tlhakhan

---
- name: expand the root filesystem
  lvol:
    lv: ubuntu-lv
    vg: ubuntu-vg
    size: 80%VG
    resizefs: true
...

tlhakhan

root@ubuntu-00:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                mb4yCN-v2A3-MJ0K-ri6z-ClR8-Gtb3-2950UI
  LV Write Access        read/write
  LV Creation host, time ubuntu-server, 2020-05-16 18:59:24 +0000
  LV Status              available
  # open                 1

tlhakhan

{
  "data-root": "/data/docker-data",
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "40m",
    "max-file": "100",
    "compress": "true"
  },
  "bip": "192.168.127.5/24",
  "default-address-pools":[

tlhakhan

global_defs {
  enable_script_security
}

vrrp_script check_script {
  script "/usr/bin/systemctl is-active {{ .ServiceName }}.service"
  weight 10
  interval 3
  fall 1
  rise 3

tlhakhan

[root@vs-1:~] esxcli network nic list 
Name    PCI Device    Driver  Admin Status  Link Status  Speed  Duplex  MAC Address         MTU  Description
------  ------------  ------  ------------  -----------  -----  ------  -----------------  ----  ------------------------------------------------
vmnic0  0000:00:1f.6  ne1000  Up            Up            1000  Full    94:c6:91:a5:40:79  1500  Intel Corporation Ethernet Connection (6) I219-V
vusb0   Pseudo        uether  Up            Up            1000  Full    00:50:b6:1b:f2:79  1500  ASIX Elec. Corp. AX88179
vusb1   Pseudo        uether  Up            Up            1000  Full    00:50:b6:ea:b8:42  1500  ASIX Elec. Corp. AX88179
vusb2   Pseudo        uether  Up            Up            1000  Full    00:50:b6:1e:dc:72  1500  ASIX Elec. Corp. AX88179

[root@vs-1:~] esxcli network nic list | grep vusb | awk '{print $1"_mac="$8}'
vusb0_mac=00:50:b6:1b:f2:79

tlhakhan

#
# Description:  Wait for 3 vusb interfaces to intialize and then refresh the ESXi host network settings.
# Original reference: https://flings.vmware.com/usb-network-native-driver-for-esxi#instructions
#

# Get status of 3 vusb interfaces to be "Up Up Up", see the use of 3 in head -n3 and xargs -n3.
vusb_status=$(esxcli network nic list | grep vusb | awk '{print $5}' | sort | head -n3 | xargs -n3)

# Loop until all 3 vusb interfaces are Up
# Waits a maximum of 20 * 10 seconds before falling through.  

tlhakhan

root@batfs0557:~# cat super_cache_scan.bt
#!/bin/env /usr/bin/bpftrace
#include <linux/types.h>
#include <asm-generic/atomic-long.h>
#include <linux/shrinker.h>

kprobe:super_cache_scan {
   $sc = (struct shrink_control *) arg1;
   @nr_to_scan[$sc->nid, comm, probe] = hist($sc->nr_to_scan);
}

tlhakhan

 time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz     c
08:45:22    13     0      0     0    0     0    0     0    0    64G   64G
08:45:23  1.8K     3      0     1    0     2   66     3    0    64G   64G
08:45:24  469K  2.0K      0   629    0  1.4K   11  2.0K    0    64G   64G
08:45:25  777K  3.9K      0  1.4K    0  2.5K   15  3.9K    0    64G   64G
08:45:26  819K  3.6K      0  1.4K    0  2.2K   15  3.6K    0    64G   64G
08:45:27  235K  1.2K      0   441    0   760   17  1.2K    0    64G   64G
08:45:28  253K  1.3K      0   529    0   736   24  1.3K    0    64G   64G
08:45:29  510K  2.6K      0   897    0  1.7K   17  2.6K    0    64G   64G
08:45:30   37K   118      0    59    0    59   25   118    0    64G   64G

tlhakhan

Every 1.0s: cat /proc/spl/kstat/zfs/arcstats  | grep evictable | grep -E '^mru|^mfu'                                                                                                                                                                                                      batfs0557: Mon Jul 26 10:57:53 2021

mru_evictable_data              4    0
mru_evictable_metadata          4    4096
mru_ghost_evictable_data        4    0
mru_ghost_evictable_metadata    4    0
mfu_evictable_data              4    0
mfu_evictable_metadata          4    0
mfu_ghost_evictable_data        4    0
mfu_ghost_evictable_metadata    4    0

tlhakhan

package task

import (
	"context"
	"encoding/json"
	"fmt"
	"github.com/gorilla/mux"
	"log"
	"net/http"
	"os/exec"