This is my first time when I am setting up LXD to run multiple containers. I have done all the configuration steps but my container not getting IP address from DHCP server which is running inside my organization. Please help me out.
I am using Bridge interface profile. Below are changes I have made:
root#DMG-LXD-TVM2:~# vi /etc/network/interfaces
auto br0
iface br0 inet dhcp
bridge-ports ens32
bridge-ifaces ens32
iface ens32 inet dhcp
root#DMG-LXD-TVM2:~# lxc list
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
| Continer1 | RUNNING | | | PERSISTENT | 0 |
IP and interface details what i setup on my ubuntu machine
Dhcp message when doing ifdown eth0 && ifup eth0 inside container
This is an older question, but I decided to answer it, since I got stuck on the same topic and the solution isn't exactly obvious.
If you want your container to obtain its ip configuration from an external device (e.g. internet router, company dhcp server), you need to tell it so, at creation time. This is done via a configuration parameter pair user.network_mode=dhcp
Since this configuration is in "user" space, it is not normed, but works on ubuntu 16.04. For details see: https://github.com/lxc/lxd/blob/master/doc/configuration.md
Step 1: create bridge on the host in /etc/network/interfaces
auto br0
iface br0 inet dhcp
bridge_ports ens32
bridge_stp off
bridge_fd 0
Step 2: create you own lxd profile called mydhcp
lxd profile create mydhcp
or reconfigure your default lxd configuration by calling
sudo dpkg-reconfigure -p medium lxd
(You need to choose at the first prompt and add on the second prompt, then enter your bridge's name)
If you use your own profile, edit it
lxc profile edit mydhcp
paste the following
name: mydhcp
config:
user.network_mode: dhcp
description: Profile for creating dhcp containers
devices:
eth0:
name: eth0
nictype: bridged
parent: br0
type: nic
(Note the spaces - this is a YAML file, the spaces matter!)
Step 3: create a new container using you mydhcp profile
lxc launch ubuntu:16.04 mydhcpcontainer -p mydhcp -c user.network_mode=dhcp
if you changed the default lxd configuration in the previous step, just enter
lxc launch ubuntu:16.04 mydhcpcontainer -c user.network_mode=dhcp
Check your new container's ip address with
lxc exec mydhcpcontainer -- ifconfig
I have next vagrant file on my windows host
Vagrant.configure(2) do |config|
config.vm.provider :virtualbox do |v|
v.customize [
"modifyvm", :id,
"--memory", 1024,
"--cpus", 1,
]
end
config.vm.box = "ubuntu/trusty64"
config.vm.network "private_network", ip: "192.168.0.101"
end
Virtual machine starts normally but is unreachable from host by "192.168.0.101" ip. /etc/network/interface on guest is
auto lo
iface lo inet loopback
source /etc/network/interfaces.d/*.cfg
#VAGRANT-BEGIN
# The contents below are automatically generated by Vagrant. Do not modify.
auto eth1
iface eth1 inet static
address 192.168.0.101
netmask 255.255.255.0
#VAGRANT-END
and /etc/network/interfaces.d/eth0.cfg is
auto eth0
iface eth0 inet dhcp
Additionally after each run that vagrant, the new virtual network adapter is created and inside Virtualbox UI tool I see info about that new network - real IP is diffrent and random i.e. 169.254.173.8. I had >20 virtual networks :) By that IP guest machine is pinged and from itself also. But after restart vagrant the new network will be created with new IP
How to run vagrant machine with static unchangable IP? I need to build cluster with several nodes and each node must know about IP of each one
Update:
On Linux host machine all it's OK. I can ping all guests from my host and guets see each other
On Windows guests can't ping other guests i.e. 192.168.0.101 can't see 192.168.0.102
The private network is just that, private to the guest(s), and it's created in addition to the default NAT-ed adapter. If you have several guests, they can interact with each other on the private network.
