[pve-devel] [RFC pve-network 3/6] sdn: dhcp: add abstract class for DHCP plugins

[Stefan Hanreich <s.hanreich@proxmox.com>]

This abstract class provides several hooks that should be called
during the config regeneration process:

before_regenerate
Should be called before the plugin does any configuration tasks. The
main usage for this hook is tearing down old instances.

after_regenerate
Should be called after the plugin has finished generating any
configuration. The main usage for this hook is to perform cleanup and
restart / reload services.

before_configure
Should be called before creating the configuration for a specific DHCP
instance, as defined in the dhcp.cfg. This can be used for performing
instance-specific setup.

after_configure
Should be called after the configuration for a specific DHCP instance,
as defined in the dhcp.cfg. This will mainly be used for enabling and
restarting / reloading a specific instance of a DHCP server.

configure_subnet
This function configures the DHCP ranges for a given DHCP server and
subnet. This will usually involve generating configuration files based
on the SDN configuration.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 src/PVE/Network/SDN/Dhcp/Makefile  |  8 ++++
 src/PVE/Network/SDN/Dhcp/Plugin.pm | 76 ++++++++++++++++++++++++++++++
 src/PVE/Network/SDN/Makefile       |  1 +
 3 files changed, 85 insertions(+)
 create mode 100644 src/PVE/Network/SDN/Dhcp/Makefile
 create mode 100644 src/PVE/Network/SDN/Dhcp/Plugin.pm

diff --git a/src/PVE/Network/SDN/Dhcp/Makefile b/src/PVE/Network/SDN/Dhcp/Makefile
new file mode 100644
index 0000000..1e9b6d3
--- /dev/null
+++ b/src/PVE/Network/SDN/Dhcp/Makefile
@@ -0,0 +1,8 @@
+SOURCES=Plugin.pm
+
+
+PERL5DIR=${DESTDIR}/usr/share/perl5
+
+.PHONY: install
+install:
+	for i in ${SOURCES}; do install -D -m 0644 $$i ${PERL5DIR}/PVE/Network/SDN/Dhcp/$$i; done
diff --git a/src/PVE/Network/SDN/Dhcp/Plugin.pm b/src/PVE/Network/SDN/Dhcp/Plugin.pm
new file mode 100644
index 0000000..31ca9e3
--- /dev/null
+++ b/src/PVE/Network/SDN/Dhcp/Plugin.pm
@@ -0,0 +1,76 @@
+package PVE::Network::SDN::Dhcp::Plugin;
+
+use strict;
+use warnings;
+
+use PVE::Cluster;
+use PVE::JSONSchema qw(get_standard_option);
+
+use base qw(PVE::SectionConfig);
+
+PVE::Cluster::cfs_register_file('sdn/dhcp.cfg',
+    sub { __PACKAGE__->parse_config(@_); },
+    sub { __PACKAGE__->write_config(@_); },
+);
+
+my $defaultData = {
+    propertyList => {
+	type => {
+	    description => "Plugin type.",
+	    format => 'pve-configid',
+	    type => 'string',
+	},
+	node => {
+	    type => 'array',
+	    description => 'A list of nodes where this DHCP server should be deployed',
+	    items => get_standard_option('pve-node'),
+	},
+	'lease-time' => {
+	    type => 'integer',
+	    description => 'Lifetime for the DHCP leases of this DNS server',
+	    minimum => '1',
+	},
+    },
+};
+
+sub private {
+    return $defaultData;
+}
+
+sub options {
+    return {
+	node => {
+	    optional => 1,
+	},
+	'lease-time' => {
+	    optional => 1,
+	},
+    };
+}
+
+sub configure_subnet {
+    my ($class, $dhcp_config, $subnet_config, $range_config) = @_;
+    die 'implement in sub class';
+}
+
+sub before_configure {
+    my ($class, $dhcp_config) = @_;
+    die 'implement in sub class';
+}
+
+sub after_configure {
+    my ($class, $dhcp_config) = @_;
+    die 'implement in sub class';
+}
+
+sub before_regenerate {
+    my ($class) = @_;
+    die 'implement in sub class';
+}
+
+sub after_regenerate {
+    my ($class, $dhcp_config) = @_;
+    die 'implement in sub class';
+}
+
+1;
diff --git a/src/PVE/Network/SDN/Makefile b/src/PVE/Network/SDN/Makefile
index 92cfcd0..848f7d4 100644
--- a/src/PVE/Network/SDN/Makefile
+++ b/src/PVE/Network/SDN/Makefile
@@ -10,4 +10,5 @@ install:
 	make -C Zones install
 	make -C Ipams install
 	make -C Dns install
+	make -C Dhcp install

--
2.39.2