Good to know! "ip link set mtu 1454 dev eth0" from within the Instance fixed my problem!
Thank you! Best, Thiago On 5 August 2013 03:55, Ashok Kumaran <ashokkumara...@gmail.com> wrote: > 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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