rocket
(rocket)
May 19, 2023, 6:14pm
1
I am trying to use ovn but I am running into a performance issue.
I have downloaded the speedtest-cli and on the host I am getting 50M up and down
when using lxdfan I am also getting 50M up and down
when using ovn I am getting 6M Down and 6M Up.
I am not even sure where to start troubleshooting this issue.
Thanks in advance.
1 Like
tomp
(Thomas Parrott)
May 22, 2023, 10:37am
2
What is your network layout?
Please show lxc network show <uplink network>
and lxc network show <ovn network>
rocket
(rocket)
May 22, 2023, 2:30pm
3
lxc network show UPLINK
config:
dns.nameservers: 8.8.8.8,1.1.1.1
ipv4.gateway: 64.X.X.65/28
ipv4.ovn.ranges: 64.X.X.69-64.X.X.69
ipv4.routes: 64.X.X.64/28
volatile.last_state.created: "false"
description: ""
name: UPLINK
type: physical
used_by:
- /1.0/networks/ovn0
managed: true
status: Created
locations:
- lxd1
- lxd2
- lxd3
lxc network show ovn0
config:
bridge.mtu: "1442"
dns.domain: foo.net
ipv4.address: 10.1.1.1/24
ipv4.nat: "true"
ipv6.address: fd42:9ce4:b0ee:e3ff::1/64
ipv6.nat: "true"
network: UPLINK
volatile.network.ipv4.address: 64.X.X.69
description: ""
name: ovn0
type: ovn
used_by:
- /1.0/instances/c2
- /1.0/instances/c3
managed: true
status: Created
locations:
- lxd1
- lxd2
- lxd3
lxc network info UPLINK
Error: Network interface "UPLINK" not found
username@lxd1:~$ lxc network status UPLINK
Error: unknown command "status" for "lxc network"
username@lxd1:~$ lxc network info ovn0
Name: ovn0
MAC address: 00:aa:3e:bb:74:d2
MTU: 1442
State: up
Type: broadcast
IP addresses:
inet 10.1.1.1/24 (link)
inet6 fd42:9ce4:b0ee:e3ff::1/64 (link)
Network usage:
Bytes received: 0B
Bytes sent: 0B
Packets received: 0
Packets sent: 0
OVN:
Chassis: lxd1
rocket
(rocket)
May 22, 2023, 2:31pm
4
speeds are near native if the container is on the host with the chassis
speeds drop by half if the container runs on any of the other hosts.
I tested the same container by stopping and moving it between each of the hosts and testing the speeds
rocket
(rocket)
May 22, 2023, 2:31pm
5
I installed speedtest-cli and iperf
I just issued the command speedtest to test the speeds.
iperf is showing slow traffic between containers.
tomp
(Thomas Parrott)
May 22, 2023, 2:35pm
6
And you’ve confirmed the speeds between the cluster members is fast outside of OVN?
rocket
(rocket)
May 22, 2023, 3:49pm
7
yes. there is a 10G internode link that is giving 10Gb speeds.
tomp
(Thomas Parrott)
May 23, 2023, 7:25am
8
What does ip a
on each host show?
rocket
(rocket)
May 23, 2023, 10:47am
9
We can close this. I used different test tools and it seems to have resolved itself.
I am not sure i understand why i was getting different results with the speedtest tool. But the netflix fast tool is showing proper speeds. Something else might be going on but at the moment i cannot reproduce my earlier results.
1 Like