Direct Download with IPv6 only fails

[wido]

ISSUE TYPE

• Bug Report

COMPONENT NAME

KVM Agent

CLOUDSTACK VERSION

master / 4.12

CONFIGURATION

Hypervisors are IPv6-only without a default IPv4 route to the internet.

OS / ENVIRONMENT

Ubuntu 18.04
OpenJDK 1.8

root@n03:~# java -version
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-1ubuntu0.18.04.1-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
root@n03:~#

SUMMARY

When a hypervisor has no IPv4 default route Direct Download of a template failes.

2018-11-22 14:10:50,281 DEBUG [commons.httpclient.MultiThreadedHttpConnectionManager] (agentRequest-Handler-4:null) (logid:022777d5) HttpConnectionManager.getConnection:  config = HostConfiguration[host=http://packer-templates.o.auroraobjects.eu], timeout = 0
2018-11-22 14:10:50,282 DEBUG [commons.httpclient.MultiThreadedHttpConnectionManager] (agentRequest-Handler-4:null) (logid:022777d5) Allocating new connection, hostConfig=HostConfiguration[host=http://packer-templates.o.auroraobjects.eu]
2018-11-22 14:10:50,287 DEBUG [commons.httpclient.HttpConnection] (agentRequest-Handler-4:null) (logid:022777d5) Open connection to packer-templates.o.auroraobjects.eu:80
2018-11-22 14:10:50,322 DEBUG [commons.httpclient.HttpMethodDirector] (agentRequest-Handler-4:null) (logid:022777d5) Closing the connection.
2018-11-22 14:10:50,323 INFO  [commons.httpclient.HttpMethodDirector] (agentRequest-Handler-4:null) (logid:022777d5) I/O exception (java.net.ConnectException) caught when processing request: Network is unreachable (connect failed)
2018-11-22 14:10:50,323 DEBUG [commons.httpclient.HttpMethodDirector] (agentRequest-Handler-4:null) (logid:022777d5) Network is unreachable (connect failed)

root@n03:~# ip r
169.254.0.0/16 dev cloud0 proto kernel scope link src 169.254.0.1 
172.16.0.0/24 dev cloudbr1 proto kernel scope link src 172.16.0.13 
192.168.0.0/24 dev vlan300 proto kernel scope link src 192.168.0.13 
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown 
239.0.7.208 dev vlan300 scope link 
root@n03:~# 

root@n03:~# ip -6 r
2a00:f10:114::/64 dev enp4s0f1 proto ra metric 1024 pref medium
2a00:f10:114:2000::/64 dev brvx-2000 proto kernel metric 256 expires 2591725sec pref medium
default via fe80::a236:9fff:fe0d:abbe dev enp4s0f1 proto ra metric 1024 mtu 9000 pref medium
default via fe80::9889:27ff:fe04:896e dev brvx-2000 proto ra metric 1024 expires 1525sec hoplimit 64 pref medium
root@n03:~#

The hypervisor is IPv6 capable and the URL is reachable over IPv6 as well, but the hypervisor / KVM Agent fails to download it.

[yadvr]

/cc @nvazquez

[wido]

java.net.preferIPv6Addresses

That is set to True already in the Agent, so it should use IPv6 as well.

packer-templates.o.auroraobjects.eu is an alias for o.auroraobjects.eu.
o.auroraobjects.eu has address 185.107.215.161
o.auroraobjects.eu has IPv6 address 2a05:1500:ff01:7::161

root@n03:~# curl -I http://packer-templates.o.auroraobjects.eu/ubuntu1604-20G.qcow2
HTTP/1.1 200 OK
Bucket: packer-templates
x-amz-request-id: tx000000000000002883202-005bf6c446-26cf361-ams02
Date: Thu, 22 Nov 2018 14:59:18 GMT
Content-Length: 687472640
Last-Modified: Sun, 18 Nov 2018 04:51:48 GMT
ETag: "c0d732368be84093e92ca1727571d2b9-44"
x-amz-meta-s3cmd-attrs: atime:1542516274/ctime:1542516454/gid:999/gname:gitlab-runner/md5:ed9b4b7d8f2960b19057e49bc8a196b5/mode:33188/mtime:1542516454/uid:999/uname:gitlab-runner
Content-Type: application/octet-stream
Age: 1
Server: AuroraObjects
X-Cache-Hit: Yes
X-Cache-Hits: 1
Accept-Ranges: bytes
Connection: keep-alive

root@n03:~#

The host can reach the URL without any problems, but it is the Agent which seems to prefer IPv4 over IPv6.

[yadvr]

ping @nvazquez can you advise?

[nvazquez]

Thanks, @wido for reporting this issue. I'll work on it

[yadvr]

Moved to next minor milestone @nvazquez

[DaanHoogland]

@nvazquez did #3374 solve this? (can we close this?)

[wido]

No, this is not resolved and still on the todo.

It's on the internal todo of PCextreme as well.