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

سوپرمن میخوان یا برنامه نویس؟؟؟

In order to checkout all files in a project in GIT:

git checkout -- .

#git #checkout

https://www.atlassian.com/git/tutorials/rewriting-history/git-rebase

#git #git_rebase #rebase

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Did you know that python print command takes sep argument as a separator between string arguments?

print('ali', 'reza', sep=', ') # output: ali, reza

#python #print #sep #separator

https://www.thoughtworks.com/insights/blog/rest-api-design-resource-modeling

#RESTAPI #REST #API #collection #resource #CQRS #CRUD #URI #URN #REST_API

#sigkill vs #sigterm