Nginx上配置WebSocket

2019-08-29

下面是wss://ssl.highlight.top/score/的配置

http {
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    upstream wsbackend{
        server localhost:58880;  # ws://ip:port
    }

    server {
        listen              443 ssl;
        server_name         ssl.highlight.top;
        keepalive_timeout   70;

        ssl_certificate     ssl.highlight.top.pem; # 下载自阿里云的免费ssl
        ssl_certificate_key ssl.highlight.top.key; # 这两个文件放在和nginx.conf同一目录
        ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers         HIGH:!aNULL:!MD5;

        location /score/ {
            proxy_pass http://wsbackend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
        }
    }
}

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Linux性能优化-实验报告28(TBD)

2019-08-13

1 2	git clone https://github.com/feiskyer/linux-perf-examples cd linux-perf-examples/mysql-slow

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Linux性能优化-实验报告27

2019-08-13

1	docker run --name=app -p 10000:80 -itd feisky/word-pop

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Node.js获取文件MD5例子

2019-08-08

function md5(filename, cb) {
  const crypto = require('crypto');
  const fs = require('fs');

  const hash = crypto.createHash('md5');

  const input = fs.createReadStream(filename);
  input.on('readable', () => {
    // Only one element is going to be produced by the
    // hash stream.
    const data = input.read();
    if (data)
      hash.update(data);
    else {
      cb(hash.digest('hex'));
    }
  });
}

const filename = "/tmp/test.xt";

md5(filename, result => {
    console.log(filename + " md5: ", result)
})

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怎样使用iframe套用其他网页

2019-08-08

1	<iframe style="position:fixed; top:0; left:0; bottom:0; right:0; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden; z-index:999999;" src="" frameborder="0"></iframe>

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怎样清除Mac的DNS缓存

2019-08-08

1	sudo killall -HUP mDNSResponder

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Linux性能优化-实验报告26

2019-08-06

1	docker run -v /tmp:/tmp --name=app -itd feisky/logapp

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Linux性能优化-实验报告23

2019-08-06

最后留的问题做的实验。看的下面的评论，我自己使用的bcc cachetop，但看结果毫无变化

1 2	# cachetop #使用了echo 3 >/proc/sys/vm/drop_caches，但结果一直是下面的情况 09:50:57 Buffers MB: 6202 / Cached MB: 386 / Sort: HITS / Order: ascending

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Linux性能优化-实验报告19

2019-08-06

root@perf:/home/ykg# numactl --hardware
available: 1 nodes (0)
node 0 cpus: 0 1
node 0 size: 7952 MB
node 0 free: 6841 MB
node distances:
node   0
  0:  10

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Linux性能优化-实验报告18

2019-08-06

# install sysstat docker
sudo apt-get install -y sysstat docker.io

# Install bcc
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4052245BD4284CDD
echo "deb https://repo.iovisor.org/apt/bionic bionic main" | sudo tee /etc/apt/sources.list.d/iovisor.list
sudo apt-get update
sudo apt-get install -y bcc-tools libbcc-examples linux-headers-$(uname -r)

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笔记