LVM: remove PV from VG

#
# Create test LV
#
for i in {1..3}; do
    truncate -s 1G disk${i}.img
    losetup /dev/loop${i} disk${i}.img
    pvcreate /dev/loop${i}
done
 
pvs
 
vgcreate vg0 /dev/loop1 /dev/loop2 /dev/loop3
 
vgs
 
lvcreate -n lv0 -l 100%FREE vg0
 
lvs
 
mkfs.ext4 /dev/vg0/lv0
 
mount /dev/vg0/lv0 /mnt/
 
df -h /mnt/
 
for i in {1..15}; do
    dd if=/dev/urandom of=/mnt/file${i} bs=1M count=100
done
 
md5sum /mnt/file?

Grafana

Install from repository
curl https://packagecloud.io/gpg.key | sudo apt-key add -
echo "deb https://packagecloud.io/grafana/stable/debian/ stretch main" | tee /etc/apt/sources.list.d/grafana_stable.list
sudo apt-get update
sudo apt install -y grafana

Credentials
http://SERVER_IP:3000/

Docker container
docker run -i -p 3000:3000 -e "GF_SERVER_ROOT_URL=http://10.0.3.164" -e "GF_SECURITY_ADMIN_PASSWORD=admin" grafana/grafana
user: admin
pass: admin

Configure Graphite datasource
Name: Graphite
Type: Graphite

Install prometheus under Ubuntu

Install from repository
sudo apt-get install -y prometheus
# optional
sudo apt-get install -y prometheus-node-exporter
sudo apt-get install -y prometheus-alertmanager
sudo apt-get install -y prometheus-pushgateway

Ansible installation
https://github.com/panticz/ansible/tree/master/roles/prometheus
- hosts: localhost
roles:
- prometheus

Login
http://SERVER_IP:9090/

Commands
avg_over_time(node_memory_MemAvailable[5m])/1024/1024

Repositroy

Install Couch DB under Ubuntu

Installation
wget https://couchdb.apache.org/repo/bintray-pubkey.asc -qO - | sudo apt-key add -
echo "deb https://apache.bintray.com/couchdb-deb $(lsb_release -cs) main" | sudo tee -a /etc/apt/sources.list.d/couchdb.list
sudo apt update

debconf-set-selections <<\EOF
couchdb couchdb/adminpass string admin
couchdb couchdb/adminpass_again string admin
couchdb couchdb/mode select standalone
couchdb couchdb/bindaddress string 0.0.0.0
EOF

sudo apt-get install -y couchdb

Login
http://SERVER_IP:5984/_utils/
user: admin
pass: admin

Build Wildfly deb package

# http://wildfly.org/downloads/
# https://github.com/mattthias/wildfly-packaging

VERSION=13.0.0.Final
REVISION=1

sudo apt-get install -y devscripts

# Download the "source" (the binary "Java EE7 Full & Web Distribution")
# wget http://download.jboss.org/wildfly/10.1.0.Final/wildfly-10.1.0.Final.tar.gz
# https://github.com/ilanddev/wildfly-debian/tree/master/debian

# download archive
mkdir /tmp/wildfly
wget http://download.jboss.org/wildfly/${VERSION}/wildfly-${VERSION}.tar.gz -q -O /tmp/wildfly/wildfly-${VERSION}.tar.gz

# create a link to archive
cd /tmp/wildfly

Install and configure autofs under Ubuntu

# install autofs package
apt-get install -y autofs

# create required directories
mkdir /etc/auto.master.d

# Configure NFS mount nas.example.com:/volume1/backup to /media/backup
echo "/media /etc/auto.media" >> /etc/auto.master.d/media.autofs
echo "backup -fstype=nfs,rw,async,vers=3 nas.example.com:/volume1/backup" >> /etc/auto.media

# check (directory will by created on access)
ll /media/backup

# debug
service autofs stop
sudo automount -f -v

Ansible playbook
https://github.com/panticz/ansible/blob/master/autofs-test.yml

Netplan

# /etc/netplan/01-netcfg.yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: yes
    eth1:
      dhcp4: no
      mtu: 9000
      addresses: [10.0.1.123/24]
      gateway4: 10.0.1.254
      nameservers:
        addresses: [10.0.1.1,8.8.8.8]
        search: [example.com, dev]
      routes:
       - to: 10.5.0.0/16
         via: 10.5.88.1
       - to: 10.8.0.0/25
         via: 10.5.88.1
 
 
########################################
 
# enable dhcp on all interfaces
# /etc/netplan/01-netcfg.yaml
network:
  version: 2
  renderer: networkd
  e

Create VLAN bridge under Linux (trunk, IEEE 802.1Q)

# install required package
apt-get install -y vlan
 
# /etc/network/interfaces
auto lo
iface lo inet loopback
 
auto eth0
iface eth0 inet manual
 
auto br0
iface br0 inet static
    address 10.0.6.12
    netmask 255.255.255.0
    gateway 10.0.6.1
    dns-nameservers 10.0.0.100 10.0.1.101
    dns-search example.com
    dns-domain example.com
    bridge_ports eth0
 
 
# VLAN 10
auto vlan10
iface vlan10 inet manual
    vlan-raw-device br0
 
auto br10
iface br10 inet manual
    bridge_ports vlan10
 
 
# VLAN 22
auto vlan22
iface vlan22 inet manual
    vlan-raw-device br0

oVirt

# install
https://www.ovirt.org/download/
sed -i 's|localhost|ovirt|g' /etc/hosts
sed -i 's|localdomain|dev|g' /etc/hosts
reboot
sudo yum install -y http://resources.ovirt.org/pub/yum-repo/ovirt-release42.rpm
sudo yum install -y ovirt-engine
sudo engine-setup --generate-answer=/tmp/ovirt.out

# cat /tmp/ovirt.out
# action=setup
[environment:default]
OVESETUP_DIALOG/confirmSettings=bool:True
OVESETUP_CONFIG/applicationMode=none:None
OVESETUP_CONFIG/remoteEngineSetupStyle=none:None
OVESETUP_CONFIG/sanWipeAfterDelete=bool:False
OVESETUP_CONFIG/storageIsLocal=bool:False

Syndicate content