Shantanu's Blog

Corporate Consultant

July 21, 2016

 

Install and use private docker registry

# On the master server, create a registry container...
docker run -d -p 5000:5000 registry

This command will start a fresh new registry. If you have a registry with all your images built-in then use that like this...

docker run -p 5000:5000 -d shantanuo/myregistry
_____

# On the client server, change the docker config file as shown below and restart docker...
(centOS)
vi /etc/sysconfig/docker
or
vi /etc/init.d/docker

OPTIONS="--insecure-registry 52.205.213.245:5000"

(Ubuntu)
vi /etc/default/docker

DOCKER_OPTS="--insecure-registry 52.205.213.245:5000"

# Now download an image from docker hub and upload it to private repository...
docker pull django
docker pull rabbitmq:3-management
docker pull mongo:3.3.9
docker pull phusion/passenger-full
docker pull continuumio/miniconda

docker tag django 52.205.213.245:5000/shantanuo/mydjango
docker tag rabbitmq:3-management 52.205.213.245:5000/shantanuo/myrabbit
docker tag mongo:3.3.9 52.205.213.245:5000/shantanuo/mymongo
docker tag phusion/passenger-full 52.205.213.245:5000/shantanuo/mypassenger
docker tag continuumio/miniconda 52.205.213.245:5000/shantanuo/myminiconda

docker push 52.205.213.245:5000/shantanuo/mydjango
docker push 52.205.213.245:5000/shantanuo/myrabbit
docker push 52.205.213.245:5000/shantanuo/mymongo
docker push 52.205.213.245:5000/shantanuo/mypassenger
docker push 52.205.213.245:5000/shantanuo/myminiconda

# check if all the images are uploaded correctly
docker search 52.205.213.245:5000/
OR
docker search localhost:5000/
_____

# backup your private registry so that you can restore it in case of master server crash

docker commit 126781fc1667 shantanuo/myregistry

docker push shantanuo/myregistry
_____

Download and run the private registry image from docker hub

docker run -p 5000:5000 -d shantanuo/myregistry

docker search localhost:5000/
NAME                    DESCRIPTION   STARS     OFFICIAL   AUTOMATED
openshift/busybox                     0
shantanuo/pyrun                       0
shantanuo/mydjango                    0
shantanuo/myrabbit                    0
shantanuo/mymongo                     0
shantanuo/mypassenger                 0
shantanuo/myminiconda                 0
_____

Here is how to download and start a container from private registry...

From docker hub:

docker run --hostname oksoft -p 15672:15672  -d rabbitmq:3-management

From private registry:

docker run --hostname oksoft -p 15672:15672  -d ec2-54-164-0-64.compute-1.amazonaws.com:5000/shantanuo/myrabbit

Labels:


 

Install docker on Ubuntu Trusty 14.04

Steps to install docker on Ubuntu Trusty

sudo apt-get update

sudo apt-get install apt-transport-https ca-certificates

sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

vi /etc/apt/sources.list.d/docker.list

deb https://apt.dockerproject.org/repo ubuntu-trusty main
_____

sudo apt-get update

sudo apt-get purge lxc-docker

apt-cache policy docker-engine

sudo apt-get update

sudo apt-get install linux-image-extra-$(uname -r)

sudo apt-get install apparmor

sudo apt-get update

sudo apt-get install docker-engine

sudo service docker start

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July 12, 2016

 

tokuDB (mongo) using docker

Here is the command that will initiate a toku container.

docker run -d -p 27017:27017 -v /tokudata:/data/db ankurcha/tokumx

(or use official image "mongo" instead of ankurcha/tokumx to install mongoDB without toku engine)
Now this toku installation is available through port 27017 from host IP that may be 172.17.0.1 and you can find it using ifconfig command.

The following python code will connect to the toku mongo container and add a record.

from pymongo import MongoClient
client = MongoClient('172.17.0.1:27017')
db = client.myFirstMB
db.countries.insert_one({"name" : "USA"})
for i in db.countries.find():
    print i

Since we have linked the data directory to /tokudata folder of the host machine, the data can be easily backed up.

