rubi022

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# download the image
wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img

# create a new VM with VirtIO SCSI controller
qm create 9000 --memory 2048 --net0 virtio,bridge=vmbr0 --scsihw virtio-scsi-pci

# import the downloaded disk to the local-lvm storage, attaching it as a SCSI drive
qm set 9000 --scsi0 local-lvm:0,import-from=/path/to/bionic-server-cloudimg-amd64.img

rubi022

PostgreSQL Backup and Restore

Backup

Backup to .sql file

pg_dump -U username -d db_name -h host_name > out_filename.sql

# If using docker
docker container exec -it container_name pg_dump -U username -d db_name -h host_name > out_filename.sql

rubi022

#!/usr/bin/env bash

function cleanup() {
  echo "Cleaning up..."
  sudo rm -f /etc/sudoers.d/ubuntu_nopasswd
}

function install_brew() {
  $(which sudo) apt-get update
  $(which sudo) apt-get install -y sudo curl git

rubi022

https://cp.bulletservers.net/
https://bulletservers.net/

Add these sites to uptime.
we want to monitor uptime and if they go down we must act quickly to bring back these up.

https://statsup.xyz
https://app.statsup.xyz
https://postpi.xyz 
https://app.postpi.xyz

rubi022

root@zeus-H370M:~# zpool list
NAME   SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
one   3.62T  1.20T  2.42T        -         -     0%    33%  1.00x    ONLINE  -

root@zeus-H370M:~# df  -h | grep one
one             2.4T  128K  2.4T   1% /mount/vol/one



cd /mount/vol/one

rubi022

Initialise (will return keys and a token)

curl -X PUT http://0.0.0.0:8200/v1/sys/init --data '{"secret_shares":1, "secret_threshold":1}'

Use one of the keys to unseal

curl -X PUT http://0.0.0.0:8200/v1/sys/unseal --data '{"key":"a5e665962f544dd16471c120c5500a7906cfbaeb3f18ae0fc6c5c71d444f0a90"}'

Use the root token to store something

rubi022

qm create 9007 --memory 2048 --net0 virtio,bridge=vmbr0

# import the downloaded disk to local-lvm storage
qm importdisk 9007 CentOS-7-x86_64-GenericCloud-2111.qcow2 cru-zfs

# finally attach the new disk to the VM as scsi drive
qm set 9007 --scsihw virtio-scsi-pci --scsi0 cru-zfs:vm-9007-disk-0

rubi022

import 14gb file mysql


`
mysql -u root -p

set global net_buffer_length=1000000; --Set network buffer length to a large byte number

set global max_allowed_packet=1000000000; --Set maximum allowed packet size to a large byte number

rubi022

# ----------------------------------------------------------------------
# WARNING - do not edit this template unless you know what you are doing
# ----------------------------------------------------------------------

# the parent cache



# disk and memory cache settings
cache_dir ufs /usr/local/squid/var/cache 500 16 256 #set your cache path with size

rubi022

I ran into the battle of running all of my VMs and the host node under a single public IP address. Luckily, the host is just pure Debian, and ships with iptables.

What needs to be done is essentially to run all the VMs on a private internal network. Outbound internet access is done via NAT. Inbound access is via port forwarding.

Network configuration

Here’s how it’s done:

Create a virtual interface that serves as the gateway for your VMs: