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dk-helper.py
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dk-helper.py
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import subprocess,os
from tabulate import tabulate
import re
from termcolor import colored
class Simplified:
def __init__(self):
self.option_fn = dict()
self.def_port = ''
# First step in a build-process is writing the docker file.
def create_dockerfile(self, lang,image,path,req_dependencies, setup_command, cmd):
######### Writing docker file ############
f = open(path + "/Dockerfile", "w")
#Specifying base IMAGE name according to the LANGUAGE used.
f.write('FROM ' + image + '\n')
#Specifying required dependencies of the application (Example: g++ for node.js, make for node.js)
if req_dependencies != '':
f.write('RUN '+ req_dependencies + '\n')
#Specifying WORK directory so that docker uses this PATH as default location for subsequent COMMANDS.
f.write('WORKDIR /' + path + '\n')
#Instructs docker to copy ALL contents of application folder to WORK directory.
f.write('COPY . .\n')
#Specify command to import specific dependencies of project (Example: YARN for node.js, PIP for python3 projects.)
f.write('RUN ' + setup_command + '\n')
#f.write('RUN yarn install --production\n')
#Specify the LAUNCH command that needs to run LAST. (Example: node example.js or python3 -m flask run)
final_cmd = 'CMD ['
for c in cmd:
final_cmd = final_cmd + '"' + c + '", '
final_cmd = final_cmd[:len(final_cmd)-2] + ']'
f.write(final_cmd)
f.close()
# BUILD IMAGE: Take required inputs from USER to carry out docker build
def build_new(self):
#Currently supported frameworks: Node.js web app and python web-app using FLASK
langs = ["Node.js","Python-flask"]
table = []
for i,lang in enumerate(langs):
row = [str(i), lang]
table.append(row)
#tabulate: Beautifying user-driven options menu
print(tabulate(table,headers=["Code","Language"]))
#Take input for the LANGUAGE used in the project
ip = input('Please provide the code for the language used for your project: ')
#Take input for the SOURCE-PATH of the project-folder
path = input("Please provide folder name of the application: ")
if ip == '0':
#Docker images can be inherited from base-images (just like INHERITANCE in OOP)
#specifying base image so that we do not need to implement all functionalities needed in a NODE app.
image = 'node:12-alpine'
#node apps need python, g++ and make tool to be pre-installed.
req_dependencies = 'apk add --no-cache python g++ make'
#Use YARN or NPM to install all dependencies in package.json
setup_command = 'yarn install --production'
#Node.js needs the source JS file to launch application
src = input("Please enter the path of your launch file: ")
cmd = 'node ' + src
elif ip == '1':
image = 'python:3.8-slim-buster'
req_dependencies = ''
setup_command = 'pip3 install flask'
cmd = 'python3 -m flask run --host=0.0.0.0 --port=3000'
else:
print(colored('Invalid input. ','red'))
return
cnf = input('Please confirm the launch command: ' + colored(cmd,'green') + '\n' +'Press 1 to confirm, 0 to enter manually: ')
if cnf == '0':
cmd = input("Enter command: ")
cmd = cmd.split()
elif cnf == '1':
cmd = cmd.split()
else:
print('Invalid')
return
self.create_dockerfile(lang,image,path,req_dependencies, setup_command, cmd)
return self.build(True, path)
def build(self, new = False, path = None):
if new:
pref_image_name = input("Please enter your preferred image name(-1 to go back): ")
if pref_image_name == '-1':
self.clear()
return
else:
image_names = self.display_images()
img_num = input("Please input the image number to build(-1 to go back): ")
if img_num == '-1':
self.clear()
return
pref_image_name = image_names[int(img_num)]
path = input('Enter folder name of app: ')
build_success = subprocess.run(["docker","build","-t",pref_image_name,"."],cwd=path + '/')
if build_success.returncode == 0:
print(colored("\n########## Build Success #########",'green'))
return pref_image_name
else:
print(colored("\n########## Build Failed #########",'red'))
return '-1'
def run(self, img=None):
port = "3000"
if img == None:
image_names = self.display_images()
img_num = input("Please input the image number to run(-1 to go back): ")
if img_num == '-1':
self.clear()
return
pref_image_name = image_names[int(img_num)]
else:
pref_image_name = img
ip = '1'
while(ip == '1'):
run_success = subprocess.run(["docker", "run", "-dp", port+':3000', pref_image_name],text=True,stderr=subprocess.PIPE)
