Linux

nginx及php-fpm优化

2020-12-04   |   Linux   |   Linux

简单的讲讲nginx+php的一些常用优化，以及相关的内核参数优化。

Nginx 优化 #

1. TCP 与 UNIX 套接字 #

UNIX 域套接字提供的性能略高于 TCP 套接字在回送接口上的性能（较少的数据复制，较少的上下文切换）。如果每个服务器需要支持超过 1000 个连接，请使用 TCP 套接字 - 它们可以更好地扩展。

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[supervisord]填坑之最大连接数

2020-08-27   |   Linux   |   Linux

修改supervisord配置突破1024最大连接数

问题描述 #

最近在使用supervisord服务时发现，无论如何修改系统的最大连接数，由supervisord管理的程序都无法突破1024的限制。

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supervisor 常见坑及解决办法

2020-07-14   |   Linux   |   Linux

Too many open files、获取不到$HOME等

Too many open files #

vim /etc/supervisord.conf
[supervisord]
minfds=81920
minprocs=81920

# systemctl restart supervisord

获取不到$HOME #

[program:apache2]
command=/home/chrism/bin/httpd -c "ErrorLog /dev/stdout" -DFOREGROUND
user=chrism
environment=HOME="/home/chrism",USER="chrism"

supervisorctl update

linux nvidia 获取显卡信息

2020-06-04   |   Linux   |   Linux

使用deviceQuery获取显卡信息

环境 #

Linux、nvidia、cuda

命令 #

/usr/local/cuda/extras/demo_suite/deviceQuery

 CUDA Device Query (Runtime API) version (CUDART static linking)

Detected 2 CUDA Capable device(s)

Device 0: "GeForce RTX 2080 Ti"
  CUDA Driver Version / Runtime Version          10.1 / 10.1
  CUDA Capability Major/Minor version number:    7.5
  Total amount of global memory:                 11019 MBytes (11554717696 bytes)
  (68) Multiprocessors, ( 64) CUDA Cores/MP:     4352 CUDA Cores
  GPU Max Clock rate:                            1545 MHz (1.54 GHz)
  Memory Clock rate:                             7000 Mhz
  Memory Bus Width:                              352-bit
  L2 Cache Size:                                 5767168 bytes
  Maximum Texture Dimension Size (x,y,z)         1D=(131072), 2D=(131072, 65536), 3D=(16384, 16384, 16384)
  Maximum Layered 1D Texture Size, (num) layers  1D=(32768), 2048 layers
  Maximum Layered 2D Texture Size, (num) layers  2D=(32768, 32768), 2048 layers
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       49152 bytes
  Total number of registers available per block: 65536
  Warp size:                                     32
  Maximum number of threads per multiprocessor:  1024
  Maximum number of threads per block:           1024
  Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
  Max dimension size of a grid size    (x,y,z): (2147483647, 65535, 65535)
  Maximum memory pitch:                          2147483647 bytes
  Texture alignment:                             512 bytes
  Concurrent copy and kernel execution:          Yes with 3 copy engine(s)
  Run time limit on kernels:                     No
  Integrated GPU sharing Host Memory:            No
  Support host page-locked memory mapping:       Yes
  Alignment requirement for Surfaces:            Yes
  Device has ECC support:                        Disabled
  Device supports Unified Addressing (UVA):      Yes
  Device supports Compute Preemption:            Yes
  Supports Cooperative Kernel Launch:            Yes
  Supports MultiDevice Co-op Kernel Launch:      Yes
  Device PCI Domain ID / Bus ID / location ID:   0 / 1 / 0
  Compute Mode:
     < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >

Device 1: "GeForce RTX 2080 Ti"
  CUDA Driver Version / Runtime Version          10.1 / 10.1
  CUDA Capability Major/Minor version number:    7.5
  Total amount of global memory:                 11019 MBytes (11554717696 bytes)
  (68) Multiprocessors, ( 64) CUDA Cores/MP:     4352 CUDA Cores
  GPU Max Clock rate:                            1545 MHz (1.54 GHz)
  Memory Clock rate:                             7000 Mhz
  Memory Bus Width:                              352-bit
  L2 Cache Size:                                 5767168 bytes
  Maximum Texture Dimension Size (x,y,z)         1D=(131072), 2D=(131072, 65536), 3D=(16384, 16384, 16384)
  Maximum Layered 1D Texture Size, (num) layers  1D=(32768), 2048 layers
  Maximum Layered 2D Texture Size, (num) layers  2D=(32768, 32768), 2048 layers
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       49152 bytes
  Total number of registers available per block: 65536
  Warp size:                                     32
  Maximum number of threads per multiprocessor:  1024
  Maximum number of threads per block:           1024
  Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
  Max dimension size of a grid size    (x,y,z): (2147483647, 65535, 65535)
  Maximum memory pitch:                          2147483647 bytes
  Texture alignment:                             512 bytes
  Concurrent copy and kernel execution:          Yes with 3 copy engine(s)
  Run time limit on kernels:                     No
  Integrated GPU sharing Host Memory:            No
  Support host page-locked memory mapping:       Yes
  Alignment requirement for Surfaces:            Yes
  Device has ECC support:                        Disabled
  Device supports Unified Addressing (UVA):      Yes
  Device supports Compute Preemption:            Yes
  Supports Cooperative Kernel Launch:            Yes
  Supports MultiDevice Co-op Kernel Launch:      Yes
  Device PCI Domain ID / Bus ID / location ID:   0 / 2 / 0
  Compute Mode:
     < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >
> Peer access from GeForce RTX 2080 Ti (GPU0) -> GeForce RTX 2080 Ti (GPU1) : Yes
> Peer access from GeForce RTX 2080 Ti (GPU1) -> GeForce RTX 2080 Ti (GPU0) : Yes

deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 10.1, CUDA Runtime Version = 10.1, NumDevs = 2

源码 #

https://github.com/NVIDIA/cuda-samples/tree/master/Samples/deviceQuery

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mediainfo 静态编译脚本

2019-08-13   |   Linux   |   Linux

因为需要mediainfo支持http协议，在老的版本中是不支持的，所以只能自己动手编译了。

说明 #

系统：ubuntu 14.04 (其他版本可能会有少许改动)

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openssl - https SAN自签名证书

2019-07-02   |   Linux   |   Linux

使用openssl生产自签名证书，用于https测试。

CA根证书制作 #

#1.生成根证书密钥
$ openssl genrsa -out ca.key 4096 #建议长度为4096,1024长度已经被列为不安全。
#2.生成自签名根证书
$ openssl req -new -x509 -days 3650 -key ca.key -out ca.crt #这里在输入CommonName的时候输入名称而不是域名或者ip,就是证书上显示的颁发者，虽然是自签名证书，但是尽量让证书看起来标准一些

使用根证书来签名其它证书 #

1.生成证书密钥 #

$ openssl genrsa -out server.key 4096

2. Subject Alt Name(SAN) #

高版本的Chrome浏览器会要求设置 subjectAltName,如果没有设置SAN会报证书错误

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supervisor 安装和使用方法

2019-05-31   |   Linux   |   Linux

Supervisor是用Python开发的一套通用的进程管理程序，能将一个普通的命令行进程变为后台daemon，并监控进程状态，异常退出时能自动重启。

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yum错误:problem making ssl connection Trying other mirror

2019-02-26   |   Linux   |   Linux

yum无法使用带https的源

环境 #

yum install epel-release

运行以上命令之后，安装其他软件就报错。

错误提示 #

[Errno 14] problem making ssl connection Trying other mirror.
Trying other mirror
Error: Cannot retrieve repository metadata (repomd.xml) for repository: xxxx. Please verify its path and try again

经过google查询，发现似乎是ssl证书的原因。

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CentOS7 php5.6 编译安装amqp扩展

2019-01-22   |   Linux   |   Linux

php 安装最新rabbitmq扩展

1、安装编译环境 #

yum install cmake gcc gcc-c++ make openssl-devel

2、安装rabbitmq-c #

wget https://github.com/alanxz/rabbitmq-c/archive/v0.9.0.zip
unzip v0.9.0.zip
cd rabbitmq-c-0.9.0/
cmake -DCMAKE_INSTALL_PREFIX=/usr/local/rabbitmq-c-0.9.0/
make && make install

3、安装amqp #

wget http://pecl.php.net/get/amqp-1.9.4.tgz
tar zxf amqp-1.9.4.tgz
cd amqp-1.9.4
/usr/bin/phpize
./configure --with-php-config=/usr/bin/php-config --with-amqp --with-librabbitmq-dir=/usr/local/rabbitmq-c-0.9.0

#由于rabbitmq-c编译出来的lib目录是lib64，所以我们要做一些小的修改
vim Makefile
#将 AMQP_SHARED_LIBADD = -Wl,-rpath,/usr/local/rabbitmq-c-0.9.0/lib -L/usr/local/rabbitmq-c-0.9.0/lib -lrabbitmq
#修改为 AMQP_SHARED_LIBADD = -Wl,-rpath,/usr/local/rabbitmq-c-0.9.0/lib64 -L/usr/local/rabbitmq-c-0.9.0/lib64 -lrabbitmq

make && make install

4、php.ini 添加模块 #

vi /usr/local/php/etc/php.ini
#增加
extension = /usr/lib64/php/modules/amqp.so

5、重启服务 #

systemctl restart php-fpm