Regarding the nodes interacting, there are a number of plugins that can help you manage that, both with actual DNS as well as more simply using /etc/hosts. I tried a few and settled on vagrant-hosts.
I want to set up multiple virtual machines to run webserver, postfix, etc.
I have a few public IP-Adresses from my ISP. My host system is running Centos 7 and my virtual machines are running Debian Wheezy. Since my hoster restrict access to the switch based on MAC Address, I cannot use a "full" bridge.
Instead I configured a routed bridge (see http://wiki.hetzner.de/index.php/Proxmox_VE)
I have successfully set up both machines, but the vm cannot connect to the internet if my firewall on my host machine is active. If my firewall is active I can ping machines on the internet from my vm, but nothing else.
How can I configure my firewall under Centos 7 to give the VMs on br0 acces to internet?
Any help is appreciated. Thank you very much.
Network Config Host Machine
Host-Machine: /etc/sysconfig/network-scripts/ifcfg-enp2s0
BOOTPROTO=none
DEVICE=enp2s0
ONBOOT=yes
IPADDR=A.A.A.42
NETMASK=255.255.255.255
SCOPE="peer A.A.A.1"
Host-Machine: /etc/sysconfig/network-scripts/route-enp2s0
ADDRESS0=0.0.0.0
NETMASK0=0.0.0.0
GATEWAY0=A.A.A.1
Host-Machine: /etc/sysconfig/network-scripts/ifcfg-br0
DEVICE=br0
TYPE="Bridge"
ONBOOT=yes
BOOTPROTO=none
IPADDR=A.A.A.42
NETMASK=255.255.255.255
STP=off
DELAY=0
Host Machine: /etc/sysconfig/network-scripts/route-br0
ADDRESS0=B.B.B.160
NETMASK0=255.255.255.255
Network Config Virtual machine
Virtual machine: /etc/network/interfaces
auto lo
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet static
address B.B.B.160
netmask 255.255.255.255
pointopoint A.A.A.42
gateway A.A.A.42
Firewall settings Host machine
firewall-cmd --list-all
public (default, active)
interfaces: br0 enp2s0
sources:
services: dhcpv6-client ssh
ports:
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
Thank you very much in advance.
To accomplish, you have two options.
Option1:(from a security perspective this method is recommended)
Disable netfilter on the configured bridge
# vi /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
Check the values before/after.
# sysctl -p /etc/sysctl.conf
Option2:
Add direct firewall rule
firewall-cmd --direct --add-chain ipv4 filter FORWARD 0 -m physdev --physdev-is-bridged -j ACCEPT
On CentOS 8 (and probably CentOS 7) with firewalld, there's a much easier way to get all routed bridged KVM virtual machines full unrestricted internet access without dealing with firewall rules.
By default, all interfaces are bound to the public firewall zone.
But there are multiple zones, ie firewall-cmd --list-all-zones of which one is called trusted, which is an unfiltered firewall zone that accepts all packets by default.
So you can just bind the bridge interface to that zone.
firewall-cmd --remove-interface br0 --zone=public --permanent
firewall-cmd --add-interface br0 --zone=trusted --permanent
firewall-cmd --reload
Hope this helps.
I am new to openstack and I followed the installation guide of icehouse for ubuntu 12.04/14.04
I chose 3 node architecture. Controller, Nova, Neutron.
The 3 nodes are installed in VM's. I used nested KVM. Inside VM's kvm is supported so nova will use virt_type=kvm. In controller I created 2 nics. eth0 is a NAT interface with ip 203.0.113.94 and eth1 a host only interface with ip 10.0.0.11.
In nova there are 3 nics. eth0 NAT - 203.0.113.23, eth1 host only 10.0.0.31 and eth2 another host only 10.0.1.31
In neutron 3 nics. eth0 NAT 203.0.113.234, eth1 host only 10.0.0.21 and eth2 another hosty only 10.0.1.21 (during installation guide in neutron node i created a br-ex (and a port to eth0) which took the settings of eth0 and eth0 settings are:
auto eth0 iface eth0 inet manual up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down)
Everything seemed fine. I can create networks, routers etc, boot instances but I have this error.
