In Debian based OSes if you want to install Postman you need to download the binary package and run it everytime you need. But there is a better way for it that you can access Postman system wide. There is
gist in github for it:
- https://gist.github.com/SanderTheDragon/1331397932abaa1d6fbbf63baed5f043

Download shell and run it! (Be careful and read any shell script before running it, I've read it myself)

Now you can add it to favorites and have instant access to it.

Spread your love for m2sh :)))

#postman #debian #ubuntu #shell #gist #github

What is the difference between following 2 try excepts?

try:
   pass
except:
   pass

And:

try:
   pass
except Exception:
   pass

Read about it here:
- https://stackoverflow.com/questions/18982610/difference-between-except-and-except-exception-as-e-in-python

#python #try #except

Enable workmode in Telegram:

open settings in telegram desktop and without clicking anywhere type workmode a dialog will open to confirm that want it to be enabled. After telegram restart you willl have a new bar above chat accounts -> Hide muted chats click on it to hide muted chats from the left pane.

Spread your love for m2sh :)

#telegram #trick #fun #workmode #work_mode

https://stackoverflow.com/questions/13032409/ssh-remote-variable-assignment

#linux #sysadmin #ssh #local_variable #variable_expansion #bashrc #export

In order to enable bash completion in Kubernetes you can usee the below command in linux bash:

source <(kubectl completion bash)

Now to test this enter the below command and you should see the completion:

kubectl cl<TAB>

It should be expanded to kubectl cluster-info.


#linux #bash #shell #kubernetes #kubectl

EMQ X broker is a fully open source, highly scalable, highly available distributed MQTT messaging broker for IoT, M2M and Mobile applications that can handle tens of millions of concurrent clients.

Starting from 3.0 release, EMQ X broker fully supports MQTT V5.0 protocol specifications and backward compatible with MQTT V3.1 and V3.1.1, as well as other communication protocols such as MQTT-SN, CoAP, LwM2M, WebSocket and STOMP. The 3.0 release of the EMQ X broker can scaled to 10+ million concurrent MQTT connections on one cluster.

https://github.com/emqx/emqx

#github #emqx #mqtt #pubsub #wss #ws #websocket #web_socket

tuples vs list from a different point of view. Tuples of constants can be precomputed by Python's peephole optimizer or AST-optimizer. Lists, on the other hand, get built-up from scratch:

>>> from dis import dis 

>>> dis(compile("(10, 'abc')", '', 'eval'))
  1           0 LOAD_CONST               2 ((10, 'abc'))
              3 RETURN_VALUE   

>>> dis(compile("[10, 'abc']", '', 'eval'))
  1           0 LOAD_CONST               0 (10)
              3 LOAD_CONST               1 ('abc')
              6 BUILD_LIST               2
              9 RETURN_VALUE 

#python #list #tuple #performance #dis #compile #ast_optimizer

Caddy is the HTTP/2 web server with automatic HTTPS. I wanted to proxy pass websocket service using Caddy but it didn't work:

wss.example.org {
    proxy / myservice:8083 {
        header_upstream Host {host}
        header_upstream X-Real-IP {remote}
    }
    tls myemail@gmail.com
}

In the documentation it is mentioned that proxy can proxy pass web sockets too. The problem was about not using websocket inside of the proxy stanza, so we solved it using:

wss.example.org {
    proxy / myservice:8083 { 
        header_upstream Host {host}
        header_upstream X-Real-IP {remote}
        websocket
    }
    tls myemail@gmail.com
}

#webserver #caddy #proxy #proxy_pass #wss #ws #websocket

From Discover on Google https://nickjanetakis.com/blog/15-useful-flask-extensions-and-libraries-that-i-use-in-every-project

Online webhook service:
- https://webhook.site

#webhook #site

https://hackernoon.com/python-3-7s-new-builtin-breakpoint-a-quick-tour-4f1aebc444c

#python #python37 #breakpoint #pdb #set_trace

https://realpython.com/python-data-classes/

#python #python37 #data_classes #dataclasses

For prometheus you can use an alert manager, it has a docker file in the link below:
- https://hub.docker.com/r/prom/alertmanager

Awesome Prometheus alerts:
- https://github.com/samber/awesome-prometheus-alerts

alertmanager has rules, you can see sample rules here in the following link:
- https://awesome-prometheus-alerts.grep.to/rules

So to add alertmanager service:

alertmanager:
    image: prom/alertmanager:latest
    restart: always
    command: --config.file=/etc/alertmanager/alertmanager.yml
    volumes:
      - ./alert/config/alertmanager.yml:/etc/alertmanager/alertmanager.yml
    dns:
      - 8.8.8.8

You alert manager configuration may look something like below:

global:
  resolve_timeout: 5m

route:
  # When a new group of alerts is created by an incoming alert, wait at
  # least 'group_wait' to send the initial notification.
  # This way ensures that you get multiple alerts for the same group that start
  # firing shortly after another are batched together on the first
  # notification.
  group_wait: 10s

  # When the first notification was sent, wait 'group_interval' to send a betch
  # of new alerts that started firing for that group.
  group_interval: 5m

  # If an alert has successfully been sent, wait 'repeat_interval' to
  # resend them.
  repeat_interval: 30m

  # A default receiver
  receiver: "slack"

  # All the above attributes are inherited by all child routes and can
  # overwritten on each.
  routes:
    - receiver: "slack"
      group_wait: 10s
      match_re:
        severity: error|warning
      continue: true

#    - receiver: "sms"
#      group_wait: 10s
#      match_re:
#        severity: error
#      continue: true

receivers:
  - name: "slack"
    slack_configs:
      - api_url: 'YOUR-WEBHOOK-URL'
        send_resolved: true
        channel: 'monitoring'
        text: "{{ range .Alerts }}<!channel> {{ .Annotations.summary }}\n{{ .Annotations.description }}\n{{ end }}"

#  - name: "sms"
#    webhook_config:
#      - url: http://a.b.c:8080/send/sms
#        send_resolved: true

You should be up & running with this sample configurations.
Spread your love for M2SH :)

#prometheus #prom #alert #alert_manager #docker #dockerfile #slack

https://pracucci.com/prometheus-understanding-the-delays-on-alerting.html

#prometheus #alertmanager #delay #group_wait #group_interval #alert

Create a linux SWAP file:

https://linuxize.com/post/create-a-linux-swap-file/

#linux #swap #swapfile #swappiness #swapon #mkswap

https://micro.mu/blog/

#golang #go #microservice #framework #micro #gomicro #blog

https://github.com/golang/go/wiki/Learn

#go #golang #wiki #learn

https://medium.com/rungo

#golang #go #tutorial #blog

sudo rm -rf /life/problems

sudo apt-get install +happiness -sadness

Install & configure gitlab-runner:

https://gist.github.com/muellermarkus/76a02f6fa46206d4ec61c5c0af9f357c

#gitlab #git #runner #runner #gitlab_runner #script #sh #gist #github