blog
Table des matières
4 billet(s) pour janvier 2026
| AWX sur K8S Kind - partage de fichier pour les blob - Execution pods | 2026/01/26 10:15 | Jean-Baptiste |
| Notes rsh rcp | 2026/01/21 18:08 | Jean-Baptiste |
| Git - Duplication d'un dépôt | 2026/01/19 10:22 | Jean-Baptiste |
| Exemple simple de conf Nagios | 2026/01/14 10:07 | Jean-Baptiste |
Notes Multipath I/O MPIO
Voir :
Conf GNU/Linux:
Si LVM
sed -i -e "s/use_lvmetad \= 1/use_lvmetad \= 0/g" /etc/lvm/lvm.conf systemctl stop lvm2-lvmetad.service systemctl stop lvm2-lvmetad.socket #mkinitrd -f /boot/initrd-$(uname -r).img $(uname -r) dracut -H -f /boot/initramfs-$(uname -r).img $(uname -r) yum install device-mapper-multipath #dracut -f --add-drivers multipath
Voir gdisk et parted pour GPT
# fdisk /dev/sdc t 8e (LVM Linux) w
Création PV, VG, LV ⇒ voir LVM
Suite
multipath -ll modprobe dm_multipath /sbin/mpathconf systemctl start multipathd
/etc/multipath.conf
defaults { user_friendly_names yes find_multipaths yes }
Autre conf possible
# /lib/udev/scsi_id -g -u -d /dev/disk/by-path/*iscsi* 14945540000000000ed34fecd6b19c9dac92c6a5ccdddce57
/etc/multipath.conf
blacklist { wwid .* } blacklist_exceptions { wwid "14945540000000000ed34fecd6b19c9dac92c6a5ccdddce57" }
multipath -r multipath -ll
Autres
dracut -f --add-drivers multipath
multipath -F multipath -v2 multipath -r
Exemple
multipath -ll
multipathd show paths
/etc/multipath.conf
more /sys/class/fc_host/host?/port_state :::::::::::::: /sys/class/fc_host/host2/port_state :::::::::::::: Online :::::::::::::: /sys/class/fc_host/host3/port_state :::::::::::::: Online
blacklist {
devnode "^(ram|raw|loop|fd|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^fio[a-z]"
devnode "^dcssblk[0-9]*"
device {
vendor "DGC"
product "LUNZ"
}
device {
vendor "IBM"
product "S/390.*"
}
# don't count normal SATA devices as multipaths
device {
vendor "ATA"
}
# don't count 3ware devices as multipaths
device {
vendor "3ware"
}
device {
vendor "AMCC"
}
# nor highpoint devices
blacklist {
devnode "^(ram|raw|loop|fd|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^fio[a-z]"
devnode "^dcssblk[0-9]*"
device {
vendor "DGC"
product "LUNZ"
}
device {
vendor "IBM"
product "S/390.*"
}
# don't count normal SATA devices as multipaths
device {
vendor "ATA"
}
# don't count 3ware devices as multipaths
device {
vendor "3ware"
}
device {
vendor "AMCC"
}
# nor highpoint devices
device {
vendor "HPT"
}
Notes mplayer / mencoder
DVD
mplayer -nocache dvdnav://
https://doc.ubuntu-fr.org/poulsbo
mplayer -lavdopts threads=4 -framedrop votre_fichier_video.avi
Matrix
mplayer -vo matrixview video.mp4 mplayer -vo caca video.mp4
Boucles (loop)
# mplayer -loop <repeat count> # Setting count to zero (-loop 0) mplayer -loop 0 noise_white.wav
Autres
mencoder -oac help mencoder -ovc help
Notes module kernel Linux
How do I list loaded Linux module parameter values?
Source : http://serverfault.com/questions/62316/how-do-i-list-loaded-linux-module-parameter-values
cat /proc/modules | cut -f 1 -d " " | while read module; do \ echo "Module: $module"; \ if [ -d "/sys/module/$module/parameters" ]; then \ ls /sys/module/$module/parameters/ | while read parameter; do \ echo -n "Parameter: $parameter --> "; \ cat /sys/module/$module/parameters/$parameter; \ done; \ fi; \ echo; \ done
Systemd
systemctl status systemd-modules-load.service
Module Linux bootparam
Passer un argument à un module depuis le boot
nouveau.disable=yes
insmod - compatibility with the current running kernel - ignored "vermagic" check
modprobe --force-vermagic
Blacklister un module
module_blacklist=modname1,modname2,modname3
#module_to_blacklist.blacklist=yes
modprobe.blacklist=ahci
modprobe -r module_name cat >/etc/modprobe.d/local-blacklist.conf <<EOF blacklist module_name install module_name /bin/false EOF
hwdetect - Unused modules
Source : https://wiki.archlinux.org/title/hwdetect
#!/bin/bash modules=($(awk '{print $1}' /proc/modules)) for hw in $(hwdetect --show-modules | awk -F: '{gsub("-","_"); print $2}'); do if ! grep -q "$hw" <(printf '%s\n' "${modules[@]}"); then printf '%s\n' "$hw"; fi done
Pb
fsck erreur end_request: I/O error, dev fd0, sector 0
end_request: I/O error, dev fd0, sector 0
source : https://askubuntu.com/questions/719058/blk-update-request-i-o-error-dev-fd0-sector-0
sudo rmmod floppy echo "blacklist floppy" |sudo tee /etc/modprobe.d/blacklist-floppy.conf sudo dpkg-reconfigure initramfs-tools
Autres
depmod -n | grep nouveau | egrep -v '^alias'
In distributions where systemd is available, systemd-modules-load.service loads kernel modules from static lists in these files:
- /etc/modules-load.d/*.conf
- /run/modules-load.d/*.conf
- /usr/lib/modules-load.d/*.conf
Iptables
sudo tee /etc/modules-load.d/iptables.conf > /dev/null <<'EOF' ip6_tables ip6table_nat ip_tables iptable_nat EOF
sudo systemctl restart systemd-modules-load.service
lsmod | grep "ip.*table"
Notes MinIO s3
Voir :
- MinIO Operator
Voir aussi :
- Garage S3
Then open a web browser to http://localhost:9001/ and enter the default credentials:
| Username | minioadmin |
| Password | minioadmin |
Next, navigate to “Buckets”, click the “Create Bucket” button in the top right corner and then click the “Save” icon. Name your bucket, “mybkt”.
Client S3 mc
Voir :
mkdir -p ~/minio/data nerdctm run \ -p 9000:9000 \ -p 9001:9001 \ --name minio \ -v ~/minio/data:/data \ -e "MINIO_ROOT_USER=ROOTNAME" \ -e "MINIO_ROOT_PASSWORD=CHANGEME123" \ quay.io/minio/minio server /data --console-address ":9001"
mc alias set myminio http://127.0.0.1:9000 ROOTNAME CHANGEME123 mc admin info myminio
mc mb myminio/plop mc put ~/Documents/k8s_kind.txt myminio/plop/
mc --autocompletion
URL check ping http://localhost:9000/minio/health/live
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