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flaf / email-from-my-freenas.md
Last active January 31, 2019 05:48
Strange email from my FreeNAS 
zstore-2.dc2.backbone.education changes in mounted filesystems:
1d0
< 192.168.19.20:/zstore/nunkis /root/mnt-zstore1-nunkis nfs	rw		0 0

zstore-2.dc2.backbone.education kernel log messages:
> CPU: AMD Opteron(tm) Processor 6128 (2000.06-MHz K8-class CPU)
> SMP: AP CPU #7 Launched!
> SMP: AP CPU #4 Launched!
@flaf
flaf / bonding-mac-address.md
Last active February 8, 2019 11:26
MAC address of bonding in Ubuntu 18.04

I'm on Ubuntu 18.04. According to the pastes below:

  • mac address of eno1 0c:c4:7a:c6:ae:26
  • mac address of eno2 0c:c4:7a:c6:ae:27
  • mac address of bond1 (bondig of eno1 and eno2) 92:da:30:66:27:50

Why 92:da:30:66:27:50 for bond1? No relation with the mac address of eno1 and eno2.

Here is the content of /etc/netplan/01-netcfg.yaml



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / rebase-old-branch.md
            
            

              Last active
              April 4, 2019 09:48
            

              
                Rebase an old branch
              
          

        

      

        

  

      

    
I have this:


A - B - C - F - G (master)
         \
          D - E (BranchB, origin/BranchB)



I want to have this:



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / endpoints-of-a-zonegroup.md
            
            

              Created
              April 1, 2019 07:12
            

              
                endpoints of a zonegroup
              
          

        

      

        

  

      

    
[root@ceph01 /]# radosgw-admin --cluster ceph-a zonegroup get
{
    "id": "47e7433a-bfe2-4c6a-b761-4cdf32cbf25c",
    "name": "zg-1",
    "api_name": "zg-1",
    "is_master": "true",
    "endpoints": [
        "http://s3.virt.priv:8080"
    ],



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / powershell-sort-array-of-objects.md
            
            

              Created
              June 16, 2019 21:11
            

              
                powershell-sort-array-of-objects
              
          

        

      

        

  

      

    
# pwsh
PowerShell 6.2.1
Copyright (c) Microsoft Corporation. All rights reserved.

https://aka.ms/pscore6-docs
Type 'help' to get help.

PS /root/mnt> class A {                                        
&gt;&gt; 




  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / crack.py
            
            

              Last active
              May 18, 2020 08:28
            

              
                python-and-multiprocessing
              
          

        

      

        

  

    
    


        



  


  

        

          
          #!/usr/bin/env python3
        

        

          
          

        

        

          
          import string
        

        

          
          import itertools
        

        

          
          import hashlib
        

        

          
          import json
        

        

          
          from multiprocessing import Pool, Manager
        

        

          
          

        

        

          
          U = string.ascii_uppercase # ['A', 'B', ..., 'Z']
        

        

          
          L = string.ascii_lowercase # ['a', 'b', ..., 'z']
        

  





    


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / subiquity.md
            
            

              Last active
              October 8, 2021 16:48
            

              
                subiquity: "storage" key in user-data not well taken into account
              
          

        

      

        

  

      

    
Auto-installation of Ubuntu Focal Fossa via ubuntu-20.04.3-live-server-amd64.iso. Here is my user-data file:


#cloud-config
autoinstall:
  version: 1
  locale: en_US.UTF-8
  keyboard:
    layout: fr
    variant: ""



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / custom-syslog-forwarding-in-journald.md
            
            

              Last active
              October 12, 2021 17:09
            

              
                custom syslog forwarding in journald?
              
          

        

      

        

  

      

    
Here is a typicall event/message from journald (via journalctl -f -o json | jq for readability):


{
  "_AUDIT_LOGINUID": "0",
  "SYSLOG_IDENTIFIER": "conmon",
  "__REALTIME_TIMESTAMP": "1634057819962204",
  "_GID": "0",
  "_CAP_EFFECTIVE": "1ffffffffff",
  "_SYSTEMD_SLICE": "machine.slice",



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / cloud-init-network-config.md
            
            

              Last active
              October 28, 2021 22:20
            

              
                cloud-init: bad support of "networking config version 2"
              
          

        

      

        

  

      

    
TL;DR


    

  1. It seems that the device ID (id0 in my example) is always used in the rendered configuration, but a udev rule is added to rename this interface to the device ID. The only way where the device ID is not used for me it's when I use set-name: <ifname> to force another name for the interface.
    2. 

  2. A match: rule with the name property doesn't work for me, in any case, with a fixed name or with globbing in name. The doc says that globbing in name can work only with networkd renderer (ie --output-kind networkd), but for me name has never worked in any case (the device ID is used and no udev rule is present).
    3. 





Here is my environment:



  


  




    


          
    

      

        
        

          

              @flaf
          

          

            
                flaf
                / keep-null-value.md
            
            

              Last active
              November 26, 2021 12:40
            

              
                [ansible] How to keep null value?
              
          

        

      

        

  

      

    
My playbook:


---
- hosts: "localhost"
  connection: "local"
  gather_facts: false
  vars:
    x: null
    y: