July 24, 2018 by ary

Failover using VRRP Keepalived

Requirements:

2 Server atau lebih dalam 1 jaringan yang sama
1 Virtual IP (VIP)

Disini saya menggunakan 3 Server Ubuntu 16.04 dan HAProxy dibelakangnya:
node1 = 10.0.0.5 node2 = 10.0.0.6 node3 = 10.0.0.7 VIP = 10.0.0.200

Langsung saja berikut cara Failover menggunakan VRRP (Virtual Router Redundancy Protocol) sebagai berikut

Pasang paket Keepalived disemua node

apt install keepalived -y

1	apt install keepalived -y

Buat Konfigurasi Keepalived disemua node

vim /etc/keepalived/keepalived.conf

1	vim /etc/keepalived/keepalived.conf

vrrp_script haproxy-check {
    script "killall -0 haproxy"
    interval 2
    weight 20
}
 
vrrp_instance haproxy-vip {
    state MASTER
    priority 101
    interface ens3
    virtual_router_id 51
    advert_int 3
 
    unicast_src_ip 10.0.0.5
    unicast_peer {
        10.0.0.6
        10.0.0.7
    }
 
    virtual_ipaddress {
        10.0.0.200
    }
 
    track_script {
        haproxy-check weight 20
    }

vrrp_script haproxy-check {

script "killall -0 haproxy"

interval 2

weight 20

}

vrrp_instance haproxy-vip {

state MASTER

priority 101

interface ens3

virtual_router_id 51

advert_int 3

unicast_src_ip 10.0.0.5

unicast_peer {

10.0.0.6

10.0.0.7

}

virtual_ipaddress {

10.0.0.200

}

track_script {

haproxy-check weight 20

}

Sesuaikan bagian:
interface (interface yang digunakan untuk failover)
priority (prioritas masing-masing node)
unicast_src_ip (IP node tersebut)
unicast_peer (IP node lainnya)

Muat ulang servis Keepalived

systemctl enable keepalived
systemctl restart keepalived
systemctl status keepalived

systemctl enable keepalived

systemctl restart keepalived

systemctl status keepalived

Verifikasi disemua node:

root@node3:~# ip address 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 52:54:00:52:a1:72 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.7/24 brd 10.0.0.255 scope global ens3
       valid_lft forever preferred_lft forever
    inet 10.0.0.200/32 scope global ens3
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fe52:a172/64 scope link

root@node3:~# ip address

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 52:54:00:52:a1:72 brd ff:ff:ff:ff:ff:ff

inet 10.0.0.7/24 brd 10.0.0.255 scope global ens3

valid_lft forever preferred_lft forever

inet 10.0.0.200/32 scope global ens3

valid_lft forever preferred_lft forever

inet6 fe80::5054:ff:fe52:a172/64 scope link

Test Failover
~ Matikan node yang saat ini menempel VIP
~ Pantau konfigurasi IP di node lainnya dengan perintah

watch -n1 ip address

1	watch -n1 ip address

Sekian.

June 10, 2018November 4, 2018 by ary

Attach Multiple Network Interfaces to Instance OpenStack

Dalam beberapa kasus kalian mungkin membutuhkan 2 Internal Network dalam satu Instance, dan itu memang sudah didukung dengan baik oleh OpenStack bahkan saat Instance sudah berjalan kita bisa dapat secara live menambahkan Interface baru 😀

Tapi jika ada lebih dari satu Interface dalam satu Instance, cloud-init/images tidak secara otomatis mengkonfigurasi seluruh Interface. Maka dari itu kita perlu melakukan langkah tambahan agar seluruh Interface dapat berjalan dengan semestinya:

