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[GCP] Create disk from snapshot of another project

Step 0: create snapshot from desired disk, example name: disk-snapshot-20171026

Posted by clsung on Thursday, October 26, 2017

[docker] Multi-stage builds

Consider the following scenario: you are going to rolling update your cluster, and it turns out your network bandwidth is limited for some reason and size of built docker image is not small enough. What’s worse, every instance of cluster will need to pull the docker image before start-up…

Posted by clsung on Sunday, May 14, 2017

CoreOS remove early-docker since 1284.0.0

It happens the docker daemon wasn’t alive when I login to the console.

Posted by clsung on Tuesday, April 18, 2017

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.

Posted by clsung on Wednesday, August 24, 2016

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:

Posted by clsung on Monday, August 15, 2016

重整 Exif 資料

多想幾天，可以不用重新發明輪子。 :p

Posted by clsung on Wednesday, August 3, 2016

Install docker on Centos 7

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

Posted by clsung on Thursday, August 14, 2014

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

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

Posted by clsung on Thursday, August 14, 2014

Install GNU gcc 4.8.2 on CentOS 6.4

Install pre-requirements:

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

Download and extract gcc 4.8.2 source tar ball:

Posted by clsung on Tuesday, November 5, 2013

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.

Posted by clsung on Friday, October 4, 2013