Flent is a network performance tool
Given that you followed instructions to deploy operator, you can modify cr.yaml
apiVersion: ripsaw.cloudbulldozer.io/v1alpha1
kind: Benchmark
metadata:
name: flent-benchmark
namespace: benchmark-operator
spec:
clustername: myk8scluster
#elasticsearch:
# url: http://my.elasticsearch.server:80
#test_user: username_to_attach_to_metadata
workload:
# cleanup: true
name: flent
args:
#image: quay.io/username/reponame:tagname
hostnetwork: false
multus:
enabled: false
pin: false
pin_server: "node-0"
pin_client: "node-1"
pair: 1
test_types:
- tcp_download
runtime: 30test_types is a list of all tests it should run.
As of flent 1.3.2, the following tests are available:
bursts : Latency measurements under intermittent UDP bursts
bursts_11e : 802.11e Latency measurements under intermittent UDP bursts
cisco_5tcpup : RTT Fair Realtime Response Under Load
cisco_5tcpup_2udpflood : Cisco 5TCP up + 2 6Mbit UDP
cubic_bbr : Cubic VS BBR smackdown
cubic_cdg : Cubic VS CDG smackdown
cubic_dctcp : Cubic VS DCTCP smackdown
cubic_ledbat : Cubic VS Ledbat smackdown
cubic_ledbat_1 : Cubic vs LEDBAT upload streams w/ping
cubic_reno : Cubic VS Reno smackdown
cubic_westwood : Cubic VS Westwood
dashtest : DASH testing
dslreports_8dn : 8 down - dslreports dsl test equivalent
http : HTTP latency test
http-1down : HTTP get latency with competing TCP download stream
http-1up : HTTP get latency with competing TCP upload stream
http-rrul : HTTP get latency with competing RRUL test
iterated_bidirectional : Iterated TCP bidirectional transfers example
ledbat_cubic_1 : Cubic vs LEDBAT upload streams w/ping
ping : Ping test (ICMP and UDP)
qdisc-stats : Capture qdisc stats
reno_cubic_westwood_cdg : Realtime Response Under Load
(with different congestion control algs)
reno_cubic_westwood_ledbat : Realtime Response Under Load
(with different congestion control algs)
reno_cubic_westwood_lp : Realtime Response Under Load
(with different congestion control algs)
rrul : Realtime Response Under Load
rrul46 : Realtime Response Under Load - Mixed IPv4/6
rrul46compete : Realtime Response Under Load - Mixed v4/v6 compete
rrul_100_up : 100 up vs 1 down - exclusively Best Effort
rrul_50_down : 50 down vs 1 up - exclusively Best Effort
rrul_50_up : 50 up vs 1 down - exclusively Best Effort
rrul_be : Realtime Response Under Load - exclusively Best Effort
rrul_be_iperf : Realtime Response Under Load - exclusively Best Effort (Iperf TCP)
rrul_be_nflows : Realtime Response Under Load - Best Effort, configurable no of flows
rrul_cs8 : Realtime Response Under Load CS8, one flow per CS/precedence level
rrul_icmp : Realtime Response Under Load - Best Effort, only ICMP ping
rrul_noclassification : Realtime Response Under Load - no classification on data flows
rrul_prio : Realtime Response Under Load - Test Prio Queue
rrul_torrent : Torrent-like competition
rrul_up : Realtime Response Under Load - upload only
rtt_fair : RTT Fair Realtime Response Under Load
rtt_fair4be : RTT Fair Realtime Response Under Load
rtt_fair6be : RTT Fair Realtime Response Under Load
rtt_fair_up : RTT Fair upstream only
rtt_fair_var : RTT Fair - variable number of hosts
rtt_fair_var_down : RTT Fair - variable number of hosts (download only)
rtt_fair_var_mixed : RTT Fair - variable number of hosts (mixed up and down)
rtt_fair_var_up : RTT Fair - variable number of hosts (upload only)
sctp_vs_tcp : SCTP vs TCP
tcp_12down : TCP download - 12 streams w/ping
tcp_12up : TCP upload - 12 streams w/ping
tcp_1down : Single TCP download stream w/ping
tcp_1up : Single TCP upload stream w/ping
tcp_1up_noping : Single TCP upload stream
tcp_2down : TCP download - 2 streams w/ping
tcp_2up : TCP upload - 2 streams w/ping
tcp_2up_delay : Two TCP upload streams; 2nd stream started delayed
tcp_2up_square : Two TCP upload streams; 2nd stream started delayed
tcp_2up_square_westwood : Two TCP upload streams; 2nd stream started delayed
tcp_4down : TCP download - 4 streams w/ping
tcp_4up : TCP upload - 4 streams w/ping
tcp_4up_squarewave : Four TCP upload streams; 2nd streams started delayed, cubic vs BBR
tcp_50up : TCP upload - 8 streams w/ping
tcp_6down : TCP download - 6 streams w/ping
tcp_6up : TCP upload - 6 streams w/ping
tcp_8down : TCP download - 8 streams w/ping
tcp_8up : TCP upload - 8 streams w/ping
tcp_bidirectional : Bidirectional TCP streams w/ping
tcp_download : TCP download stream w/ping
tcp_ndown : TCP download - N streams w/ping
tcp_nup : TCP upload - N streams w/ping
tcp_upload : TCP upload stream w/ping
tcp_upload_1000 : 1000 up - exclusively Best Effort
tcp_upload_prio : TCP upload stream w/ToS prio bits
udp_flood : UDP flood w/ping
udp_flood_var_up : UDP flood w/ping - variable number of hosts
udp_flood_var_up_stagger : UDP flood w/ping - variable number of hosts, staggered start
voip : VoIP one-way stream test
voip-1up : VoIP one-way stream test with competing TCP stream
voip-rrul : VoIP one-way stream test with competing RRUL test
Not every test works in benchmark-operator. Tests that require something other than netserver will not work. Tests that require additional arguments will also not work. The voip tests do not work, and the cisco and burst tests do not work.
