clsung is reading

2016-08-25

Update salt from 2015.5.3 to 2016.3.2

When reading salt’s source code, it seems we have a ‘source_hash_update’ option on “archive.extracted”, however when I added so, salt complains:

    Warnings: 'source_hash_update', 'group' and 'user' are invalid keyword
              arguments for 'archive.extracted'. If you were trying to pass
              additional data to be used in a template context, please populate
              'context' with 'key: value' pairs. Your approach will work until
              Salt Carbon is out. Please update your state files.

Warnings: 'source_hash_update', 'group' and 'user' are invalid keyword

arguments for 'archive.extracted'. If you were trying to pass

additional data to be used in a template context, please populate

'context' with 'key: value' pairs. Your approach will work until

Salt Carbon is out. Please update your state files.

2016-08-15

Developing with consul on Macbook

For development use, we need to have consul running on localhost. When using a Macbook (Air), we need to specify the “-bind=0.0.0.0” and “-client=0.0.0.0” in order to have programs (tests) access to the consul agent in the container: Read more →

2016-08-03

重整 Exif 資料

多想幾天，可以不用重新發明輪子。 :p
Read more →

2014-08-14

Install docker on Centos 7

Perform a yum search docker, we can see two docker available:

docker.x86_64 : Automates deployment of containerized applications
docker-io.x86_64 : Automates deployment of containerized applications

Well, at least for today, the docker.x86_64, which is mentioned in , is still 0.11. So please install the docker-io.x86_64, which is 1.0.0-1.el7.

Updated 20140829: there’s more up-to-date repo for docker.

Updated 20150111: it seems the repo is out of managed now. And official repo is upgraded to 1.3.2. Thus the official repo is recommended now.

% # just use original one
% # curl -O https://copr.fedoraproject.org/coprs/goldmann/docker-io/repo/epel-7/goldmann-docker-io-epel-7.repo
% # sudo mv goldmann-docker-io-epel-7.repo
% # yum update
% # yum install docker-io
% sudo service docker start
Redirecting to /bin/systemctl start docker.service

2014-08-14

EPEL 7 for Centos 7

To install EPEL-7

% rpm -ivh http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm

1	% rpm -ivh http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm

Also, enable it by default, edit /etc/yum.repos.d/remi.repo and set ‘enable=1’ under section of [remi] and [remi-

2013-11-05

Install GNU gcc 4.8.2 on CentOS 6.4

Install pre-requirements:

 % yum install gmp-devel mpfr-devel  libmpc-devel

1	% yum install gmp-devel mpfr-devel libmpc-devel

Download and extract gcc 4.8.2 source tar ball:

 % curl -O ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.2/gcc-4.8.2.tar.gz; tar zxf gcc-4.8.2.tar.gz

1	% curl -O ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.2/gcc-4.8.2.tar.gz; tar zxf gcc-4.8.2.tar.gz

 % cd gcc-4.8.2; ./configure --enable-languages=c,c++ --disable-multilib

1	% cd gcc-4.8.2; ./configure --enable-languages=c,c++ --disable-multilib

Build and install:

 % make; make install<

2013-10-04

Crop image in golang

In python, for cropping image I use PIL. However the dependencies of PIL is huge, also need to install some lib*-dev packages.

So I choose go to crop images:

Usage:

% go run crop.go large.jpeg thumbna

2013-07-24

Create file with random string in python

#!/usr/bin/env python

import string

import random
out_file = 'text_file.txt'

file_size = 1024 * 1024
rands = lambda x: ''.join(random.choice(string.letters + string.digits) for x in xrange(x))

with open(out_file, 'w') as f:

    f.write(rands(file_size))

2012-03-07

Increase uwsgi_buffer_size to run django-openid-auth on dotCloud

To enable Django OpenID authentication, I choose django-openid-auth. But when I deploy to dotcloud, there’s a ‘404’ as welcome message :p Read more →

2012-03-06

MySQL Connector C++ on Ubuntu 10.04 LTS

I’ve trying to use MySQL Connector C++ for my project, here the example code (retrieved from official site): Read more →

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