實(shí)驗(yàn)?zāi)繕?biāo)
- 判斷NodePort內(nèi)部轉(zhuǎn)發(fā)是否負(fù)載均衡
- 判斷iptables和ipvs相同訪問的情況下能力差距
- 實(shí)驗(yàn)環(huán)境除iptables和ipvs的模式以外，版本倍谜，配置，網(wǎng)絡(luò)插件，均一直
實(shí)驗(yàn)步驟
1.創(chuàng)建多副本deployment分布到不通主機(jī)器（一定要保證pod分布均勻）
# kubectl create deployment nginx-test --image=nginx
# kubectl scale deployment nginx-test --replicas=9
# kubectl get deployment -o wide
2.創(chuàng)建SVC
# kubectl expose deployment nginx-test --type=NodePort --target-port=80 --port=80 --name=nginx-svc
3.修改相關(guān)index用于識(shí)別
# cat index.sh
for i in `kubectl get pod -o wide| grep -v NAME | awk '{print $1":"$7}'`;
do
name=`echo $i | awk -F ":" '{print $1}'`
host=`echo $i | awk -F ":" '{print $2}'`
cmd=`echo 'kubectl exec -it $name -- bash -c "echo' $host '> /usr/share/nginx/html/index.html"'`
eval $cmd
done
4.統(tǒng)計(jì)訪問100次都是那些主機(jī)
# cat sum.sh
log_file="/tmp/sum.txt"
echo > $log_file
start_time=`date "+%s"`
for i in {1..5000};
do
curl -s http://192.168.26.104:32363/ >> $log_file
done
end_time=`date "+%s"`
echo "使用時(shí)間:" $[end_time-start_time]
cat /tmp/sum.txt | sort | uniq -c
python3版本測(cè)試用例
import requests,time
for_sum=5000
url="http://192.168.26.102:30030/"
sum_list={}
start_time=time.time()
for i in range(for_sum):
resp=requests.get(url)
try:
sum_list[resp.content.decode()]=sum_list[resp.content.decode()] + 1
except:
sum_list[resp.content.decode()] = 0
end_time=time.time()
print("用時(shí):", end_time - start_time ,"秒")
print(sum_list)
環(huán)境記錄(svc值有一條,使用python3的測(cè)試代碼)
- iptables
用時(shí): 23.67735481262207 秒
{'k8snode-1\n': 983, 'k8snode-2\n': 954, 'k8snode-5\n': 1014, 'k8snode-4\n': 1030, 'k8snode-3\n': 1014}
用時(shí): 23.920344352722168 秒
{'k8snode-5\n': 1035, 'k8snode-1\n': 978, 'k8snode-3\n': 1002, 'k8snode-2\n': 1002, 'k8snode-4\n': 978}
用時(shí): 23.591750144958496 秒
{'k8snode-5\n': 961, 'k8snode-1\n': 1017, 'k8snode-3\n': 1048, 'k8snode-2\n': 1011, 'k8snode-4\n': 958}
- ipvs
用時(shí): 23.547069787979126 秒
{'k8snode-5\n': 999, 'k8snode-3\n': 999, 'k8snode-2\n': 999, 'k8snode-1\n': 999, 'k8snode-4\n': 999}
用時(shí): 23.893048524856567 秒
{'k8snode-5\n': 999, 'k8snode-3\n': 999, 'k8snode-2\n': 999, 'k8snode-1\n': 999, 'k8snode-4\n': 999}
用時(shí): 23.7876193523407 秒
{'k8snode-5\n': 999, 'k8snode-3\n': 999, 'k8snode-2\n': 999, 'k8snode-1\n': 999, 'k8snode-4\n': 999}
小結(jié)
使用iptables模式的nodeport存在負(fù)載不均衡丁逝，隨著iptables條數(shù)的增加導(dǎo)致不均衡的表現(xiàn)會(huì)體現(xiàn)的越加明顯