print(run_success.stderr)
if run_success.returncode==0:
print(colored("########## Run Success #########",'green'),"PORT: "+port)
return port
elif "port is already allocated" in run_success.stderr:
port = input(colored("Port is already allocated",'red') + 'please enter a new port(-1 to go back): ')
if ip == '-1':
return '-1'
else:
print(colored("########## Run Failed #########",'red'),"PORT: "+port)
return '-1'
return '-1'
def launch(self, port = None):
if port == None:
image_names = self.display_running_containers()
selection = int(input("Please input the code to launch(-1 to go back): "))
if selection == -1:
self.clear()
return
port = image_names[selection][2]
port = port.split(':')[1].split('-')[0]
launch_success = subprocess.run(["open", "-a", "Google Chrome", "http://localhost:"+port],text=True)
if launch_success.returncode==0:
print (colored("\n########## Launch Success #########","green"))
else:
print(colored("\n########## Launch Failed #########",'red'))
def display_running_containers(self):
images = subprocess.run(["docker","ps"],stdout=subprocess.PIPE, text = True)
images = images.stdout.splitlines()
image_names = []
port = ''
for lines in images[1:]:
for word in lines.split():
if word.endswith('tcp'):
port = word
row = [lines.split()[0],lines.split()[1],port]
image_names.append(row)
table = []
########## LIST ALL RUNNING CONTAINERS #############
for i,img in enumerate(image_names):
row = [str(i), img[0], img[1], img[2]]
table.append(row)
print(tabulate(table,headers=["Code","Container ID", "Image Names", "Port"]))
print('\n\n\n')
return image_names
def display_images(self):
images = subprocess.run(["docker","image", "ls"],stdout=subprocess.PIPE, text = True)
images = images.stdout.splitlines()
image_names = []
for lines in images[1:]:
image_names.append(lines.split()[0])
table = []
########## LIST ALL IMAGES #############
for i,img in enumerate(image_names):
row = [str(i), img]
table.append(row)
#print(i, img, sep = ': ')
print(tabulate(table,headers=["Code","Image Names"]))
print('\n\n\n')
return image_names
def scan(self):
image_names = self.display_images()
img_num = input("Please input the image number to scan(-1 to go back): ")
if img_num == '-1':
self.clear()
return
img_to_scan = image_names[int(img_num)]
subprocess.run(["docker","scan",img_to_scan])
def exit(self):
ip = input('Are you sure you want to exit?(Y/N): ')
if ip=='Y':
exit()
def display_options(self):
options = [colored("Exit",'red'),colored("Build new app",'green'),colored("Re-build app","green"),colored("Run existing app","green"), colored("Stop and remove app",'red'),colored("Launch app","green"), colored("Scan vulnerabilities",'red'), colored("Display running containers","green"), colored("Display available images","green"), "Clear console", colored("Build-Run and Launch","green")]
self.option_fn = {'0':self.exit,'1':self.build_new,'2':self.build,'3':self.run,'4':self.stop_container,'5':self.launch,'6':self.scan, '7':self.display_running_containers, '8':self.display_images, '9':self.clear, '10':self.build_run_launch}
table = []
for i,option in enumerate(options):
#print(i, option, sep="|\t")
row = [str(i),option]
table.append(row)
print(tabulate(table,headers=["Code", "Options"]))
def stop_container(self):
image_names = self.display_running_containers()
selection = int(input("Enter container number to stop(-1 to go back): "))
if selection == -1:
self.clear()
return
stop_success = subprocess.run(["docker","rm","-f",image_names[selection][0]])
if stop_success.returncode == 0:
print(colored("############# Stop Success ##############", 'red'))
else:
print(colored("\n########## Stop Failed #########",'red'))
def clear(self):
subprocess.run(["clear"])
self.welcome()
def welcome(self):
print(colored("##################################################################################","blue"))
print('\t\t',colored("Welcome to"),colored("Docker Simplified","green"))
print(colored("##################################################################################","blue"))
def build_run_launch(self):
img = self.build_new()
if img == '-1':
print(colored("Build Failed","red"))
return
port = self.run(img)
if port == -1:
print(colored("Run Failed","red"))
return
x = input("Want to launch(Y/N): ")
if x == 'Y':
self.launch(port)
user = Simplified()
user.welcome()
selection = 1
while True:
user.display_options()
selection = input("Enter code: ")
fn = user.option_fn.get(selection,0)
if fn == 0:
print("Invalid input\nRetry\n")
else:
fn()