Labels: ,


June 30, 2016

 

list of useful containers

Here is a list of some of the containers those I use frequently. Here is how to install docker
First make sure that you are a root user. And there is enough disk space available.

# install docker
yum install -y docker

# start docker
vi /etc/sysconfig/docker-storage

DOCKER_STORAGE_OPTIONS="--storage-opt dm.basesize=200G"

/etc/init.d/docker start

# Install docker-compose
curl -L https://github.com/docker/compose/releases/download/1.7.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

Editing storage options above will allow bigger containers (upto 200 GB) to be loaded. The container may get out of space once you start saving data into it.

Node.js

In order to use node application within docker environment, you can use the official node image that can be found here...

https://hub.docker.com/r/library/node/

Change to the directory where you have already written code and add the dockerfile with these 2 lines...

$ vi Dockerfile
FROM node:4-onbuild
EXPOSE 8888

Once your script is ready, you need to build an image...

$ docker build -t shantanuo/my-nodejs-app .

And run the node application...

$ docker run -p 8888:8888 -d shantanuo/my-nodejs-app
_____

You can push this image to docker hub as a private or public repository.

docker login
username:shantanuo
password:XXXX

docker push shantanuo/my-nodejs-app

MySQL

ofifical mysql repository

mkdir -p /storage/test-mysql/datadir
docker run -d -p 3306:3306  -e MYSQL_ALLOW_EMPTY_PASSWORD=yes  -v /my/custom:/etc/mysql/conf.d  -v /storage/test-mysql/datadir:/var/lib/mysql   -v /my/custom:/etc/mysql/conf.d  mysql:5.6

(size: 100MB)
Just by changing the name to test-mysql2 we can set up another mysql container. Instead of mysql official version, we can use tutum/mysql which has customized installation.

fixed the bug in the official mysql image

https://github.com/shantanuo/mysql

Percona with tokuDB

docker run -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -e INIT_TOKUDB=1 -d percona/percona-server

log in to the container and run this command to enable tokudb if "show engines" command does not show tokudb.

ps_tokudb_admin --enable

Backup
# backup of mysql hosted in the folder /storage of another container named mysql-server

docker run -it \
--link mysql-server:mysql \
-v /storage/mysql-server/datadir:/var/lib/mysql \
-v /storage/backups:/backups \
--rm=true \
severalnines/mysql-pxb \
sh -c 'exec /run_backup.sh'

# backup of mysql from hosted machine

docker run -it \
-v /var/lib/mysql:/var/lib/mysql \
-v /storage/backups:/backups \
--rm=true \
severalnines/mysql-pxb \
sh -c 'exec innobackupex --host="$hostname" --port="3306" --user=root --password="$rootpassword" /backups'

Utilities

# cluster control container:
docker run -d --name clustercontrol -p 5000:80 severalnines/clustercontrol

elastic

1) official container

Here are 2 commands to start Elasticsearch with Kibana using docker.

# docker run -d -p 9200:9200 -p 9300:9300 -e ES_HEAP_SIZE=10g elasticsearch

Find the name of the container and link it to kibana by changing kibana_name_here below like this...

# docker run -d -p 5601:5601 --link   kibana_name_here:elasticsearch -e ELASTICSEARCH_URL=http://elasticsearch:9200 kibana
_____

Login to the newly created elastic container and install plug-ins
docker exec -it container_id bash

# pwd
/usr/share/elasticsearch

# bin/plugin install analysis-phonetic

Once the plugin is installed, restart the container so that elastic service will be restarted....
# docker restart c44004a47f46

2) custom container

elastic - customize elasticsearch installation and maintenance

adminer

adminer is the web interface to connect to any database like postgresql, mysql or oracle
Instead of linking adminer on any port, use --net=host to use the default port 80 of host machine. It will also use default mysql port 3306 that is fortunately linked to mysql container as shown above.