CentOS 7
Cara Ke-1:

sudo ip addr

1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:d4:31:b5 brd ff:ff:ff:ff:ff:ff
    inet 10.10.10.10/24 brd 10.99.99.255 scope global dynamic eth0
       valid_lft 60138sec preferred_lft 60138sec
    inet6 fe80::f816:3eff:fed4:31b5/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: &lt;BROADCAST,MULTICAST&gt; mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether fa:16:3e:f2:65:4a brd ff:ff:ff:ff:ff:ff

sudo ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether fa:16:3e:d4:31:b5 brd ff:ff:ff:ff:ff:ff

inet 10.10.10.10/24 brd 10.99.99.255 scope global dynamic eth0

valid_lft 60138sec preferred_lft 60138sec

inet6 fe80::f816:3eff:fed4:31b5/64 scope link

valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000

link/ether fa:16:3e:f2:65:4a brd ff:ff:ff:ff:ff:ff

Buat berkas Konfigurasi eth1

sudo cp -v /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth1

1	sudo cp -v /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth1

Sesuaikan Device dan HWADDR

sudo vi /etc/sysconfig/network-scripts/ifcfg-eth1

BOOTPROTO=dhcp
DEVICE=eth1
HWADDR=fa:16:3e:f2:65:4a
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
DEFROUTE=no

sudo vi /etc/sysconfig/network-scripts/ifcfg-eth1

BOOTPROTO=dhcp

DEVICE=eth1

HWADDR=fa:16:3e:f2:65:4a

ONBOOT=yes

TYPE=Ethernet

USERCTL=no

DEFROUTE=no

Bring up eth1

sudo ifup eth1

1	sudo ifup eth1

Verifikasi

sudo ip addr
1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:d4:31:b5 brd ff:ff:ff:ff:ff:ff
    inet 10.10.10.10/24 brd 10.99.99.255 scope global dynamic eth0
       valid_lft 60138sec preferred_lft 60138sec
    inet6 fe80::f816:3eff:fed4:31b5/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:f2:65:4a brd ff:ff:ff:ff:ff:ff
    inet 10.11.11.10/24 brd 10.199.199.255 scope global dynamic eth1
       valid_lft 85976sec preferred_lft 85976sec
    inet6 fe80::f816:3eff:fef2:654a/64 scope link 
       valid_lft forever preferred_lft forever

sudo ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether fa:16:3e:d4:31:b5 brd ff:ff:ff:ff:ff:ff

inet 10.10.10.10/24 brd 10.99.99.255 scope global dynamic eth0

valid_lft 60138sec preferred_lft 60138sec

inet6 fe80::f816:3eff:fed4:31b5/64 scope link

valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether fa:16:3e:f2:65:4a brd ff:ff:ff:ff:ff:ff

inet 10.11.11.10/24 brd 10.199.199.255 scope global dynamic eth1

valid_lft 85976sec preferred_lft 85976sec

inet6 fe80::f816:3eff:fef2:654a/64 scope link

valid_lft forever preferred_lft forever

Cara Ke-2:
Dengan menambahkan Configuration > Customisation Script berikut pada saat membuat Instance baru dengan Multiple Interface:

#!/bin/bash
sudo -i
echo "dhclient" >> /etc/rc.local
chmod +x /etc/rc.local
/etc/rc.local

#!/bin/bash

sudo -i

echo "dhclient" >> /etc/rc.local

chmod +x /etc/rc.local

/etc/rc.local

Ubuntu 16.04

vim K99multinic.sh

1	vim K99multinic.sh

#!/bin/bash
hname=$(hostname)
cat /etc/hosts | grep $hname >> /dev/null
if [ $? -ne 0 ];then
 sudo bash -c "echo '127.0.0.1 $hname' >> /etc/hosts"
fi
netfile=$(find /etc/network/interfaces.d -name "*.cfg")
for interface in $(ls -1 /sys/class/net | grep ens) ;do
   cat $netfile | grep $interface >> /dev/null
   if [ $? -ne 0 ];then
     sudo bash -c "echo 'auto $interface' >> ${netfile}"
     sudo bash -c "echo 'iface $interface inet dhcp' >> ${netfile}"
     sudo ifup $interface
  fi
done

