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--- docker_notes:docker-dhcp [2023-07-09 Sun wk27 14:14] – [main dhcp4] baumkp
+++ docker_notes:docker-dhcp [2024-01-10 Wed wk02 19:13] – [Docker - DHCP Server] baumkp
@@ Line 1: / Line 1: @@
 {{tag>linux docker kea dhcp}}
 ======Docker - DHCP Server======
-I propose to create a Docker ISC Kea Image using base Docker Alpine Linux images, with S6 init system. <fs x-small>(ISC Kea is a modern replacement for their DHCP.)</fs>
+Since mid 2023 I have been running a Docker ISC Kea Image using base Docker Alpine Linux images, with S6 init system. <fs x-small>(ISC Kea is a modern replacement for their DHCP.)</fs>  The main DHCP server runs on my main server and I have an automatic fall over back up on my separate Linux router.  I basically followed the Kea template [[https://kea.readthedocs.io/en/latest/arm/config-templates.html#template-home-network-of-a-power-user|Home Network of a Power User]].  I was never quite sure I had the automatic fall over back-up working. On 2023-01-02 I modified a configuration file on the primary server with a syntax error. Today, 8 days later I notice millions of lines of errors on my log files.  Sure enough the backup had simply been working.  I fixed up the simple syntax error and the primary server took back over.  Everything basically worked as expected.
 ISC also has a project for a simple GUI interface primarily for Kea and basic for Bind9.  There is apparently no Alpine package yet for Stork.
@@ Line 24: / Line 24: @@
 |isc-kea-perfdhcp|Optional. Includes a DHCP performance testing tool from ISC.|?|
 |isc-kea-shell|Text client for Kea DHCP Control Agent.|?|
-<fs xx-large><fc #ff0000>Work not stated yet</fc></fs>
 ====Network Ports====
@@ Line 39: / Line 37: @@
 ====DHCP testing====
 ''%%sudo nmap --script broadcast-dhcp-discover%%'' will test the DHCP servers on the same network.
+===Reference===
+  *[[https://serverfault.com/questions/171744/command-line-program-to-test-dhcp-service|Command line program to test DHCP service]]
+  *[[https://nmap.org/book/toc.html|The Official Nmap Project Guide to Network Discovery and Security Scanning]]
+  *[[https://www.redhat.com/sysadmin/nmap-scripting-engine|5 scripts for getting started with the Nmap Scripting Engine]]
 ====main dhcp4====
   *''kea-dhcp4 -t /app/dhcpv4.conf'' to test the kea-dhcp4 configuration files ''/app/dhcpv4.conf''
   *''kea-dhcp4 -c /app/dhcpv4.conf'' to start kea dhcp4 using configuration file ''/app/dhcpv4.conf''
+++++Use of symlink, TL;DR;|
+Using symlinks in is confusing when using Docker mounted directories.
 To control which dhcp4 config file to run (basic or plus):
   *''ln -s .config/dhcp_basic.conf .config/dhcp.conf'' to run basic
   *''ln -s .config/dhcp_plus.conf .config/dhcp.conf'' to run plus
     *The ''-f'' flag can be used to overwrite an existing link file instead of deleting first.
-The plus configuration allows a secondary backup dhcp server to be operated.
+The plus configuration allows a secondary backup dhcp server to be operated.++++
+  *''kea-dhcp4 -c /app/dhcpv4_plus.conf'' to start kea dhcp4 using configuration file ''/app/dhcpv4_plus.conf''.  This configuration file is designed to work with the kea control agent setup.  Where as the basic configuration ''/app/dhcpv4_basic.conf'' is not.
 ====ctrl-agent -t /app/kea-ctrl-agent.conf====
   *''kea-ctrl-agent -t /app/kea-ctrl-agent.conf'' to test the kea-cont-agent configuration file ''/app/kea-ctrl-agent.conf''
   *''kea-ctrl-agent -c /app/kea-ctrl-agent.conf'' to start the kea-cont-agent configuration file ''/app/kea-ctrl-agent.conf''
+  *[[https://kea.readthedocs.io/en/latest/arm/agent.html|The Kea Control Agent]]
+====Kea logging====
+  *[[https://kb.isc.org/docs/kea-logging-configuration|Kea Logging Configuration]]
+I have stored log files in the .config directory that is a Docker mounted volume for persistence and easy external viewing outside container.  The following logs files can be seen.
+  * ''.config/log/kea-dhcp4-commands.log''
+  * ''.config/log/kea-dhcp4-dhcpsrv.log''
+  * ''.config/log/kea-dhcp4-leases.log''
+  * ''.config/log/kea-dhcp4.log''
+  * ''.config/log/kea-dhcp4-ha-hooks.log''
+====Kea Miscellaneous====
+  *''docker attach kptr-kea-1'' to attach to running container
+  *''kea-dhcp4 -v'' To check running version
 =====References=====
   *KPTree.net's bare metal implementation of [[linux_router:dns_dhcp|dns - dhcp]], based upon ISC Bind9 and DHCP on Debian 10 <fs xx-small>(was originally Ubuntu)</fs>.
@@ Line 59: / Line 81: @@
     *[[https://kb.isc.org/docs/kea-configuration-sections-explained|Kea Configuration Introduction]]
     *[[https://kb.isc.org/docs/kea-configuration-for-small-office-or-home-use|Kea Configuration for Small Office or Home Use]]
+    *[[https://web-wilke.de/install-and-run-kea-dhcp-with-stork-on-debian-11/|Install and run KEA DHCP with Stork on Debian 11]]
+    *[[https://github.com/JonasAlfredsson/docker-kea| JonasAlfredsson / docker-kea ]]
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