When I launch an instance it takes a fixed ip but when I log in into instance (cirros) can't ping anything. ifconfig with no ip.
I noticed that in demo-net (tenant network) properties under subnet in the ports field it has 3 ports. 172.16.1.1 network:router_interface active 172.16.1.3 network:dhcp active 172.16.1.6 compute:nova down
I searched for solutions over the net but couldn't find anything!
Any help?
Ask me if you want specific logs because I don't know which ones to post!
Thanks anyway!
Looks like you are using Fixed IP to ping..If so please assign floating IP to your instance, and then try to ping..
If you have already assigned floating IP and you are pinging using that IP..please upload log of your instance
I have a vagrant virtual box up and running. So far I have been unable to connect to the web server. here is the start up:
[jesse#Athens VVV-1.1]$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter 1: nat
default: Adapter 2: hostonly
==> default: Forwarding ports...
default: 22 => 2222 (adapter 1)
==> default: Running 'pre-boot' VM customizations...
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
default: SSH address: 127.0.0.1:2222
default: SSH username: vagrant
default: SSH auth method: private key
default: Warning: Connection timeout. Retrying...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
default: The guest additions on this VM do not match the installed version of
default: VirtualBox! In most cases this is fine, but in rare cases it can
default: prevent things such as shared folders from working properly. If you see
default: shared folder errors, please make sure the guest additions within the
default: virtual machine match the version of VirtualBox you have installed on
default: your host and reload your VM.
default:
default: Guest Additions Version: 4.2.0
default: VirtualBox Version: 4.3
==> default: Setting hostname...
==> default: Configuring and enabling network interfaces...
==> default: Mounting shared folders...
default: /vagrant => /home/jesse/vagrant/vvvStable/VVV-1.1
default: /srv/www => /home/jesse/vagrant/vvvStable/VVV-1.1/www
default: /srv/config => /home/jesse/vagrant/vvvStable/VVV-1.1/config
default: /srv/database => /home/jesse/vagrant/vvvStable/VVV-1.1/database
default: /var/lib/mysql => /home/jesse/vagrant/vvvStable/VVV-1.1/database/data
==> default: VM already provisioned. Run `vagrant provision` or use `--provision` to force it
==> default: Checking for host entries
on my host console, ip addr show yields:
4: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
5: vboxnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 0a:00:27:00:00:01 brd ff:ff:ff:ff:ff:ff
on the guest it yields:
vagrant#vvv:~$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 qlen 1000
link/ether 08:00:27:12:96:98 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
inet6 fe80::a00:27ff:fe12:9698/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:2c:d4:3e brd ff:ff:ff:ff:ff:ff
inet 192.168.50.4/24 brd 192.168.50.255 scope global eth1
For now, all I want to do is access the web server on the virtual machine, whatever way works. I have tried a variety of things, just shooting in the dark. I would be happy to provide any specific info. Any help or suggestions would be greatly appreciated
Based on the output provided, the box has 2 network interfaces, 1 is the default NAT and the other private - ask you said.
The reason why you are not able to access the web site hosted within the VM thru the private interface: it could be that host eth0 or wlan0 IP address is not in the same network as the private interface -> 192.168.50.4/24 and there is no route.
To access the the site hosted by the web server within the guest, you have the following options:
1. NAT port forwarding
Forward the web port, e.g. 80 to host's 8080 (you can't use 80 because it is a privileged port on *NIX). Add the following
Vagrant.configure("2") do |config|
config.vm.network "forwarded_port", guest: 80, host: 8080,
auto_correct: true
end
NOTE: auto_correct will resolve port conflicts if the port on host is already in use.