The tcp_*, udp_, and more should work. tcp_download was the most tested test.
client_resources and server_resources will create flent client's and server's containers with the given k8s compute resources respectively k8s resources
hostnetwork will test the performance of the node the pod will run on.
Note: If you want to run with hostnetwork on OpenShift, you will need to execute the following:
$ oc adm policy add-scc-to-user privileged -z benchmark-operator
image The snafu image built for flent. Optional. Defaults to the cloud-bulldozer one.
pin will allow the benchmark runner place nodes on specific nodes, using the hostname label.
pin_server what node to pin the server pod to.
pin_client what node to pin the client pod to.
multus[1] Configure our pods to use multus.
[1] https://github.com/intel/multus-cni/tree/master/examples
hostnetwork: false
multus:
enabled: false
pair: 2
test_types:
- tcp_download
runtime: 30Will run the flent test tcp_download on two pairs of server and clients for 30 seconds.
The output of tcp_download will include the summary plus the details of the downloads and pings.
If the user desires to test with Multus, use the below Multus NetworkAtachmentDefinition
as an example:
apiVersion: "k8s.cni.cncf.io/v1"
kind: NetworkAttachmentDefinition
metadata:
name: macvlan-range-0
spec:
config: '{
"cniVersion": "0.3.1",
"type": "macvlan",
"master": "eno1",
"mode": "bridge",
"ipam": {
"type": "host-local",
"ranges": [
[ {
"subnet": "11.10.0.0/16",
"rangeStart": "11.10.1.20",
"rangeEnd": "11.10.3.50"
} ] ]
}
}'
---
apiVersion: "k8s.cni.cncf.io/v1"
kind: NetworkAttachmentDefinition
metadata:
name: macvlan-range-1
spec:
config: '{
"cniVersion": "0.3.1",
"type": "macvlan",
"master": "eno1",
"mode": "bridge",
"ipam": {
"type": "host-local",
"ranges": [
[ {
"subnet": "11.10.0.0/16",
"rangeStart": "11.10.1.60",
"rangeEnd": "11.10.3.90"
} ] ]
}
}'
This will use the same IP subnet across nodes, but not overlap IP addresses.
To enable Multus in Ripsaw, here is the relevant config.
...
multus:
enabled: true
client: "macvlan-range-0"
server: "macvlan-range-1"
pin: true
pin_server: "openshift-master-0.dev4.kni.lab.eng.bos.redhat.com"
pin_client: "openshift-master-1.dev4.kni.lab.eng.bos.redhat.com"
...
Once done creating/editing the resource file, you can run it by:
# kubectl apply -f config/samples/flent/cr.yaml # if edited the original one
# kubectl apply -f <path_to_file> # if created a new cr fileapiVersion: ripsaw.cloudbulldozer.io/v1alpha1
kind: Benchmark
metadata:
name: example-benchmark
namespace: benchmark-operator
spec:
clustername: myk8scluster
test_user: test_user # user is a key that points to user triggering ripsaw, useful to search results in ES
elasticsearch:
server: <es_host>
port: <es_port>
workload:
name: flent
args:
hostnetwork: false
multus:
enabled: false
pin: false
pin_server: "node-0"
pin_client: "node-1"
pair: 1
test_types:
- tcp_download
runtime: 30elasticsearch.urlElastic search instance with full URL format. https://elastic.apps.org:9200userprovide a user id to the metadata that will be sent to Elasticsearch, this makes finding the results easier.
By default we will utilize the flent-results index for Elasticsearch.
Deploying the above(assuming pairs is set to 1) would result in
# oc get pods -n benchmark-operator
NAME READY STATUS RESTARTS AGE
benchmark-operator-f84bdbd8f-n6cnc 3/3 Running 0 34m
flent-bench-client-10.116.0.54-533b6892-dc5cd 0/1 Completed 0 32mThe first pod is our Operator orchestrating the Flent workload.
To review the results, oc logs <client>, the top of the output is
the actual workload that was passed to flent (From the values in the custom resource).
Note: If cleanup is not set in the spec file then the client pods will be killed after 600 seconds from it's completion. The server pods will be cleaned up immediately after client job completes
... Trimmed output ...
+-------------------------------------------------- flent Results --------------------------------------------------+
Run : 1
Flent options:
```yaml
hostnetwork: false
pair: 1
test_types:
- tcp_download
runtime: 30
Flent results:
avg median # data pts
Ping (ms) ICMP : 0.12 0.07 ms 350
TCP download : 6778.82 6704.92 Mbits/s 350
+-------------------------------------------------------------------------------------------------------------------+