Martin, There was a discussion happened on this topic already.
Either set the MTU value in the instance to 1454 (cirros$ sudo ip link set mtu 1454 dev eth0) or Increase the mtu to 1546 on the interfaces on the network node and the computes nodes that have the GRE tunnel endpoint IPs. Best, Ashok On Mon, Aug 5, 2013 at 12:02 PM, Martinx - ジェームズ <thiagocmarti...@gmail.com>wrote: > Guys, > > I followed this guide: > https://github.com/mseknibilel/OpenStack-Grizzly-Install-Guide/blob/OVS_MultiNode/OpenStack_Grizzly_Install_Guide.rst > to > build my latest cloud (PoC) and, from within my Instances, I'm facing some > connectivity issues, like this: > > --- > Instance ip config > --- > ubuntu@ubu-1:~$ ip r > default via 10.100.1.1 dev eth0 metric 100 > 10.100.1.0/24 dev eth0 proto kernel scope link src 10.100.1.5 > --- > > --- > Test #1 - ping google - okay... > --- > root@ubu-1:~# ping -c 1 google.com > PING google.com (74.125.234.110) 56(84) bytes of data. > 64 bytes from gru03s08-in-f14.1e100.net (74.125.234.110): icmp_req=1 > ttl=57 time=75.7 ms > --- > > --- > Test #2 - install ruby gem "bundler" - not okay... > --- > root@ubu-1:~# gem install bundler > ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) > too many connection resets ( > http://production.cf.rubygems.org/gems/bundler-1.3.5.gem) > --- > > Also, I can ping rubygems server, look: > > --- > root@cir-1:~# ping production.cf.rubygems.org > PING d2chzxaqi4y7f8.cloudfront.net (54.230.58.161) 56(84) bytes of data. > 64 bytes from server-54-230-58-161.gru1.r.cloudfront.net (54.230.58.161): > icmp_req=1 ttl=56 time=5.09 ms > --- > > And I can telnet it too! > > --- > root@cir-1:~# telnet production.cf.rubygems.org 80 > Trying 54.230.58.161... > Connected to d2chzxaqi4y7f8.cloudfront.net. > Escape character is '^]'. > ^]quit > --- > > But "gem install bundler" always fails... > > From within ubu-1's gateway, the "network node" with l3 agent + > namespaces, "gem install bundler" works as expected... > > Weird thing is, I can run "apt-get update / upgrade" without any issues on > "ubu-1" instance... Everything is just opened to the Internet... > > All tenants have this weird problem... I tried different setups but, can't > figure it out by myself... I appreciate any help! > > I'm running tcpdump at the network node, while trying to run "gem install > bundler" from within "ubu-1" instance: > > --- > root@network:~# ip netns exec > qrouter-475257b2-836c-43a1-98a8-8f29ae1ce1b5 tcpdump -i qr-7a44c1d0-7e > --- > > Output: > --- > 02:27:42.279268 IP 10.100.1.5 > server-54-230-58-171.gru1.r.cloudfront.net: > ICMP 10.100.1.5 unreachable - need to frag (mtu 1454), length 556 > > more on paste bin: > > http://paste.openstack.org/show/43153/ > --- > > From within network node (ubu-1 instance gateway), gem install it works... > > --- > root@network:~# gem install bundler > Fetching: bundler-1.3.5.gem (100%) > Successfully installed bundler-1.3.5 > 1 gem installed > Installing ri documentation for bundler-1.3.5... > Installing RDoc documentation for bundler-1.3.5... > --- > > Any thoughts?! Apparently, the package didn't goes back to the Instance... > But I don't know how to fix it... =P > > I tried a lots of variants of this setup (playing with quantum networks, > routers and Floating IPs) but, no success... I can't run "gem install > bundler" form within any Instance... But I can navigate, use apt-get update > and etc... :-/ > > NOTE: I noted that the rubygems is hosted at the AWS + CloudFront, and, > the IP of it keep changing... It differs a bit from this mail and pastebin > that I posted. > > NOTE 2: The ubu-1 have no Floating IP attached to it, I'm trying to run > "gem install bundler" from VNC console after changing "ubuntu" user > password... Everything here is based on Ubuntu 12.04.2 + Grizzly from UCA, > including Instances (ubu-1) and servers (network, controller, node, etc)... > > Tks! > Thiago > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > -- Regds, Ashok , Delivery Consultant, HP.
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