#!/bin/bash

hname=$(hostname)

cat /etc/hosts | grep $hname >> /dev/null

if [ $? -ne 0 ];then

sudo bash -c "echo '127.0.0.1 $hname' >> /etc/hosts"

netfile=$(find /etc/network/interfaces.d -name "*.cfg")

for interface in $(ls -1 /sys/class/net | grep ens) ;do

cat $netfile | grep $interface >> /dev/null

if [ $? -ne 0 ];then

sudo bash -c "echo 'auto $interface' >> ${netfile}"

sudo bash -c "echo 'iface $interface inet dhcp' >> ${netfile}"

sudo ifup $interface

done

Ubah permission dan Eksekusi skrip

chmod +x K99multinic.sh
./K99multinic.sh

1 2	chmod +x K99multinic.sh ./K99multinic.sh

Ubah kepemilikan lalu simpan ke /etc/rc0.d/ agar skrip dieksekusi saat reboot

sudo chown root:root K99multinic.sh
sudo mv K99multinic.sh /etc/rc0.d/

1 2	sudo chown root:root K99multinic.sh sudo mv K99multinic.sh /etc/rc0.d/

Ujicoba reboot Instance

sudo reboot

1	sudo reboot

Sekian dan Selamat Liburan. 🙂

Refrensi: https://support.metacloud.com/hc/en-us/articles/115002332667-Configuring-a-VM-to-work-with-multiple-network-interfaces
https://leadwithoutatitle.wordpress.com/2017/07/06/how-to-create-a-multi-nic-ubuntu-cloud-image/

May 31, 2018 by ary

Grep Volume ID OpenStack

List Volume ID di Satu Project

openstack volume list -f value --project user | awk '{print $1}'

1	openstack volume list -f value --project user \| awk '{print $1}'

List Volume ID di Banyak Project

while read X; do openstack volume list -f value --project $X; done < file.csv | awk '{print $1}'

1	while read X; do openstack volume list -f value --project $X; done < file.csv \| awk '{print $1}'

Sekian. 🙂

March 30, 2018May 24, 2018 by ary

Force Delete Cinder Volume OpenStack

[root@controller~]# cinder list

1	[root@controller~]# cinder list

[root@controller~]# cinder reset-state --state available $VOLUME_UUID

1	[root@controller~]# cinder reset-state --state available $VOLUME_UUID

[root@controller~]# mysql -u root -p

1	[root@controller~]# mysql -u root -p

mysql> use cinder;

1	mysql> use cinder;

mysql>update volumes set attach_status='detached',status='available' where id ='$VOLUME_UUID';

1	mysql>update volumes set attach_status='detached',status='available' where id ='$VOLUME_UUID';

[root@controller~]# cinder delete $VOLUME_UUID

1	[root@controller~]# cinder delete $VOLUME_UUID

mysql>update volumes set deleted=1,status='deleted',deleted_at=now(),updated_at=now() where deleted=0 and id='$VOLUME_UUID';

1	mysql>update volumes set deleted=1,status='deleted',deleted_at=now(),updated_at=now() where deleted=0 and id='$VOLUME_UUID';

February 17, 2018July 13, 2018 by ary

Membuat Instance OpenStack dengan Fixed IP

Linux, OpenStack
fixed ip, neutron, nova, OpenStack, port, static
Leave a comment

Terkadang kita mungkin memiliki kebutuhan untuk membuat sebuah instance dengan fixed IP (~~statis~~) tertentu. Untuk melakukan ini kita harus membuat secara manual port neutron. panduan ini bisa dilakukan untuk network External atau Internal

BUI (Browser User Interface)

1. Masuk Panel Admin > Networks > Ports > Klik Network External > Ports

2. Klik +Create Port lalu isi kan bagian yang dibutuhkan sebagai berikut:

3. Membuat Instance seperti biasa, hanya saja pada tab Networks di lewat atau di Unselect gunakan Network Ports yang sudah kita buat tadi

4. Verifikasi Instance sudah berjalan dengan IP statis yang sudah kita buat tadi

CLI (Command Line Interface)

