Building EFA, no network

[melchi0]

Hello, i'm trying to build from scratch following https://wiki.efa-project.org/doku.php?id=building_e.f.a on a cloud KVM hypervisor
But at this stage, network is unreachable


Any hint? Thanks

[pdwalker]

Did you set the DNS server during the setup?

The error message is saying that efa-project.org cannot be resolved which suggests your DNS server has not been specified correctly.

[melchi0]

Yep, tried recursive and manual one. Seems something network related into the os
Tried also to edit resolv.conf manually but losing config on each reboot.. where is the setup wizard located? So i can made some change/tests without rebooting

[pdwalker]

so, can this efa vm reach the internet?

can you use the nslookup command? if so, set your dns to 8.8.8.8 and see if you can resolve any addresses from that machine with those settings.

[henk]

As we have no info whatsoever on your setup, besides dns doesn't work.So trying to get the picture, with my hands tied behind my back, while hung from one feet upside down,while swinging vigorously, and of course blindfolded.

Yep, tried recursive and manual one

What do you mean by manual one?

on a cloud KVM hypervisor

Can you be more specific on the cloud part?
/\
Start the configure menu:

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/usr/local/sbin/EFA-Configure

The saved settings. So check this first

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/etc/EFA-Config

Did you assign the proper network to the (LAN) interface?
Did you assign the proper gateway?
Did you enable recursion?
It doesn't make sense to edit resolv.conf manually

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; generated by /sbin/dhclient-script  <-- (losing config on each reboot)
search EXAMPLE.LAN. EXAMPLE.MAN.
nameserver 127.0.0.1                 -<  unbound!

in /etc/sysconfig/network

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NETWORKING_IPV6=no
IPV6INIT=no
NETWORKING=yes
DHCPV6=no
IPV6_AUTOCONF=no
HOSTNAME=EFA.EXAMPLE.LAN
GATEWAY=xxx.xxx.xxx.xxx      < GATEWAY

For dhcp to generate fixed ip's, you need the mac address of the networkcard.
In the dhcp server (DHCP Static Mappings ) you can assign an ip for this mac address outside the dhcp range.

in /etc/sysconfig/network-scripts/ifcfg-eth0

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DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes

NetworkManager will manage the interfaces by default unless you add: NM_CONTROLLED=no
Check /etc/hosts

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127.0.0.1       localhost.localdomain   localhost localhost4 localhost4.localdomain4
xxx.xxx.xxx.xxx  EFA.EXAMPLE.LAN EFA

Check Unbound config ( and evt forwarders)
search google:

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site:forum.efa-project.org unbound  DNS

[melchi0]

Thank you all for the replies, this staging VM is hosted on Hetzner Cloud, the configuration is done via DHCP since, with CX vServers, the public IP is assigned to the interal IP via 1:1 NAT

Just made some tests:
Boot and configured DHCP, made networking works
Update EFA to the latest version
Issued EFA-Init and followed wizard, networking step takes right ip/sub/gateway
After confirm settings, the autoconfiguration give me the same error
Spawn a shell: ping 8.8.8.8 = Network is unreachable

A rapid look to changes:
resolv.conf modified (from hetzner DNS to 127.0.0.1)
/etc/sysconfig/network: new line added "GATEWAY=172.31.1.1" (correct gateway)
/etc/sysconfig/network-scripts/ifcfg-eth0 modified from DHCP to manual with right settings
routes modified, only a 169.254.0.0 present

Hope this help

[henk]

So DHCP provides network access also after reboot

Did you check?

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/etc/udev/rules.d/70-persistent-net.rules

Check for duplicates ( mac <=> if-name)