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.
Related
I installed Ubuntu 16.04 Server on a machine with 4 network cards. I have interfaces eth0 and eth1 connected to the same switch. The interface eth0 is meant for the remote SSH connection to manage the server. I want to use eth1 to be bridged by br0. This bridge I want to use for LXC containers. This setup in a DHCP environment did not cause me any problems. The challenge is that the network this server is installed in is fully static. I received an IP range for this server with same subnet mask and gateway.
Setting up eth0 was no problem:
auto eth0
iface eth0 inet static
address 195.x.x.2
network 195.x.x.0
netmask 255.255.255.0
gateway 195.x.x.1
broadcast 195.x.x.255
dns-nameservers 150.x.x.105 150.x.x.106
The problem comes with the second interface eth1, because it has the same gateway as eth0 Ubuntu warns that only one default gateway can be set (which is logical). Therefor I had set eth1 as follows:
auto eth1
iface eth1 net static
address 195.x.x.3
network 195.x.x.0
netmask 255.255.255.0
broadcast 195.x.x.255
Problem with this setup is that I can externally ping eth0 at IP 195.x.x.2 but eth1 cannot be pinged or accessed via SSH. I managed to make it work with a lot of routing trickery but as many articles write on this that this way is a hole which gets deeper if you have static bridge and containers for this.
My question is: Does anyone has a straight forward approach for my issue? How should I configure eth0 and eth1 to normally bridge the containers to eth1 with static IP numbers?
Ok I solved it in the following manner, by still proceeding with the gateway routing solution as described in the question. Maybe people with the same issue could use this approach as well or if somebody knows a better solution feel free to comment.
On the host:
I enabled ARP filtering:
sysctl -w net.ip4.conf.all.arp_filter=1
echo "net.ipv4.conf.all.arp_filter = 1" >> /etc/sysctl.conf
Configured the /etc/network/interfaces:
auto lo
iface lo net loopback
# The primary network interface
auto etc0
iface eth0 inet static
address 195.x.x.2
network 195.x.x.0
netmask 255.255.255.0
gateway 195.x.x.1
broadcast 195.x.x.255
up ip route add 195.x.x.0/24 dev eth0 src 195.x.x.2 table eth0table
up ip route add default via 195.x.x.1 dev eth0 table eth0table
up ip rule add from 195.x.x.2 table eth0table
up ip route add 195.x.x.0/24 dev eth0 src 195.0.0.2
dns-nameservers 150.x.x.105 150.x.x.106
# The secondary network interface
auto eth1
iface eth1 net manual
# LXC bridge interface
auto br0
iface br0 inet static
address 195.x.x.3
network 195.x.x.0
netmask 255.255.255.0
bridge_ifaces eth1
bridge_ports eth1
bridge_stp off
bridge_fd 0
bridge_maxwait 0
up ip route add 195.x.x.0/24 dev br0 src 195.x.x.3 table br0table
up ip route add default via 195.x.x.1 dev br0 table br0table
up ip rule add from 195.x.x.3 table br0table
up ip route add 195.x.x.0/24 dev br0 src 195.0.0.3
Added the following lines to /etc/iproute2/rt_tables:
...
10 et0table
20 br0table
At the container config file (/var/lib/lxc/[container name]/config):
...
lxc.network.type = vets
lxc.network.link = br0
lxc.network.flags = up
lxc.network.hwadr = [auto create when bringing up container]
lxc.network.ipv4 = 195.x.x.4/24
lxc.network.ipv4.gateway = 195.x.x.1
lxc.network.veth.pair = [readable server name] (when using ifconfig)
lxc.start.auto = 0 (1 if you want the server to autostart)
lxc.start.delay = 0 (fill in seconds you want the container to wait before start)
I tested it by enabling apache2 on the container and accessed the webpage from outside the network. Hope it helps anybody who bumps into the same challenge I did.
PS: Do not forget if you choose to have the container's config file to assign the IP, that you disable it in the interface file of the container itself.
auto lo
iface lo inet loopback
auto eth0
iface eth0 net manual
Recently we brought raspberry pi 3b.Beginning we used to access the internet using an ethernet cable and it used to connect properly but now raspberry pi is not able to reach the gateway itself and it's taking its default IP address i.e 169.xxx.xxx.xx.
what would be the issue?we tried to reinstalling the operating system again the same issue .it worked for one day after that same problem.so please help me to solve the issue.
Finally, I am able to figure it out after trial and error method. I have missed "auto eth0" before the iface statement i.e
auto eth0
iface eth0 inet static
address xxx.xxx.xxx.xxx
network 255.255.255.0
gateway xxx.xxx.xxx.xxx
dns-nameservers 8.8.8.8
Assuming that you have a windows computer available, open cmd and run the following command:
ipconfig
note down the values that display. Now on your pi, enter the command
sudo nano /etc/network/interfaces
This will open the network interfaces file. Look for the line similar to 'inet eth0 inet manual' Then remove this line and everything to do with the eth0 interface, since we are going to start over.
in the interfaces file, add the following section:
auto eth0
inet eth0 inet static
address xxx.xxx.xxx.xxx
network 255.255.255.0
gateway xxx.xxx.xxx.xxx
dns-nameservers 8.8.8.8
Replace the x in address with the first 3 groups of the value taken from the windows system. For example, if the ip address on the windows system was 192.168.0.221, enter 192.168.0.xxx
The last group of xxx for address should be something unique to everything else on your network.
'gateway' should be whatever the gateway value in windows was (assuming these machines are on the same network)
[Ctrl]+[x], Save changes
reboot via
sudo reboot
once the system has rebooted
ifconfig eth0
should list the new settings. Test them by pinging the below address (google)
sudo ping 8.8.8.8
I have 1 host with ip 10.120.194.214/24
And I have a range set from my router to my host ip, the range is 10.120.187.0/24 and his gateway is 10.120.187.1
I'm trying to create a docker network with this range
docker network create --driver=bridge --subnet=10.120.187.0/24 --ip- range=10.120.187.128/25 --gateway=10.120.187.254 -o "com.docker.network.bridge.enable_icc=true" -o "com.docker.network.bridge.host_binding_ipv4"="10.120.187.1" mypublicnet
if I try to ping to 10.120.187.254 from the LAN i don't receive ping
the host configuration is this
iface eth0 inet manual
auto vmbr0
iface vmbr0 inet static
address 10.120.194.214
netmask 255.255.255.0
gateway 10.120.194.1
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
dns-nameservers 10.120.194.1 10.120.194.10
The idea is that I can run containers with ip accesible from the LAN, Every container must have diferent ip.
Contrary to what you think, docker bridge network is not bridged to the physical interface, but is NATed.
To achieve what you are asking for in production, use Pipework or, if you are cutting edge, you can try the docker macvlan driver which is, for now, experimental.
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