Java的byte数组和Integer互转

byte[] -> int

int result = ByteBuffer.wrap(bytes).getInt();

1	int result = ByteBuffer.wrap(bytes).getInt();

int -> byte[]

byte[] bytes = ByteBuffer.allocate(4).putInt(1695609641).array();

1	byte[] bytes = ByteBuffer.allocate(4).putInt(1695609641).array();

commons-pool2连接池配置

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GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
基本配置：
        //最大连接
        poolConfig.setMaxTotal(100);
        //最大空闲连接
        poolConfig.setMaxIdle(5);
        //最小空闲连接 
        poolConfig.setMinIdle(5);
        //连接满时最多等待时间
        poolConfig.setMaxWaitMillis(5000L);
高级功能：
         //使用时检查对象（默认不检查）
        poolConfig.setTestWhileIdle(true);
        poolConfig.setTestOnCreate(true);
        poolConfig.setTestOnBorrow(true);
        poolConfig.setTestOnReturn(true);
        //jmx启用 之后可以实时的查看线程池对象的状态
        poolConfig.setJmxEnabled(false);
        poolConfig.setJmxNameBase("namebase");
        poolConfig.setJmxNamePrefix("nameprefix");
         //驱逐线程每次检查对象个数
        poolConfig.setNumTestsPerEvictionRun(2);
        //空闲连接被驱逐前能够保留的时间
        poolConfig.setMinEvictableIdleTimeMillis(10000L);
        //当空闲线程大于minIdle 空闲连接能够保留时间，同时指定会被上面的覆盖
        poolConfig.setSoftMinEvictableIdleTimeMillis(10000L);
        //驱逐线程执行间隔时间
        poolConfig.setTimeBetweenEvictionRunsMillis(200000L);
        //放弃长时间占用连接的对象
       AbandonedConfig abandonedConfig=new AbandonedConfig();
       abandonedConfig.setLogAbandoned(true);
       abandonedConfig.setUseUsageTracking(false);
       abandonedConfig.setRemoveAbandonedOnBorrow(true);
       abandonedConfig.setRemoveAbandonedOnMaintenance(true);
       abandonedConfig.setRemoveAbandonedTimeout(20);//second

GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();

基本配置：

//最大连接

poolConfig.setMaxTotal(100);

//最大空闲连接

poolConfig.setMaxIdle(5);

//最小空闲连接

poolConfig.setMinIdle(5);

//连接满时最多等待时间

poolConfig.setMaxWaitMillis(5000L);

高级功能：

//使用时检查对象（默认不检查）

poolConfig.setTestWhileIdle(true);

poolConfig.setTestOnCreate(true);

poolConfig.setTestOnBorrow(true);

poolConfig.setTestOnReturn(true);

//jmx启用之后可以实时的查看线程池对象的状态

poolConfig.setJmxEnabled(false);

poolConfig.setJmxNameBase("namebase");

poolConfig.setJmxNamePrefix("nameprefix");

//驱逐线程每次检查对象个数

poolConfig.setNumTestsPerEvictionRun(2);

//空闲连接被驱逐前能够保留的时间

poolConfig.setMinEvictableIdleTimeMillis(10000L);

//当空闲线程大于minIdle 空闲连接能够保留时间，同时指定会被上面的覆盖

poolConfig.setSoftMinEvictableIdleTimeMillis(10000L);

//驱逐线程执行间隔时间

poolConfig.setTimeBetweenEvictionRunsMillis(200000L);

//放弃长时间占用连接的对象

AbandonedConfig abandonedConfig=new AbandonedConfig();

abandonedConfig.setLogAbandoned(true);

abandonedConfig.setUseUsageTracking(false);

abandonedConfig.setRemoveAbandonedOnBorrow(true);

abandonedConfig.setRemoveAbandonedOnMaintenance(true);

abandonedConfig.setRemoveAbandonedTimeout(20);//second

转载自：https://throwsnew.com/2017/06/12/commons-pool/

Kubernetes操作

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１、Deployment和Pod

文件

apiVersion: apps/v1
kind: Deployment
metadata:
  name: lmsia-abc-server-deployment
spec:
  selector:
    matchLabels:
      app: lmsia-abc-server
  replicas: 2
  template:
    metadata:
      labels:
        app: lmsia-abc-server
    spec:
      containers:
      - name: lmsia-abc-server-ct
        image: coder4/lmsia-abc-server:latest
        ports:
        - containerPort: 8080
        - containerPort: 3000

apiVersion: apps/v1

kind: Deployment

metadata:

name: lmsia-abc-server-deployment

spec:

selector:

matchLabels:

app: lmsia-abc-server

replicas: 2

template:

metadata:

labels:

app: lmsia-abc-server

spec:

containers:

- name: lmsia-abc-server-ct

image: coder4/lmsia-abc-server:latest

ports:

- containerPort: 8080

- containerPort: 3000

创建

kubectl apply -f ./lmsia-abc-server-deployment.yaml

1	kubectl apply -f ./lmsia-abc-server-deployment.yaml

查看关联的Pod

kubectl get pods -l app=lmsia-abc-server

1	kubectl get pods -l app=lmsia-abc-server

删除

kubectl delete deployment lmsia-abc-server-deployment

1	kubectl delete deployment lmsia-abc-server-deployment

强制重启Pod

kubectl get pod PODNAME -n NAMESPACE -o yaml | kubectl replace --force -f -

1	kubectl get pod PODNAME -n NAMESPACE -o yaml \| kubectl replace --force -f -

2、Service

文件
[crayon-5b0b[……]

继续阅读

Ubuntu下安装kubernetes

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sudo apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
sudo cat <<EOF >/etc/apt/sources.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl

sudo apt-get update && apt-get install -y apt-transport-https curl

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

sudo cat <<EOF >/etc/apt/sources.list

deb http://apt.kubernetes.io/ kubernetes-xenial main

EOF

sudo apt-get update

sudo apt-get install -y kubelet kubeadm kubectl

minicube需要单独下载

https://github.com/kubernetes/minikube/releases

在线绘图工具秒杀visio

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https://www.draw.io/

四号程序员

Keep It Simple And Stupid

Java的byte数组和Integer互转

commons-pool2连接池配置

Kubernetes操作

Ubuntu下安装kubernetes

在线绘图工具秒杀visio