If you do not want to add one more parameter i.e. --net then use the default "bridge" network protocol. You will need to use the following command to find the IP address of the docker host.

# ip addr show docker0

This command will show the docker host IP address on the docker0 network interface.

download

wget http://www.adminer.org/latest.php -O /tmp/index.php

connect to any database like mysql, pgsql, redshift, oracle or mongoDB

postgresql (redshift) or mysql

docker run -it -p 8060:80 -v /tmp/:/var/www/html/ shantanuo/phpadminer

mongoDB

docker run -d -p 8070:80 -v /tmp:/var/www/html ishiidaichi/apache-php-mongo-phalcon

oracle

docker run -d -p 8080:80 -v /tmp/:/app lukaszkinder/apache-php-oci8-pdo_oci

# not sure about how to support mssql

python

compact packages

1) pyrun
python versions 2 and 3 compact, without any external libraries, for basic testing like this...
here is an easy way to convince people to upgrade to python 3.0+

# docker run -it --rm shantanuo/pyrun:2.7 python
>>> 3/2
1

# docker run -it --rm shantanuo/pyrun:3.4 python
>>> 3/2
1.5

Python 2.7 version returns absolute value 1 while 3.4 version correctly returns 1.5

2) staticpython 
4 MB single file python package!

3) socket 
 python with application files

Complete python package

4) conda official 
Official python installation:

https://github.com/ContinuumIO/docker-images

5) miniconda customized
Here is an impage with pandas and sqldf modules

# Start ipython container that is based on miniconda image in a screen session
docker run -p 7778:7778 -t shantanuo/miniconda_ipython_sqldf /bin/bash

# better start with environment variables
docker run -p 7778:7778 \
-e DEV_ACCESS_KEY=XXX -e DEV_SECRET_KEY=YYY \
-e PROD_READONLY_ACCESS_KEY=XXX -e PROD_READONLY_SECRET_KEY=YYY \
-e PROD_READWRITE_ACCESS_KEY=XXX -e PROD_READWRITE_SECRET_KEY=YYY \
-t shantanuo/miniconda_ipython_sqldf /bin/bash

# Log-in to newly created container
docker exec -it $(docker ps -l -q) /bin/bash

# Start ipython notebook on port 7778 that can be accessed from anywhere (*)
cd /home/
ipython notebook --ip=* --port=7778

# and use the environment keys in your code like this...
import boto3
import os
s3 = boto3.client('s3',aws_access_key_id=os.environ['DEV_ACCESS_KEY'], aws_secret_access_key=os.environ['DEV_SECRET_KEY'])

application containers

Here is an example from amazon about how to build your own container with php application.

https://github.com/awslabs/ecs-demo-php-simple-app

Utility containers

1) myscan 

Use OCR to read any image.
alias pancard='docker run -i --rm -v "$(pwd)":/home/ shantanuo/myscan python /scan.py "$@"'

wget https://raw.githubusercontent.com/dilippuri/PAN-Card-OCR/master/testcases/1crop.jpg

pancard 1crop.jpg

2) panamapapers 

container with sqlite database ready for query

3) newrelic
newrelic docker image that works like nagios

docker run -d \
--privileged=true --name nrsysmond \
--pid=host \
--net=host \
-v /sys:/sys \
-v /dev:/dev \
-v /var/run/docker.sock:/var/run/docker.sock \
-v /var/log:/var/log:rw \
-e NRSYSMOND_license_key=186b2a8d6af29107609abca749296b46cda9fa69 \
-e NRSYSMOND_logfile=/var/log/nrsysmond.log \
newrelic/nrsysmond:latest

docker run -d \
  -e NEW_RELIC_LICENSE_KEY=186b2a8d6af29107609abca749296b46cda9fa69  \
  -e AGENT_HOST=52.1.174.168 \
  -e AGENT_USER=root \
  -e AGENT_PASSWD=XXXXX \
  newrelic/mysql-plugin

