Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[wt-newell]

2a02:180:6:1::4a8 is offline again. smokeping shows it stopped replying at Jan 8 2:40 UTC. Not responding to pings, http, or ssh. Control panel "Server Status" and "Server on/off" are both green (powered up).

mtr from a V2 free to the beta server 2a02:180:6:1::4a8 after it went offline :

Code: [Select]

                                                                                                                Packets               Pings
 Host                                                                                                         Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. AS???    fd78:232c:fe45:934b::1 (fd78:232c:fe45:934b::1)                                                   0.7% 10497    0.1   0.1   0.1   0.5   0.1
 2. AS35366  2a02-0180-0006-0001-0000-0000-0000-0001.blue.kundencontroller.de (2a02:180:6:1::1)               93.6% 10497    0.7   2.3   0.5 185.8   9.7
 3. ???

I'm going to reboot it and see if it was running with no network.

Reboot ok, now I can log in again. From the log files, it was powered up with no network! The beta server was running mtr to an external server every 30 minutes, and you can see it had network access at 2:30 UTC, but not at 3:00 UTC or later:

Code: [Select]

Start: 2021-01-08T02:30:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1       0.0%    10    0.1   0.1   0.1   0.1   0.0
  2. AS35366  2a02:180:6:1::1              0.0%    10    3.3   8.2   0.7  28.0  10.7
  3. AS35366  2a02:180:6:9::a              0.0%    10    1.1   7.9   0.6  27.9  10.4
  4. AS35366  2a02:180:6:7::a              0.0%    10   27.9  24.3  20.1  28.0   3.8
  5. AS174    2001:978:2:2c::89:1          0.0%    10   22.9  27.6  20.6  46.5   7.8
  6. AS174    2001:550:0:1000::9a36:3899  40.0%    10   20.8  21.6  20.8  24.4   1.4
  7. AS174    2001:550:0:1000::8275:10a   20.0%    10   21.2  23.8  20.9  28.1   3.5
  8. AS174    2001:978:2:40::2b:2          0.0%    10   19.8  22.1  19.6  27.9   3.4
  9. AS49981  2a00:7c80:ffff::95:183       0.0%    10   19.9  22.8  19.9  28.1   3.6

Start: 2021-01-08T03:00:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.3   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

Start: 2021-01-08T03:30:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.4   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

Start: 2021-01-08T04:00:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.4   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

Start: 2021-01-08T04:30:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.4   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

Start: 2021-01-08T05:00:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.4   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

Start: 2021-01-08T05:30:01+0000
HOST: 2a02:180:6:1::4a8               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    fd78:232c:fe45:934b::1   0.0%    10    0.1   0.1   0.1   0.3   0.1
  2. AS???    ???                     100.0    10    0.0   0.0   0.0   0.0   0.0

So, is the beta test server losing network, or is the host the problem? Not sure how to tell.

Thoughts?

[Forum-Support2]

Hello,

this looks like a ressource issue of the VPS. Please check your services running. In most cases of too much RAM uses, the VPS will kill services randomly.

[wt-newell]

What makes you think it's running out of ram or killing services?

No evidence of hitting resource limits--no OOM messages in the log, munin ram graphs show 718 MB unused and a max of 210 MB active. This tells me ram isn't the problem. No log messages showing that any services were shut off. (There are log messages showing services couldn't access the network.)

Could it be a routing problem? Rebooting the VPS seems to fix it, so it seems unlikely. Unless rebooting the guest somehow alters routing on the host.

Everything I'm seeing so far looks like someone pulled the (virtual) network cable.

Just for fun, I'll log interface and memory stats along with the mtr. If the pattern holds, it should go offline in a few days and maybe we'll know more.