大规模启动容器场景延迟较高

#!/bin/bash

total=100

echo "start delete old pods."
kubectl get jobs | grep "yanzu-test" | awk '{print $1}' | grep -v NAME | xargs kubectl delete job > /dev/null 2>&1
kubectl delete events --all
echo "delete old pods finish"

echo "staring..."
start=$(date +%s)
echo $start
date
declare -i i=1
while ((i<=$total))
do
    echo "start" $i
    kubectl create -f run.yaml &
    let ++i
done


echo "wait for 30s"
sleep 30s
completed=`kubectl get pods | grep "yanzu-test" | awk '{print $3}' | grep -v Completed`
while [ -n "$completed" ]
do
    echo "waiting for complete:" $completed
    sleep 3
    completed=`kubectl get pods | grep "yanzu-test" | awk '{print $3}' | grep -v Completed`
done

echo "finish create jobs"

declare -i sum=0 max=0 sum_sch=0 sum_cre=0 sum_sta=0 max_sch=0 max_cre=0 max_sta=0 sum_pul=0 max_pul=0

pods=`kubectl get pods | grep "yanzu-test" | awk '{print $1}'`
for pod in ${pods[@]}
do
    timet=`kubectl describe pod $pod | grep "Started:" | awk '{print $6}'`
    p_timet=$(date --date $timet)
    # echo "Pod $pod start time is $p_timet"
    mils=$(date +%s --date $timet)
    used=$((mils-start))
    if((used>max))
    then
      max=used
    fi
    sch_time=`kubectl get events -o=custom-columns=LastSeen:.metadata.creationTimestamp,Type:.type,Object:.involvedObject.name,Reason:.reason | grep "$pod" | grep "Scheduled" | awk '{print $1}'`
    pul_time=`kubectl get events -o=custom-columns=LastSeen:.lastTimestamp,Type:.type,Object:.involvedObject.name,Reason:.reason | grep "$pod" | grep "Pulled" | awk '{print $1}'`
    cre_time=`kubectl get events -o=custom-columns=LastSeen:.lastTimestamp,Type:.type,Object:.involvedObject.name,Reason:.reason | grep "$pod" | grep "Created" | awk '{print $1}'`
    sta_time=`kubectl get events -o=custom-columns=LastSeen:.lastTimestamp,Type:.type,Object:.involvedObject.name,Reason:.reason | grep "$pod" | grep "Started" | awk '{print $1}'`
    sch_time_t=$(date +%s --date $sch_time)
    sch_used=$((sch_time_t-start))
    pul_time_t=$(date +%s --date $pul_time)
    pul_used=$((pul_time_t-sch_time_t))
    cre_time_t=$(date +%s --date $cre_time)
    cre_used=$((cre_time_t-pul_time_t))
    sta_time_t=$(date +%s --date $sta_time)
    sta_used=$((sta_time_t-cre_time_t))
    if((sch_used>max_sch))
    then
      max_sch=sch_used
    fi
    if((pul_used>max_pul))
    then
      max_pul=pul_used
    fi
    if((cre_used>max_cre))
    then
      max_cre=cre_used
    fi
    if((sta_used>max_sta))
    then
      max_sta=sta_used
    fi
    sum=$((sum+used))
    sum_sch=$((sum_sch+sch_used))
    sum_pul=$((sum_pul+pul_used))
    sum_cre=$((sum_cre+cre_used))
    sum_sta=$((sum_sta+sta_used))
done

echo "Avg Scheduled Time: $((sum_sch/100))"
echo "Avg Pulled Time: $((sum_pul/100))"
echo "Avg Created Time: $((sum_cre/100))"
echo "Avg Started Time: $((sum_sta/100))"
echo "Avg Time: $((sum/100))"
echo "Max Scheduled Time: $max_sch"
echo "Max Pulled Time: $max_pul"
echo "Max Created Time: $max_cre"
echo "Max Started Time: $max_sta"
echo "Max Time: $max"

echo "finish test"

apiVersion: batch/v1
kind: Job
metadata:
  generateName: yanzu-test-
spec:
  completions: 1
  parallelism: 1
  backoffLimit: 0
  activeDeadlineSeconds: 3600
  template:
    spec:
      restartPolicy: Never
      containers:
      - name: my-container
        image: openjdk:8u292-jdk
        resources:
          requests:
            memory: "1Gi"
            cpu: "1000m"
          limits:
            memory: "1Gi"
            cpu: "1000m"
        command: [ "/bin/bash", "-c", "sleep 21s"]