4) OCS inventory
docker run -d -p 80:80 -p 3301:3306 zanhsieh/docker-ocs-inventory-ng

http://52.86.68.170/ocsreports/
(username:admin, password:admin)

5) selenium
simulate a browser (crome) with selenium pre-installed

docker run -d -v /dev/shm:/dev/shm -p 4444:4444 selenium/standalone-chrome

The Hub url...
http://52.205.135.220:4444/wd/hub/


6) Deploying registry server
#Start your registry:
docker run -d -p 5000:5000 --restart=always --name registry registry:2

#You can now use it with docker. Tag any image to point to your registry:
docker tag image_name localhost:5000/image_name

#then push it to your registry:
docker push localhost:5000/image_name

# pull it back from your registry:
docker pull localhost:5000/image_name

# push the registry container to hub
docker stop registry
docker commit registry
docker push registry

7) Docker User Interface
docker run -d -p 9000:9000 -v /var/run/docker.sock:/docker.sock --name dockerui abh1nav/dockerui:latest -e="/docker.sock"

8) docker clean up container
docker run -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker:/var/lib/docker --rm martin/docker-cleanup-volumes --dry-run

9) prometheus monitoring
check port 9090 and cadvisor on 8080

git clone https://github.com/vegasbrianc/prometheus.git
cd prometheus/

/usr/local/bin/docker-compose  up -d

10) open refine utility
# docker run --privileged -v /openrefine_projects/:/mnt/refine -p 35181:3333 -d psychemedia/ou-tm351-openrefine
Or use this:
docker run -p 3334:3333 -v /mnt/refine -d psychemedia/docker-openrefine

11) Freeswitch
docker run -d sous/freeswitch

12) mongodb
from tutum
docker run -d -p 27017:27017 -p 28017:28017 -e MONGODB_PASS="mypass" tutum/mongodb

offical image with wiredTiger engine
docker run -p 27017:27017 -v /tokudata:/data/db -d mongo --storageEngine wiredTiger

with tokumx compression engine
docker run -p 27017:27017 -v /tokudata:/data/db -d ankurcha/tokumx

13) Consul Monitor
docker run -d --name=consul --net=host gliderlabs/consul-server -bootstrap -advertise=52.200.204.48

14) Registrator container
$ docker run -d \
--name=registrator \
--net=host \
--volume=/var/run/docker.sock:/tmp/docker.sock \
gliderlabs/registrator:latest \
consul://localhost:8500

15) wordpress
docker has official wordpress containers

16) Packetbeat container
docker run -d --restart=always --net=host shantanuo/packetbeat-agent

17) Django

docker run --name some-django-app -v "$PWD":/usr/src/app -w /usr/src/app -p 8000:8000  -e location=mumbai -d django bash -c "pip install -r requirements.txt && python manage.py runserver 0.0.0.0:8000"

18) rabbitmq
docker run -d --hostname oksoft -p 8080:15672 rabbitmq:3-management

19) ruby and passenger
(official docker image from phusion)

docker run -d -p 3000:3000 phusion/passenger-full

# login to your container:
docker exec -it container_id bash

# change to opt directory
cd /opt/
mkdir public

# a test file
curl google.com > public/index.html

# start passenger:
passenger start

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Backup mysql using a container!

Suppose you have a MySQL container running named "mysql-server", started with this command:

$ docker run -d \
--name=mysql-server \
-v /storage/mysql-server/datadir:/var/lib/mysql \
-e MySQL_ROOT_PASSWORD=mypassword \
mysql

Then, to perform backup against the above container, the command would be:

$ docker run -it \
--link mysql-server:mysql \
-v /storage/mysql-server/datadir:/var/lib/mysql \
-v /storage/backups:/backups \
--rm=true \
severalnines/mysql-pxb \
sh -c 'exec /run_backup.sh'

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