Jika kalian lebih terbiasa menggunakan CLI, berikut caranya:

neutron port-create --fixed-ip subnet_id=SUBNET_ID,ip_address=IP_FROM_POOL --name PORT_NAME NETWORK_ID

1	neutron port-create --fixed-ip subnet_id=SUBNET_ID,ip_address=IP_FROM_POOL --name PORT_NAME NETWORK_ID

[root@controller ~(keystone_admin)]# neutron subnet-list
+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+
| id                                   | name            | tenant_id                        | cidr          | allocation_pools                                 |
+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+
| cfd88ecd-9f98-43b1-9946-a4f691ea697e | subnet-external | 0f21133e62fd4bdb8c2af962047036ec | 10.11.11.0/24 | {"start": "10.11.11.100", "end": "10.11.11.200"} |
+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron subnet-list

+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+

+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+

| cfd88ecd-9f98-43b1-9946-a4f691ea697e | subnet-external | 0f21133e62fd4bdb8c2af962047036ec | 10.11.11.0/24 | {"start": "10.11.11.100", "end": "10.11.11.200"} |

+--------------------------------------+-----------------+----------------------------------+---------------+--------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron net-list
+--------------------------------------+----------+----------------------------------+----------------------------------------------------+
| id                                   | name     | tenant_id                        | subnets                                            |
+--------------------------------------+----------+----------------------------------+----------------------------------------------------+
| a2709ab0-5fb0-4c7a-b8c7-43f4f43179b8 | external | 0f21133e62fd4bdb8c2af962047036ec | cfd88ecd-9f98-43b1-9946-a4f691ea697e 10.11.11.0/24 |
+--------------------------------------+----------+----------------------------------+----------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron net-list

+--------------------------------------+----------+----------------------------------+----------------------------------------------------+

+--------------------------------------+----------+----------------------------------+----------------------------------------------------+

+--------------------------------------+----------+----------------------------------+----------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron port-create --fixed-ip subnet_id=cfd88ecd-9f98-43b1-9946-a4f691ea697e,ip_address=10.11.11.160 --name net_10.11.11.160 a2709ab0-5fb0-4c7a-b8c7-43f4f43179b8

Created a new port:
+-----------------------+-------------------------------------------------------------------------------------+
| Field                 | Value                                                                               |
+-----------------------+-------------------------------------------------------------------------------------+
| admin_state_up        | True                                                                                |
| allowed_address_pairs |                                                                                     |
| binding:host_id       |                                                                                     |
| binding:profile       | {}                                                                                  |
| binding:vif_details   | {}                                                                                  |
| binding:vif_type      | unbound                                                                             |
| binding:vnic_type     | normal                                                                              |
| created_at            | 2018-02-16T23:33:33Z                                                                |
| description           |                                                                                     |
| device_id             |                                                                                     |
| device_owner          |                                                                                     |
| extra_dhcp_opts       |                                                                                     |
| fixed_ips             | {"subnet_id": "cfd88ecd-9f98-43b1-9946-a4f691ea697e", "ip_address": "10.11.11.160"} |
| id                    | 4d8ca200-0aff-4ef0-9115-6bdbe6ee04f1                                                |
| mac_address           | fa:16:3e:21:b7:ef                                                                   |
| name                  | net_10.11.11.160                                                                    |
| network_id            | a2709ab0-5fb0-4c7a-b8c7-43f4f43179b8                                                |
| project_id            | 0f21133e62fd4bdb8c2af962047036ec                                                    |
| revision_number       | 4                                                                                   |
| security_groups       | 4740f9f0-c5d7-4922-9163-31b9e2b97354                                                |
| status                | DOWN                                                                                |
| tags                  |                                                                                     |
| tenant_id             | 0f21133e62fd4bdb8c2af962047036ec                                                    |
| updated_at            | 2018-02-16T23:33:33Z                                                                |
+-----------------------+-------------------------------------------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron port-create --fixed-ip subnet_id=cfd88ecd-9f98-43b1-9946-a4f691ea697e,ip_address=10.11.11.160 --name net_10.11.11.160 a2709ab0-5fb0-4c7a-b8c7-43f4f43179b8

