Dustin C. Hatch
90421e77d2
When there is a network issue that prevents DNS names from being resolved, it can be difficult to troubleshoot. For example, last night, the Samba domain controller crashed, so *pyrocufflink.blue* names were unavailable. Furthermore, the domain controller VM was apparently locked up, so I could not SSH into it directly, and it needed to be rebooted. Since the VM host's name did not resolve, I could not find its address to log into it and reboot the VM. I resorted to scanning the SSH keys of every IP address on the network until I found the one that matched the cached key in ~/.ssh/known_hosts. This was cumbersome and annoying. Assigning DHCP reservations to the VM hosts will ensure that when a situation like this arises again, I can quickly connect to the correct VM host and manage its virtual machines, as its address is recorded in the configuration policy.
119 lines
2.9 KiB
YAML
119 lines
2.9 KiB
YAML
dhcp_ddns: true
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dhcp_subnets:
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# Management
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- address: 172.30.0.240/28
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pools:
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- start: 172.30.0.245
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end: 172.30.0.253
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routers:
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- 172.30.0.241
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domain_name: pyrocufflink.blue
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ddns_updates: false
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dns_servers: '{{ dch_networks.mgmt.dns_servers_v4 }}'
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ntp_servers: '{{ dch_networks.mgmt.ntp_servers }}'
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unifi_address: ubnt.pyrocufflink.blue
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# pyrocufflink.blue
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- address: 172.30.0.0/26
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pools:
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- start: 172.30.0.20
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end: 172.30.0.59
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routers:
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- 172.30.0.1
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dns_servers: '{{ dch_networks.blue.dns_servers_v4 }}'
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domain_name: pyrocufflink.blue
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domain_search: pyrocufflink.blue
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ntp_servers: '{{ dch_networks.blue.ntp_servers }}'
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ddns_updates: false
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# pyrocufflink.red
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- address: 172.31.1.0/24
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pools:
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- start: 172.31.1.2
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end: 172.31.1.254
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routers:
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- 172.31.1.1
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dns_servers: '{{ dch_networks.red.dns_servers_v4 }}'
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domain_name: pyrocufflink.red
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domain_search: pyrocufflink.red pyrocufflink.blue pyrocufflink.jazz
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ntp_servers: '{{ dch_networks.red.ntp_servers }}'
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dynamic_hostnames: true
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default_lease: 3600
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max_lease: 28800
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dhcp_reservations:
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# pyrocufflink.blue
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- host: vpn0.pyrocufflink.blue
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ip_addr: 172.30.0.2
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mac_addr: 52:54:00:db:54:e2
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- host: dns1.pyrocufflink.blue
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ip_addr: 172.30.0.3
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mac_addr: b8:27:eb:1b:d9:23
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- host: dns0.pyrocufflink.blue
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ip_addr: 172.30.0.4
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mac_addr: 52:54:00:b8:8b:64
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- host: file0.pyrocufflink.blue
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ip_addr: 172.30.0.5
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mac_addr: 52:54:00:2a:9b:7e
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- host: web0.pyrocufflink.blue
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ip_addr: 172.30.0.6
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mac_addr: 52:54:00:ef:16:ac
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- host: zbx0.pyrocufflink.blue
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ip_addr: 172.30.0.7
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duid: ff:4a:0e:44:56:00:02:00:00:ab:11:ef:11:04:5c:28:85:54:96
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- host: dc1.pyrocufflink.blue
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ip_addr: 172.30.0.9
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mac_addr: b8:27:eb:0d:db:19
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- host: dc0.pyrocufflink.blue
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ip_addr: 172.30.0.10
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mac_addr: 52:54:00:e0:fa:f9
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- host: proxy0.pyrocufflink.blue
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ip_addr: 172.30.0.11
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mac_addr: 52:54:00:88:e9:af
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- host: smtp1.pyrocufflink.blue
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ip_addr: 172.30.0.12
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mac_addr: 52:54:00:48:29:d6
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- host: diddy.pyrocufflink.blue
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ip_addr: 172.30.0.13
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mac_addr: 74:da:38:8f:94:4f
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- host: serial0.pyrocufflink.blue
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ip_addr: 172.30.0.16
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mac_addr: b8:27:eb:c4:34:be
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- host: logs0.pyrocufflink.blue
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ip_addr: 172.30.0.17
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mac_addr: 52:54:00:b1:84:98
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- host: vmhost0.pyrocufflink.blue
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ip_addr: 172.30.0.18
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mac_addr: e0:d5:5e:a2:2e:1a
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- host: vmhost1.pyrocufflink.blue
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ip_addr: 172.30.0.19
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mac_addr: e0:d5:5e:6e:ad:ac
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# Management
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- host: unifi0
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mac_addr: 52:54:00:7c:26:8d
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ip_addr: 172.30.0.242
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- host: Downstairs-AP
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ip_addr: 172.30.0.243
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mac_addr: 80:2a:a8:90:ed:d6
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- host: Upstairs-AP
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ip_addr: 172.30.0.244
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mac_addr: f0:9f:c2:cb:b9:b0
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dhcp_ddns_keys:
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- name: dhcp-ddns
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secret: +0zVSpY8oFrxl2F1qB8tT2HMgbuD31JurL9w4zilNCg=
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dhcp_ddns_zones:
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- zone: 0.31.0.172.in-addr.arpa
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primary: 172.31.0.4
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- zone: pyrocufflink.red
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primary: 172.30.0.4
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key: dhcp-ddns
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- zone: 1.31.172.in-addr.arpa
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primary: 172.30.0.4
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key: dhcp-ddns
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