DO a vagrant reload and you'll be able to access the site via http://localhost:8080/
2. Public Network (VirtualBox Bridged networking)
Add a public network interface
Vagrant.configure("2") do |config|
config.vm.network "public_network"
end
Get the IP of VM after it is up and running, port forwarding does NOT apply to bridged networking. So you'll be accessing the site by using http://IP_ADDR, if within the VM it binds to 80, otherwise specify the port.
One more possibility just for future reference.
Normally when you create VMs using private networking, Vagrant (Virtualbox? not sure) creates corresponding entries in the host's routing table. You can see these using
netstat -rn
Somehow my host had gotten into a state where creating the VMs did not result in new routes appearing in the routing table, with the corresponding inability to connect. Again you can see the routes not appearing using the command above.
Creating the route manually allowed me to reach the VMs. For example:
sudo route -nv add -net 10.0.4 -interface vboxnet
(Substitute the appropriate network and interface.) But I didn't want to have to do that.
Based on this question, I tried restarting my host and Vagrant started automatically creating the routing table entries again.
Not sure exactly what the issue was, but hopefully this helps somebody.
Your interface is down
I had the same issue. It was my vboxnet0 interface who was down. Within the listing of ip addr you have <BROADCAST,MULTICAST> for your interface but it should be <BROADCAST,MULTICAST,UP,LOWER_UP>.
That's mean you interface is down.
You can confirm with sudo ifconfig. The interface will not be shown but if you add -a you will see it : sudo ifconfig -a.
how to bring it up
So to bring it up you can do :
sudo ifconfig vbox
OR
sudo ip link set vboxnet0 up
Both works.
Alternatively, you could use manual port forwarding via SSH (SSH tunneling):
ssh -L 80:127.0.0.1:80 vagrant#127.0.0.1 -p 2222
That binds host port 80 to VM port 80 via your SSH session to the VM.
I ended up getting the private network to work as well by deleting it within Virtual Box. When I recreated it again with vagrant up, the ip config became:
vboxnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 192.168.50.1/24 brd 192.168.50.255 scope global vboxnet0
valid_lft forever preferred_lft forever
I had a similar issue on my Mac. VirtualBox uses host only for private networks. To use as an internal network I had to add this to the private network configuration:
"virtualbox__intnet: true"
This may not apply exactly, but "private network" in the title brought me here and others may benefit that are trying to run multiple guest boxes on Mac OS X:
I use "private_network" and don't do any port forwarding. I.e. I access my VMs by hosts like "project1.local", "project2.local".
So, I was surprised when I tried to launch a second box (a scotch/box ubuntu for LAMP) and it refused to launch with an error (excerpt):
"...The forwarded port to 2222 is already in use on the host machine..."
The error message's proposed solution doesn't work. I.e. add this to your Vagrantfile:
config.vm.network :forwarded_port, guest: 22, host: 1234
#Where 1234 would be a different port.
I am not sure why it happens because I've run multiples before (but not scotch/box). The problem is that even if you use private_network, Vagrant uses port forwarding for SSH.
The solution is to set ports SPECIFICALLY FOR SSH by adding this to your Vagrant files:
# Specify SSH config explicitly with unique host port for each box
config.vm.network :forwarded_port,
guest: 22,
host: 1234,
id: "ssh",
auto_correct: true
Note: auto_correct may make non-unique port #s work, but I haven't tested that.
Now, you can run multiple VMs at the same time using private networking.
(Thanks to Aaron Aaron and his posting here: https://groups.google.com/forum/#!topic/vagrant-up/HwqFegoCXOc)
Was having the same issue with Arch (2017-01-01). Had to install net-tools: sudo pacman -S net-tools
Virtual Box 5.1.12r112440, Vagrant 1.9.1.
You have set a private network in for your vagrant machine
If that ip is not visible then ssh to your vagrant machine and fire this command
sudo /etc/init.d/networking restart
Check to stop your firewall and iptables too