Created a new port:

+-----------------------+-------------------------------------------------------------------------------------+

| Field | Value |

+-----------------------+-------------------------------------------------------------------------------------+

| admin_state_up | True |

| allowed_address_pairs | |

| binding:host_id | |

| binding:profile | {} |

| binding:vif_details | {} |

| binding:vif_type | unbound |

| binding:vnic_type | normal |

| created_at | 2018-02-16T23:33:33Z |

| description | |

| device_id | |

| device_owner | |

| extra_dhcp_opts | |

| fixed_ips | {"subnet_id": "cfd88ecd-9f98-43b1-9946-a4f691ea697e", "ip_address": "10.11.11.160"} |

| id | 4d8ca200-0aff-4ef0-9115-6bdbe6ee04f1 |

| mac_address | fa:16:3e:21:b7:ef |

| name | net_10.11.11.160 |

| network_id | a2709ab0-5fb0-4c7a-b8c7-43f4f43179b8 |

| project_id | 0f21133e62fd4bdb8c2af962047036ec |

| revision_number | 4 |

| security_groups | 4740f9f0-c5d7-4922-9163-31b9e2b97354 |

| status | DOWN |

| tags | |

| tenant_id | 0f21133e62fd4bdb8c2af962047036ec |

| updated_at | 2018-02-16T23:33:33Z |

+-----------------------+-------------------------------------------------------------------------------------+

[root@controller ~(keystone_admin)]# neutron port-list
+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+
| id                                   | name             | tenant_id                        | mac_address       | fixed_ips                                |
+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+
| 4d8ca200-0aff-4ef0-9115-6bdbe6ee04f1 | net_10.11.11.160 | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:21:b7:ef | {"subnet_id": "cfd88ecd-                 |
|                                      |                  |                                  |                   | 9f98-43b1-9946-a4f691ea697e",            |
|                                      |                  |                                  |                   | "ip_address": "10.11.11.160"}            |
| b7925295-79a6-4200-8078-cde16db6aa53 | net_10.11.11.150 | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:c3:cf:51 | {"subnet_id": "cfd88ecd-                 |
|                                      |                  |                                  |                   | 9f98-43b1-9946-a4f691ea697e",            |
|                                      |                  |                                  |                   | "ip_address": "10.11.11.150"}            |
| d65239ef-8544-4893-a334-0100e9dcd2d3 |                  | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:35:9b:cd | {"subnet_id": "cfd88ecd-                 |
|                                      |                  |                                  |                   | 9f98-43b1-9946-a4f691ea697e",            |
|                                      |                  |                                  |                   | "ip_address": "10.11.11.100"}            |
+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+

[root@controller ~(keystone_admin)]# neutron port-list

+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+

+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+

| 4d8ca200-0aff-4ef0-9115-6bdbe6ee04f1 | net_10.11.11.160 | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:21:b7:ef | {"subnet_id": "cfd88ecd- |

| | | | | "ip_address": "10.11.11.160"} |

| b7925295-79a6-4200-8078-cde16db6aa53 | net_10.11.11.150 | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:c3:cf:51 | {"subnet_id": "cfd88ecd- |

| | | | | "ip_address": "10.11.11.150"} |

| d65239ef-8544-4893-a334-0100e9dcd2d3 | | 0f21133e62fd4bdb8c2af962047036ec | fa:16:3e:35:9b:cd | {"subnet_id": "cfd88ecd- |

| | | | | "ip_address": "10.11.11.100"} |

+--------------------------------------+------------------+----------------------------------+-------------------+------------------------------------------+

Sekian.

ROAR

cuma situs Blog biasa, berisikan catatan hasil oprekan dan cerita perjalanan pribadi.

Failover using VRRP Keepalived

Attach Multiple Network Interfaces to Instance OpenStack

Grep Volume ID OpenStack

Force Delete Cinder Volume OpenStack

Membuat Instance OpenStack dengan Fixed IP