Develop Reference

How do I connect PyCharm to a remote docker registry?

I have pycharm installed on one server and have docker installed on another server.
I wish to connect PyCHarm to docker on the other server.
I have added the IP address and username and password of the server but the test connection fails.
What exactly do I enter into this configuration screen in PyCharm?
Is there a specific format of address I need to use?

Is the IP address/ address url needs to be a public one as specified here
Also keep in mind - the screen you are trying to put your details into is to add a custom docker registry details and not connect your server to another docker server. If you are trying to add a new custom registry, then great! otherwise you might want to have some ssh tunnelling to connect 2 servers.

Can't subscribe to local mosquitto broker [duplicate]

I have a virtual machine that is supposed to be the host, which can receive and send data. The first picture is the error that I'm getting on my main machine (from which I'm trying to send data from). The second picture is the mosquitto log on my virtual machine. Also I'm using the default config, which as far as I know can't cause these problems, at least from what I have seen from other examples. I have very little understanding on how all of this works, so any help is appreciated.
What I have tried on the host machine:
Disabling Windows defender
Adding firewall rules for "mosquitto.exe"
Installing mosquitto on a linux machine

Starting with the release of Mosquitto version 2.0.0 (you are running v2.0.2) the default config will only bind to localhost as a move to a more secure default posture.
If you want to be able to access the broker from other machines you will need to explicitly edit the config files to either add a new listener that binds to the external IP address (or 0.0.0.0) or add a bind entry for the default listener.
By default it will also only allow anonymous connections (without username/password) from localhost, to allow anonymous from remote add:
allow_anonymous true
More details can be found in the 2.0 release notes here

You have to run with
mosquitto -c mosquitto.conf
mosquitto.conf, which exists in the folder same with execution file exists (C:\Program Files\mosquitto etc.), have to include following line.
listener 1883 ip_address_of_the_machine(192.168.1.1 etc.)

By default, the Mosquitto broker will only accept connections from clients on the local machine (the server hosting the broker).
Therefore, a custom configuration needs to be used with your instance of Mosquitto in order to accept connections from remote clients.
On your Windows machine, run a text editor as administrator and paste the following text:
listener 1883
allow_anonymous true
This creates a listener on port 1883 and allows anonymous connections. By default the number of connections is infinite. Save the file to "C:\Program Files\Mosquitto" using a file name with the ".conf" extension such as "your_conf_file.conf".
Open a terminal window and navigate to the mosquitto directory. Run the following command:
mosquitto -v -c your_conf_file.conf
where
-c : specify the broker config file.
-v : verbose mode - enable all logging types. This overrides
any logging options given in the config file.

I found I had to add, not only bind_address ip_address but also had to set allow_anonymous true before devices could connect successfully to MQTT. Of course I understand that a better option would be to set user and password on each device. But that's a next step after everything actually works in the minimum configuration.

For those who use mosquitto with homebrew on Mac.
Adding these two lines to /opt/homebrew/Cellar/mosquitto/2.0.15/etc/mosquitto/mosquitto.conf fixed my issue.
allow_anonymous true
listener 1883

you can run it with the included 'no-auth' config file like so:
mosquitto -c /mosquitto-no-auth.conf
I had the same problem while running it inside docker container (generated with docker-compose).
In docker-compose.yml file this is done with:
command: mosquitto -c /mosquitto-no-auth.conf

(Pycharm docker setting)Connection refused:no further information

I'm new to Docker. I get a connecting error when trying to setup Docker in PyCharm Professional edition.
I have followed this official manual and turn on the checkbox(Expose daemon on tcp://localhost:2375 without TLS)
But it still not work.
Cannot connect: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.O.O.1:2375
caused by: java.net.ConnectException: Connection refused: no further information
I have accidentally connected docker one time.But when i restart my computer i cannot connect docker anymore.
Any further help would be gratefully appreciated.

If you are facing connection refused then there may be a chance that there is no server to respond to your request.
So first check whether docker server is listening on 2375 port.
netstat -anp tcp | findstr 2375
Or, use tcpview for GUI.
If docker is not listening on this port, then check your C:\ProgramData\Docker\config\daemon.json file and verify whether you have the below Key value pair in your JSON.
"hosts": ["tcp://0.0.0.0:2375"]
If it is not there, then add this and restart your docker daemon.
If you are behind a proxy, then make sure to add this in no-proxy, so that your requests will not be routed via a proxy server.
NOTE: I don't have any experience with docker on windows

Error when connecting to SFTP server using Python Pysftp

I am executing a Python script on my Linux server that uses pysftp to connect to another server in order to read files that are sitting in a directory of that remote server. When I run the script, it fails out while connecting to the remote server and creates a text file with the title: 'This service allows sftp connections only.'
This file is created inside my project directory. Below is the part of my code that is failing:
def sftp_get_file(sftp_host, sftp_username):
with pysftp.Connection(sftp_host, sftp_username) as sftp:
# transfer file from remote to local
sftp.get(remote_file, local_file)
Code is very simple and works when I've tested it using my local server as the remote server. When I tested it in the new environment by actually depending on SFTP, then it failed. Any suggestions? Is pysftp using SSH at some point when it should be using only SFTP?

Turns out the problem was due to me performing sftp.execute('ls') a couple lines down in the script. The server I was remoting onto only supported sftp commands and that command was forbidden.

Can't connect to remote django server port 80

I'm having an issue running and connecting to my python django server on a windows 2012 server. To run the server I use command: python manage.py 0.0.0.0:80. This results in an error below
[Error 10013]: an attempt was made to access a socket in a way forbidden by its access permissions
I've tried running the command prompt as an administrator with no change. For reference, I am able to run the server on port 8000 but then I cannot connect to the port remotely. I have turned off firewalls as well so that is probably not the issue.
While it is preferable to run the django on port 80, I am trying to get this working on any port.

Port 80 (and many other ports) is reserved by Windows Server. Checkout this https://serverfault.com/questions/633179/cant-make-confluence-run-on-port-80-with-windows-server-2012-r2,
You may want to google "Windows Server Reserved port" for more info and a way to "unreserve" it.