This is a WIP patch series, since I will be gone for 3 weeks and wanted to
share my current progress with the DHCP support for SDN.
This patch series adds support for automatically deploying dnsmasq as a DHCP
server to a simple SDN Zone.
While certainly not 100% polished on some ends (looking at restarting systemd
services in particular), the general idea behind the mechanism shows. I wanted
to gather some feedback on how I approached designing the plugins and the
config regeneration process before comitting to this design by creating an API
and UI around it.
You need to install dnsmasq (and disable it afterwards):
apt install dnsmasq && systemctl disable --now dnsmasq
You can use the following example configuration for deploying a DHCP server in
a SDN subnet:
/etc/pve/sdn/dhcp.cfg:
dnsmasq: nat
/etc/pve/sdn/zones.cfg:
simple: DHCPNAT
ipam pve
/etc/pve/sdn/vnets.cfg:
vnet: dhcpnat
zone DHCPNAT
/etc/pve/sdn/subnets.cfg:
subnet: DHCPNAT-10.1.0.0-16
vnet dhcpnat
dhcp-dns-server 10.1.0.1
dhcp-range server=nat,start-address=10.1.0.100,end-address=10.1.0.200
gateway 10.1.0.1
snat 1
Then apply the SDN configuration:
pvesh set /cluster/sdn
You need to apply the SDN configuration once after adding the dhcp-range lines
to the configuration, since the running configuration is used for managing
DHCP. It will not work otherwise!
For testing it can be helpful to monitor the following files (e.g. with watch)
to find out what is happening
* /etc/dnsmasq.d/<dhcp_id>/ethers (on each node)
* /etc/pve/priv/ipam.db
Changes from v1 -> v2:
* added hooks for handling DHCP when starting / stopping / .. VMs and CTs
* Get an IP from IPAM and register that IP in the DHCP server
(pve only for now)
* remove lease-time, since it is now infinite and managed by the VM lifecycle
* add hooks for setting & deleting DHCP mappings to DHCP plugins
* modified interface of the abstract class to reflect new requirements
* added helpers in existing SDN classes
* simplified DHCP configuration settings
pve-cluster:
Stefan Hanreich (1):
cluster files: add dhcp.cfg
src/PVE/Cluster.pm | 1 +
src/pmxcfs/status.c | 1 +
2 files changed, 2 insertions(+)
pve-network:
Stefan Hanreich (6):
subnets: vnets: preparations for DHCP plugins
dhcp: add abstract class for DHCP plugins
dhcp: subnet: add DHCP options to subnet configuration
dhcp: add DHCP plugin for dnsmasq
ipam: Add helper methods for DHCP to PVE IPAM
dhcp: regenerate config for DHCP servers on reload
debian/control | 1 +
src/PVE/Network/SDN.pm | 11 +-
src/PVE/Network/SDN/Dhcp.pm | 192 +++++++++++++++++++++++++
src/PVE/Network/SDN/Dhcp/Dnsmasq.pm | 186 ++++++++++++++++++++++++
src/PVE/Network/SDN/Dhcp/Makefile | 8 ++
src/PVE/Network/SDN/Dhcp/Plugin.pm | 83 +++++++++++
src/PVE/Network/SDN/Ipams/PVEPlugin.pm | 64 +++++++++
src/PVE/Network/SDN/Makefile | 3 +-
src/PVE/Network/SDN/SubnetPlugin.pm | 32 +++++
src/PVE/Network/SDN/Subnets.pm | 43 ++++--
src/PVE/Network/SDN/Vnets.pm | 27 ++--
11 files changed, 622 insertions(+), 28 deletions(-)
create mode 100644 src/PVE/Network/SDN/Dhcp.pm
create mode 100644 src/PVE/Network/SDN/Dhcp/Dnsmasq.pm
create mode 100644 src/PVE/Network/SDN/Dhcp/Makefile
create mode 100644 src/PVE/Network/SDN/Dhcp/Plugin.pm
pve-manager:
Stefan Hanreich (1):
sdn: regenerate DHCP config on reload
PVE/API2/Network.pm | 1 +
1 file changed, 1 insertion(+)
qemu-server:
Stefan Hanreich (1):
sdn: dhcp: add DHCP setup to vm-network-scripts
PVE/QemuServer.pm | 14 ++++++++++++++
vm-network-scripts/pve-bridge | 3 +++
vm-network-scripts/pve-bridgedown | 19 +++++++++++++++++++
3 files changed, 36 insertions(+)
pve-container:
Stefan Hanreich (1):
sdn: dhcp: setup DHCP mappings in LXC hooks
src/PVE/LXC.pm | 10 ++++++++++
src/lxc-pve-poststop-hook | 1 +
src/lxc-pve-prestart-hook | 9 +++++++++
3 files changed, 20 insertions(+)
Summary over all repositories:
20 files changed, 681 insertions(+), 28 deletions(-)
--
murpp v0.4.0
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