Can't ping localhost - pveproxy fails to start

[c0urier]

Hi guys.

This is my second reinstall of a test host and I've run into the same issue twice. I thought i'd see if anyone here has any idea of what is going on.
It's installed from the proxmox 4.4 ISO, worked directly after installation - After first apt update/dist-upgrade I started seeing below.

So what happens is, if I try to start pveproxy is fails with the following:

-- Unit pveproxy.service has begun starting up.
Dec 31 15:35:56 pve01 pveproxy[3266]: start failed - failed to get address info for: pve01: System error
Dec 31 15:35:56 pve01 pveproxy[3266]: start failed - failed to get address info for: pve01: System error
Dec 31 15:35:56 pve01 systemd[1]: pveproxy.service: control process exited, code=exited status=255
Dec 31 15:35:56 pve01 systemd[1]: Failed to start PVE API Proxy Server.
-- Subject: Unit pveproxy.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit pveproxy.service has failed.
--
-- The result is failed.
Dec 31 15:35:56 pve01 systemd[1]: Unit pveproxy.service entered failed state.

root@pve01:/etc/pve> ifconfig lo
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:844 (844.0 B) TX bytes:844 (844.0 B)

root@pve01:/etc/pve> ls -la /etc/hosts
-rw-r--r-- 1 root root 295 Dec 31 02:59 /etc/hosts

root@pve01:/etc/pve> ls -la /etc/nsswitch.conf
-rw-r--r-- 1 root root 497 Dec 31 02:43 /etc/nsswitch.conf

root@pve01:/etc/pve> grep hosts /etc/nsswitch.conf

hosts: files dns

root@pve01:/etc/pve> cat /etc/hosts

127.0.0.1 localhost.localdomain localhost
10.1.0.30 pve01.c0urier.net pve01 pvelocalhost

# The following lines are desirable for IPv6 capable hosts

::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

ping/dns tests:

root@pve01:/etc/pve> ping localhost
ping: unknown host localhost

root@pve01:/etc/pve> ping pve01
ping: unknown host pve01

root@pve01:/etc/pve> ping 10.1.0.30
PING 10.1.0.30 (10.1.0.30) 56(84) bytes of data.
64 bytes from 10.1.0.30: icmp_seq=1 ttl=64 time=0.017 ms
64 bytes from 10.1.0.30: icmp_seq=2 ttl=64 time=0.018 ms
^C
--- 10.1.0.30 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.017/0.017/0.018/0.004 ms

root@pve01:/etc/pve> ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.009 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.029 ms
^C
--- 127.0.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.009/0.019/0.029/0.010 ms

root@pve01:/etc/pve> host pve01
pve01.c0urier.net has address 10.1.0.30

root@pve01:/etc/pve> pveversion -v

proxmox-ve: 4.4-77 (running kernel: 4.4.35-1-pve)
pve-manager: not correctly installed (running version: 4.4-5/c43015a5) <--- Tried reinstall, can't due to pveproxy
pve-kernel-4.4.35-1-pve: 4.4.35-77
lvm2: 2.02.116-pve3
corosync-pve: 2.4.0-1
libqb0: 1.0-1
pve-cluster: 4.0-48
qemu-server: 4.0-102
pve-firmware: 1.1-10
libpve-common-perl: 4.0-85
libpve-access-control: 4.0-19
libpve-storage-perl: 4.0-71
pve-libspice-server1: 0.12.8-1
vncterm: 1.2-1
pve-docs: 4.4-1
pve-qemu-kvm: 2.7.0-10
pve-container: 1.0-90
pve-firewall: 2.0-33
pve-ha-manager: 1.0-38
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u2
lxc-pve: 2.0.6-5
lxcfs: 2.0.5-pve2
criu: 1.6.0-1
novnc-pve: 0.5-8
smartmontools: 6.5+svn4324-1~pve80
zfsutils: 0.6.5.8-pve13~bpo80

root@pve01:/etc/pve> lsb_release -irc
Distributor ID: Debian
Release: 8.6
Codename: jessie

Any ideas or any information missing please let me know.

 

[dietmar]

What is the output of

# cat /etc/hostname

Besides, ping result "ping: unknown host pve01" is really strange. I am unable to see why this happens...

 

[c0urier]

Hi dietmar, thanks for getting back to me.

root@pve01:/etc/pve> cat /etc/hostname
pve01
root@pve01:/etc/pve> hostname
pve01
root@pve01:/etc/pve> hostname -f
pve01.c0urier.net
root@pve01:/etc/pve> hostname -i
10.1.0.30

 

[dietmar]

I am out of ideas, sorry...

 

[c0urier]

Okay thanks dietmar.. I will try a third reinstall and do baby steps and see where it goes wrong.

I'll let you know if I find anything out of the ordinary besides what is already posted.

Happy new years to you.

 

[wbumiller]

If you run into this again please include the output of

# strace -f ping localhost

And paste the complete unmodified /etc/nsswitch.conf file.

 

[manu]

Besides the strace command above, the output of

getent ahosts localhost

would be interesting. getent allows access to the nsswitch database via the command line.

 

[c0urier]

Thanks. No idea what caused it, third reinstall and no issues so far.

I'll keep those two in mind for next time.

@manu nsswitch was not modified - Tried copying nsswitch from a working host. So doubtful it was corrupted.

 

[Philippe Vaucher]

I had the exact same problem, what solved it is:

chmod +x /*

Basically, all the root folders had lost their `x` flag, and thus a lot of binaries didn't behave properly.