Chapter 10. Troubleshooting the DNS service By reviewing the Red Hat OpenStack Platform DNS service (designate) logs and using some simple commands, you can verify that the service is running properly. These actions are the first steps in troubleshooting the DNS service. The topics included in this section are: Section 10.1, "DNS service and BIND logs" Section 10.2, "Exporting the DNS service pool configuration" Section 10.3, "Listing available DNS service endpoints" 10.1. DNS service and BIND logs Reviewing the Red Hat OpenStack Platform DNS service (designate) logs, can be useful when troubleshooting issues. The DNS service logs are located in /var/log/containers/designate . There is one log for each of the component services: central.log designate-api.log mdns.log producer.log worker.log The logs for the BIND server that Red Hat supplies with the RHOSP DNS service are located in /var/log/containers/designate/designate-bind : central.log designate-api.log 10.2. Exporting the DNS service pool configuration You can use a copy of the DNS pool configuration to troubleshoot the Red Hat OpenStack Platform (RHOSP) DNS service (designate). Note In RHOSP 17.1, multiple pools are not supported. Procedure Log in to one of the Controller nodes and display the current running DNS service pool configuration to the console. Example In this example, the administrator accesses a Controller node, controller-0.ctlplane , through SSH as the tripleo-admin user and executes the designate-manage pool show_config command running in the designate_central container: Sample output If you want to export the current pool configuration to a file, use the designate-manage pool generate_file command. Example In this example, the administrator accesses a Controller node, controller-0.ctlplane , through SSH as the tripleo-admin user and executes the designate-manage pool generate_file --file <file_name> command running in the designate_central container. The DNS service exports the current pool configuration to a file that is specified by the --file option, in this example, ~/my_dns_service_config.yaml : Tip Use the podman cp command to copy files from a container to your local system. 10.3. Listing available DNS service endpoints Determining the Red Hat OpenStack Platform DNS service (designate) endpoint and its status, can be useful when troubleshooting issues. Procedure Source your credentials file. Example List the available RHOSP service endpoints: Sample output

Commands:
ssh tripleo-admin@controller-0.ctlplane sudo podman exec designate_central designate-manage pool show_config
Pool Configuration: ------------------- also_notifies: [] attributes: {} description: Default Pool id: 794ccc2c-d751-44fe-b57f-8894c9f5c842 name: default nameservers: - host: 192.0.2.111 port: 53 - host: 192.0.2.109 port: 53 - host: 192.0.2.131 port: 53 ns_records: - hostname: ns2.example.com. priority: 2 - hostname: ns1.example.com. priority: 1 - hostname: ns3.example.com. priority: 3 targets: - description: BIND9 Server 3 masters: - host: 192.0.2.137 port: 16002 - host: 192.0.2.137 port: 16001 - host: 192.0.2.137 port: 16000 options: host: 192.0.2.111 port: '53' rndc_config_file: /etc/designate/private/bind3.conf rndc_host: 192.0.2.111 rndc_port: '953' type: bind9 - description: BIND9 Server 2 masters: - host: 192.0.2.137 port: 16001 - host: 192.0.2.137 port: 16002 - host: 192.0.2.137 port: 16000 options: host: 192.0.2.131 port: '53' rndc_config_file: /etc/designate/private/bind2.conf rndc_host: 192.0.2.131 rndc_port: '953' type: bind9 - description: BIND9 Server 1 masters: - host: 192.0.2.137 port: 16002 - host: 192.0.2.137 port: 16001 - host: 192.0.2.137 port: 16000 options: host: 192.0.2.109 port: '53' rndc_config_file: /etc/designate/private/bind1.conf rndc_host: 192.0.2.109 rndc_port: '953' type: bind9
ssh tripleo-admin@controller-0.ctlplane sudo podman exec designate_central designate-manage pool generate_file --file ~/my_dns_service_config.yaml
source ~/overcloudrc
openstack endpoint list --service designate -c Interface -c URL
+-----------+-------------------------+ | Interface | URL | +-----------+-------------------------+ | internal | http://172.17.1.44:9001 | | public | http://10.0.0.147:9001 | | admin | http://172.17.1.44:9001 | +-----------+-------------------------+