def run_nginx_check():
global instance
if running_check():
try:
dns = instance.public_dns_name
(status, output) = ssh.connect(dns, private_key_name, "sudo python3 check_webserver.py")
if "command not found" in output:
print("It doesn't look like you've installed python, please try that first.")
elif "No such file" in output:
print("It doesn't look like you've copied the file to the instance, please try that first.")
else:
print(output)
if status > 0:
choice = input("Would you like to start nginx? (y/n) ")
if choice == "y":
(stat, out) = ssh.connect(dns, private_key_name, "sudo service nginx start")
if "unrecognized service" in out:
print("It doesn't look like you've installed nginx, please try that first.")
run_nginx_check()
else:
print("Nginx not started.")
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("run_nginx_check method failed. Error: " + error)
def new_instance():
global instance
print("Please enter the name you would like to call the instance,")
print("leave blank for the default.")
instance_name = input(">>> ")
if instance_name == "":
instance_name = "GA_StephenCoady"
print("Starting instance. This may take a moment.")
try:
# creates a temporary reservation to create an instance from
reservation = conn.run_instances(
"ami-69b9941e", key_name=private_key_name, instance_type="t2.micro", security_groups=["witsshrdp"]
)
instance = reservation.instances[0]
instance.add_tag("Name", instance_name)
instance.update()
while instance.state != "running":
time.sleep(2)
instance.update()
print("\nRunning!")
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("new_server method failed. Error: " + error)
def visit_website():
global instance
if running_check():
try:
dns = instance.public_dns_name
webbrowser.open("http://" + dns, new=0, autoraise=True)
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("visit_website method failed. Error: " + error)
def view_error_log():
global instance
if running_check():
try:
dns = instance.public_dns_name
ssh.connect(dns, private_key_name, "sudo chmod 777 /var/log/nginx")
cmd = "nano /var/log/nginx/error.log"
command = "ssh -t -o StrictHostKeyChecking=no -i " + private_key_name + ".pem ec2-user@" + dns + " " + cmd
print(os.system(command))
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("view_error_log method failed. Error: " + error)
def start_instance():
global instance
try:
if instance.state == "terminated":
print("Sorry, this instance is terminated. RIP.")
else:
if instance.state == "running":
print("Instance already running!")
logger.status_log("User tried to start an instance already running")
else:
instance.start()
print("Instance started!")
except Exception as e:
error = str(e)
print("Cannot start instance, something went wrong. Please try again.")
logger.status_log("Error starting instance. Error: " + error)
def terminate_instance():
global instance
try:
if instance.state == "terminated":
print("Instance already terminated!")
logger.status_log("User tried to stop an instance already terminated")
else:
decision = input("Are you sure you wish to terminate this instance? (y/n) ")
if decision == "y":
instance.terminate()
print("Instance terminated!")
else:
print("Termination aborted! Instance is safe...for now.")
except Exception as e:
error = str(e)
print("Cannot terminate instance, something went wrong. Please try again.")
logger.status_log("Error terminating instance. Error: " + error)
def install_python():
global instance
if running_check():
try:
dns = instance.public_dns_name
(status, output) = ssh.connect(dns, private_key_name, "sudo yum -y install python34")
if status == 0:
print("Python installed successfully!")
else:
logger.status_log("Python not installed correctly.")
try_again = input("Oops, something wen't wrong installing python. Try again? (y/n) ")
if try_again == "y":
install_python()
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("install_python method failed. Error: " + error)
def view_all_instances():
global my_instances
try:
# loops through all reservations associated with this connection
# and forms a list of instances
reservations = conn.get_all_instances()
instances = []
for r in reservations:
instances.extend(r.instances)
# within these instances if the key name matches the user entered
# key it adds it to my_instances[]
my_instances = []
for x in instances:
if x.key_name == private_key_name:
my_instances.append(x)
if len(my_instances) == 0:
print("No instances associated with this key. Please ensure it is the")
print("correct key and that you have created some instances first.")
