new: [dhcp] new charm

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

dhcp/build/Dockerfile

@@ -0,0 +1,12 @@
+FROM alpine:latest
+
+LABEL description="ISC DHCP Server on Alpine Linux"
+
+RUN apk --no-cache add dhcp
+
+ENTRYPOINT ["/usr/sbin/dhcpd", "-4", \
+                        "-d", \
+                        # "-cf", "/config/dhcpd.conf", \
+                        # "-lf", "/config/dhcpd.leases", \
+                        "-user", "dhcp", \
+                        "-group", "dhcp"]

dhcp/hooks/init

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+## Init is run on host
+## For now it is run every time the script is launched, but
+## it should be launched only once after build.
+
+## Accessible variables are:
+## - SERVICE_NAME        Name of current service
+## - DOCKER_BASE_IMAGE   Base image from which this service might be built if any
+## - SERVICE_DATASTORE           Location on host of the DATASTORE of this service
+## - SERVICE_CONFIGSTORE         Location on host of the CONFIGSTORE of this service
+
+
+config=$(options-get config 2>/dev/null) || true
+
+mkdir -p "$SERVICE_CONFIGSTORE"/etc/dhcp &&
+e "$config" > "$SERVICE_CONFIGSTORE"/etc/dhcp/dhcpd.conf

dhcp/metadata.yml

@@ -0,0 +1,53 @@
+data-resources:
+  - /var/lib/dhcp
+  - /var/log/dhcp
+config-resources:
+  - /etc/dhcp/dhcpd.conf
+default-options:
+  # config: |
+  #   ## Sample configuration file for ISC dhcpd
+
+  #   option domain-name "example.org";
+  #   option domain-name-servers ns1.example.org, ns2.example.org;
+  #   default-lease-time 600;
+  #   max-lease-time 7200;
+  #   #ddns-update-style none;
+  #   authoritative;
+  #   log-facility local7;
+
+  #   ## No service will be given on this subnet, but declaring it allows the dhcp
+  #   ## server to listen on this network
+  #   subnet 172.17.0.0 netmask 255.255.255.0 {
+  #   }
+
+  #   ## This is a very basic subnet declaration.
+  #   subnet 10.254.239.0 netmask 255.255.255.224 {
+  #     range 10.254.239.10 10.254.239.20;
+  #     option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
+  #   }
+
+  #   ## A slightly different configuration for an internal subnet.
+  #   subnet 10.5.5.0 netmask 255.255.255.224 {
+  #     range 10.5.5.26 10.5.5.30;
+  #     option domain-name-servers ns1.internal.example.org;
+  #     option domain-name "internal.example.org";
+  #     option routers 10.5.5.1;
+  #     option broadcast-address 10.5.5.31;
+  #     default-lease-time 600;
+  #     max-lease-time 7200;
+  #   }
+
+  #   ## Fixed IP addresses can also be specified for hosts.   These addresses
+  #   ## should not also be listed as being available for dynamic assignment.
+  #   ## Hosts for which fixed IP addresses have been specified can boot using
+  #   ## BOOTP or DHCP.   Hosts for which no fixed address is specified can only
+  #   ## be booted with DHCP, unless there is an address range on the subnet
+  #   ## to which a BOOTP client is connected which has the dynamic-bootp flag
+  #   ## set.
+  #   host fantasia {
+  #     hardware ethernet 08:00:07:26:c0:a5;
+  #     fixed-address fantasia.example.com;
+  #   }
+docker-compose:
+  ports:
+    - 67:67/udp