Open Stack

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 <ashokkumaran.b at 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 <
> thiagocmartinsc at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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
>>
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>>
>
>
> --
> Regds,
>
> Ashok ,
> Delivery Consultant,
> HP.
>
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