else:
print()
print("No Name Status Time Started")
print("---------------------------------------")
for i in range(0, len(my_instances)):
print(
str(i)
+ ": "
+ my_instances[i].tags["Name"]
+ " "
+ my_instances[i].state
+ " "
+ my_instances[i].launch_time
)
print("\n")
instance_choice = input("Please enter the number of the instance you wish to manage (x to cancel) >>> ")
return instance_choice
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("view_all_instances method failed. Error: " + error)
def copy_web_script():
global instance
if running_check():
try:
print("Copying script...")
dns = instance.public_dns_name
(status, output) = ssh.copy(dns, private_key_name, "check_webserver.py", "")
if status > 0:
logger.status_log("Can't connect using ssh. Error message: ")
logger.status_log(output)
print("Something isn't quite right. Please try again.")
return
else:
(status, output) = ssh.connect(dns, private_key_name, "ls")
print("Current directory: ")
print(output)
(status, output) = ssh.connect(dns, private_key_name, "chmod 700 check_webserver.py")
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("copy_web_script method failed. Error: " + error)
def run_user_command():
global instance
if running_check():
try:
dns = instance.public_dns_name
command = None
print("\nPlease use x to exit the python terminal. ")
print("Please enter the command you wish to run, don't forget to")
print("include -y to accept changes if necessary.")
sudo = input("Would you like to emulate the terminal? (y/n) >>> ")
while command != "x":
command = input(">>> ")
if command != "x":
if sudo == "y":
cmd = (
"ssh -t -o StrictHostKeyChecking=no -i "
+ private_key_name
+ ".pem ec2-user@"
+ dns
+ " "
+ command
)
print(os.system(cmd))
else:
cmd = (
"ssh -o StrictHostKeyChecking=no -i "
+ private_key_name
+ ".pem ec2-user@"
+ dns
+ " "
+ command
)
print(os.system(cmd))
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("run_user_command method failed. Error: " + error)
def running_check():
global instance
if instance == None:
print("No instance selected!")
logger.status_log("No instance selected.")
try:
instance.update()
if instance.state == "running":
return True
else:
print("Instance not running yet, please make sure it is running and then try again.")
logger.status_log("User tried to access non-running instance.")
return False
except Exception as e:
error = str(e)
logger.status_log("running_check method failed. Error: " + error)
def install_nginx():
global instance
if running_check():
try:
print("Installing nginx...")
dns = instance.public_dns_name
(status, output) = ssh.connect(dns, private_key_name, "sudo yum -y install nginx")
if status > 0:
print("Something went wrong. Check error log for information.")
logger.status_log("Can't install nginx using SSH. Error message: ")
logger.status_log(output)
else:
print("Nginx successfully installed on instance.")
except Exception as e:
error = str(e)
print("Something went wrong. Please try again.")
logger.status_log("install_nginx method failed. Error: " + error)
def main():
menu.start_menu()
global private_key_name
print("Please enter key name, or leave blank for the default (stephencoady)")
private_key_name = input(" >>> ")
if private_key_name == "":
private_key_name = "stephencoady"
decision = None
# this while loop controls the "Main Menu"
while decision != "0":
menu.main_menu()
decision = input("Please enter your choice >>> ")
if decision == "1":
new_instance()
if decision == "2":
print("Gathering information about your instances, please wait.")
instance_choice = view_all_instances()
global my_instances
global instance
if instance_choice != "x":
submenu = None
try:
instance = my_instances[int(instance_choice)]
except Exception as e:
error = str(e)
print("Please choose an instance from the list!")
logger.status_log(error)
submenu = "0"
# this while loop controls the "Instance Manager" menu
while submenu != "0":
menu.instance_manager()
submenu = input("Please enter your choice >>> ")
if submenu == "1":
start_instance()
if submenu == "2":
stop_instance()
if submenu == "3":
terminate_instance()
if submenu == "4":
install_python()
if submenu == "6":
run_user_command()
if submenu == "5":
# This while loop cntrols the "Nginx Manager" menu
nginx_choice = None
while nginx_choice != "0":
menu.nginx_manager()
nginx_choice = input("Please enter your choice >>> ")
if nginx_choice == "1":
install_nginx()
if nginx_choice == "2":
copy_web_script()
if nginx_choice == "3":
run_nginx_check()
if nginx_choice == "4":
visit_website()
if nginx_choice == "5":
view_access_log()
if nginx_choice == "6":
view_error_log()
print("\nExiting! Goodbye!")