Shantanu's Blog

Corporate Consultant

January 14, 2017

 

Import data into mysql using pandas

Here is 6 lines of python code that will import any (excel or csv) data into mysql.

1) Open the excel file and save the data from a single sheet "s3_usage" into a data frame.
2) Copy the dataframe data into MySQL (test database - myreport_tbl table)

!wget https://s3.amazonaws.com/oksoft/pandas_work.xlsx

import pandas as pd
xl = pd.ExcelFile('pandas_work.xlsx')
s3_usage=xl.parse('s3_usage')

import sqlalchemy
engine = sqlalchemy.create_engine('mysql+pymysql://root:passwd@172.31.30.248/test')
s3_usage.to_sql('myreport_tbl', engine, if_exists='replace')
_____

Login to mysql and check if the data is imported correctly.

mysql> select * from myreport_tbl limit 1;
+-------+----------+------------------+--------------------------+----------+---------------------+---------------------+------------+
| index | Service  | Operation        | UsageType                | Resource | StartTime           | EndTime             | UsageValue |
+-------+----------+------------------+--------------------------+----------+---------------------+---------------------+------------+
|     0 | AmazonS3 | ListAllMyBuckets | C3DataTransfer-Out-Bytes | NULL     | 2016-12-01 00:00:00 | 2016-12-01 01:00:00 |       1332 |
+-------+----------+------------------+--------------------------+----------+---------------------+---------------------+------------+
1 row in set (0.00 sec)

mysql> show create table myreport_tbl\G
*************************** 1. row ***************************
       Table: myreport_tbl
Create Table: CREATE TABLE `myreport_tbl` (
  `index` bigint(20) DEFAULT NULL,
  `Service` text,
  `Operation` text,
  `UsageType` text,
  `Resource` text,
  `StartTime` datetime DEFAULT NULL,
  `EndTime` datetime DEFAULT NULL,
  `UsageValue` bigint(20) DEFAULT NULL,
  KEY `ix_myreport_tbl_index` (`index`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

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January 12, 2017

 

Dockerize php application

If you have CodeIgniter based php application, you can easily dockerize it. The docker command will look something like this...

docker run -p 80:80 -e MYHOST=172.31.11.168  -e MYUSER=root -e MYPASS=pass -e MYDB=livedbbox --restart always -d  oksoft/phpapp

We are passing the database and password as environment variable that can be read from the database config file. You need this code in your database.php file.

# vi application/config/database.php

$db['default'] = array(
        'dsn'   => '',
        'hostname' => getenv("MYHOST"),
        'username' => getenv("MYUSER"),
        'password' => getenv("MYPASS"),
        'database' => getenv("MYDB"),


If your application is not able to write session data to a file, then you may need this change as well.

# vi application/config/config.php
# $config['sess_save_path'] = sys_get_temp_dir();

nginx and other config files along with Dockerfile can be found here...

https://github.com/shantanuo/docker-1/tree/master/nginx-php

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December 27, 2016

 

play with docker

play-with-docker is a a Docker playground which gives you the experience of having a free Alpine Linux Virtual Machine in the cloud where you can build and run Docker containers and even create clusters with Docker features like Swarm Mode. Under the hood DIND or Docker-in-Docker is used to give the effect of multiple VMs/PCs.

http://play-with-docker.com/

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December 08, 2016

 

Sub-classing dict

Python's built-in dict class can be subclassed to implement autovivificious dictionaries simply by overriding the __missing__() method

>>> class Tree(dict):
...     def __missing__(self, key):
...         value = self[key] = type(self)()
...         return value

>>> # common names by class, order, genus, and type-species
>>> common_names = Tree()
>>> common_names['Mammalia']['Primates']['Homo']['H. sapiens'] = 'human being'
>>> common_names
{'Mammalia': {'Primates': {'Homo': {'H. sapiens': 'human being'}}}}

https://en.wikipedia.org/wiki/Autovivification#Python

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November 01, 2016

 

sysdig for system admins

What about a tool for sys admin that has all the utilties those we use everyday?
sysdig is a combination of strace + tcpdump + htop + iftop + lsof + transaction tracing

It is an open source system-level exploration tool that captures system state and activity.

Here is how to install it...

curl -s https://s3.amazonaws.com/download.draios.com/stable/install-sysdig | sudo bash

And here are a few examples

Dump system activity to file,
sysdig -w trace.scap

Show all the interactive commands executed inside a given container.
sysdig -pc -c spy_users container.name=wordpress1

View the top network connections for a single container.
sysdig -pc -c topconns container.name=wordpress1

See all the GET HTTP requests made by the machine
sudo sysdig -s 2000 -A -c echo_fds fd.port=80 and evt.buffer contains GET

See all the SQL select queries made by the machine
sudo sysdig -s 2000 -A -c echo_fds evt.buffer contains SELECT

See queries made via apache to an external MySQL server happening in real time
sysdig -s 2000 -A -c echo_fds fd.sip=192.168.30.5 and proc.name=apache2 and evt.buffer contains SELECT

More examples can be found here..

http://www.sysdig.org/wiki/sysdig-examples/#application

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