system-x86_64 -name instance-00000080 -S -machine pc-i440fx-1.6,accel=tcg,usb=off -cpu Penryn,+osxsave,+xsave,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 9c5333f1-b5eb-4de7-90f8-6cbd1c72199d -smbios type=1,manufacturer=Fedora Project,product=OpenStack Nova,version=2013.2.2-1.fc20,serial=6050001e-8c00-00ac-818a-90e6ba2d11eb,uuid=9c5333f1-b5eb-4de7-90f8-6cbd1c72199d -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000080.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/nova/mnt/1c9688348ab38662e3ac8fb121077d34/volume-6cbf9ac4-0ebd-4f30-9c4d-2354343975c0,if=none,id=drive-virtio-disk0,format=raw,serial=6cbf9ac4-0ebd-4f30-9c4d-2354343975c0,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=24,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:65:d7:64,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/var/lib/nova/instances/9c5333f1-b5eb-4de7-90f8-6cbd1c72199d/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
root     28361 28057  0 19:34 pts/3    00:00:00 grep --color=auto nova
[root@dallas2 ~]# cd /FDR/Replicate
[root@dallas2 Replicate]# ls -la
total 8712708
drwxr-xr-x.  3  165  165       4096 Mar 21 16:56 .
drwxr-xr-x.  3 root root       4096 Mar  6 00:50 ..
drw-------. 39 root root       4096 Mar 21 16:54 .glusterfs
-rw-rw-rw-.  2 root root 5368709120 Mar 17 21:58 volume-4b807fe8-dcd2-46eb-b7dd-6ab10641c32a
-rw-rw-rw-.  2 qemu qemu 5368709120 Mar 21 19:44 volume-6cbf9ac4-0ebd-4f30-9c4d-2354343975c0
-rw-rw-rw-.  2 qemu qemu 5368709120 Mar 21 19:44 volume-8d696bc5-4b12-4d44-92bb-28a00a3700fe
-rw-rw-rw-.  2 root root 5368709120 Mar 21 14:10 volume-abc0f5b8-5144-42b7-b49f-a42a20ddd88f
-rw-rw-rw-.  2 root root 5368709120 Mar 20 23:41 volume-ec9670b8-fa64-46e9-9695-641f51bf1421


  

SSH connect to newly built Ubuntu 14.04 instance :-

[boris@dallas1 Downloads]$ ssh -l ubuntu -i key2.pem 192.168.1.106
The authenticity of host '192.168.1.106 (192.168.1.106)' can't be established.
ECDSA key fingerprint is cf:6b:20:a9:6b:30:9b:30:c4:a0:13:7e:82:98:fc:3d.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.106' (ECDSA) to the list of known hosts.
Welcome to Ubuntu Trusty Tahr (development branch) (GNU/Linux 3.13.0-19-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

  System information as of Mon Mar 24 06:34:23 UTC 2014

  System load:  3.1               Processes:           55
  Usage of /:   55.1% of 1.32GB   Users logged in:     0
  Memory usage: 3%                IP address for eth0: 10.0.0.4
  Swap usage:   0%

  Graph this data and manage this system at:
    https://landscape.canonical.com/

  Get cloud support with Ubuntu Advantage Cloud Guest:
    http://www.ubuntu.com/business/services/cloud

0 packages can be updated.
0 updates are security updates.



The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

ubuntu@ubuntuts024:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr fa:16:3e:14:69:59 
          inet addr:10.0.0.4  Bcast:10.0.0.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe14:6959/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1454  Metric:1
          RX packets:339 errors:0 dropped:0 overruns:0 frame:0
          TX packets:342 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:48048 (48.0 KB)  TX bytes:39526 (39.5 KB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

ubuntu@ubuntuts024:~$ sudo su -
sudo: unable to resolve host ubuntuts024

root@ubuntuts024:~# vi /etc/hosts

root@ubuntuts024:~# apt-get update
Ign http://security.ubuntu.com trusty-security InRelease
Hit http://security.ubuntu.com trusty-security Release.gpg
Hit http://security.ubuntu.com trusty-security Release
Ign http://nova.clouds.archive.ubuntu.com trusty InRelease       
Ign http://nova.clouds.archive.ubuntu.com trusty-updates InRelease
Get:1 http://nova.clouds.archive.ubuntu.com trusty Release.gpg [933 B]
Hit http://nova.clouds.archive.ubuntu.com trusty-updates Release.gpg
Get:2 http://nova.clouds.archive.ubuntu.com trusty Release [58.5 kB]
Get:3 http://security.ubuntu.com trusty-security/main Sources [14 B]
Get:4 http://security.ubuntu.com trusty-security/universe Sources [14 B]                      
Hit http://nova.clouds.archive.ubuntu.com trusty-updates Release                                
Hit http://security.ubuntu.com trusty-security/main amd64 Packages                              
Hit http://security.ubuntu.com trusty-security/universe amd64 Packages
Get:5 http://nova.clouds.archive.ubuntu.com trusty/main Sources [1,074 kB]
Hit http://security.ubuntu.com trusty-security/main Translation-en        
Hit http://security.ubuntu.com trusty-security/universe Translation-en    
Ign http://security.ubuntu.com trusty-security/main Translation-en_US
Ign http://security.ubuntu.com trusty-security/universe Translation-en_US
Get:6 http://nova.clouds.archive.ubuntu.com trusty/universe Sources [6,403 kB]
Get:7 http://nova.clouds.archive.ubuntu.com trusty/main amd64 Packages [1,362 kB]                                
Get:8 http://nova.clouds.archive.ubuntu.com trusty/universe amd64 Packages [5,867 kB]                            
Hit http://nova.clouds.archive.ubuntu.com trusty/main Translation-en                                             
Get:9 http://nova.clouds.archive.ubuntu.com trusty/universe Translation-en [4,048 kB]                            
Get:10 http://nova.clouds.archive.ubuntu.com trusty-updates/main Sources [14 B]                                  
Get:11 http://nova.clouds.archive.ubuntu.com trusty-updates/universe Sources [14 B]                              
Hit http://nova.clouds.archive.ubuntu.com trusty-updates/main amd64 Packages                                     
Hit http://nova.clouds.archive.ubuntu.com trusty-updates/universe amd64 Packages                                 
Hit http://nova.clouds.archive.ubuntu.com trusty-updates/main Translation-en                                     
Hit http://nova.clouds.archive.ubuntu.com trusty-updates/universe Translation-en                                 
Ign http://nova.clouds.archive.ubuntu.com trusty/main Translation-en_US                                          
Ign http://nova.clouds.archive.ubuntu.com trusty/universe Translation-en_US                                      
Ign http://nova.clouds.archive.ubuntu.com trusty-updates/main Translation-en_US                                  
Ign http://nova.clouds.archive.ubuntu.com trusty-updates/universe Translation-en_US                              
Fetched 18.8 MB in 1min 17s (243 kB/s)                                                                           
Reading package lists... Done

root@ubuntuts024:~# apt-get upgrade -y
Reading package lists... Done
Building dependency tree      
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@ubuntuts024:~# passwd ubuntu
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully



References

1.  https://ask.openstack.org/en/question/12499/forcing-mtu-to-1400-via-etcneutrondnsmasq-neutronconf-per-daniels/?comment=25356#comment-25356
Posted by at