Chapter 28. Troubleshooting director errors Errors can occur at certain stages of the director processes. This section contains some information about diagnosing common problems. 28.1. Troubleshooting node registration Issues with node registration usually occur due to issues with incorrect node details. In these situations, validate the template file containing your node details and correct the imported node details. Procedure Source the stackrc file: Run the node import command with the --validate-only option. This option validates your node template without performing an import: To fix incorrect details with imported nodes, run the openstack baremetal commands to update node details. The following example shows how to change networking details: Identify the assigned port UUID for the imported node: Update the MAC address: Configure a new IPMI address on the node: 28.2. Troubleshooting hardware introspection The Bare Metal Provisioning inspector service, ironic-inspector , times out after a default one-hour period if the inspection RAM disk does not respond. The timeout might indicate a bug in the inspection RAM disk, but usually the timeout occurs due to an environment misconfiguration. You can diagnose and resolve common environment misconfiguration issues to ensure the introspection process runs to completion. Procedure Source the stackrc undercloud credentials file: Ensure that your nodes are in a manageable state. The introspection does not inspect nodes in an available state, which is meant for deployment. If you want to inspect nodes that are in an available state, change the node status to manageable state before introspection: To configure temporary access to the introspection RAM disk during introspection debugging, use the sshkey parameter to append your public SSH key to the kernel configuration in the /httpboot/inspector.ipxe file: Run the introspection on the node: Use the --provide option to change the node state to available after the introspection completes. Identify the IP address of the node from the dnsmasq logs: If an error occurs, access the node using the root user and temporary access details: Access the node during introspection to run diagnostic commands and troubleshoot the introspection failure. To stop the introspection process, run the following command: You can also wait until the process times out. Note Red Hat OpenStack Platform director retries introspection three times after the initial abort. Run the openstack baremetal introspection abort command at each attempt to abort the introspection completely. 28.3. Troubleshooting overcloud creation and deployment The initial creation of the overcloud occurs with the OpenStack Orchestration (heat) service. If an overcloud deployment fails, use the OpenStack clients and service log files to diagnose the failed deployment. Procedure Source the stackrc file: Run the deployment failures command: Run the following command to display the details of the failure: Replace <OVERCLOUD_NAME> with the name of your overcloud. Run the following command to identify the stacks that failed: 28.4. Troubleshooting node provisioning The OpenStack Orchestration (heat) service controls the provisioning process. If node provisioning fails, use the OpenStack clients and service log files to diagnose the issues. Procedure Source the stackrc file: Check the bare metal service to see all registered nodes and their current status: All nodes available for provisioning should have the following states set: Maintenance set to False . Provision State set to available before provisioning. If a node does not have Maintenance set to False or Provision State set to available , then use the following table to identify the problem and the solution: Problem Cause Solution Maintenance sets itself to True automatically. The director cannot access the power management for the nodes. Check the credentials for node power management. Provision State is set to available but nodes do not provision. The problem occurred before bare metal deployment started. Check the node details including the profile and flavor mapping. Check that the node hardware details are within the requirements for the flavor. Provision State is set to wait call-back for a node. The node provisioning process has not yet finished for this node. Wait until this status changes. Otherwise, connect to the virtual console of the node and check the output. Provision State is active and Power State is power on but the nodes do not respond. The node provisioning has finished successfully and there is a problem during the post-deployment configuration step. Diagnose the node configuration process. Connect to the virtual console of the node and check the output. Provision State is error or deploy failed . Node provisioning has failed. View the bare metal node details with the openstack baremetal node show command and check the last_error field, which contains error description. Additional resources Bare-metal node provisioning states 28.5. Troubleshooting IP address conflicts during provisioning Introspection and deployment tasks fail if the destination hosts are allocated an IP address that is already in use. To prevent these failures, you can perform a port scan of the Provisioning network to determine whether the discovery IP range and host IP range are free. Procedure Install nmap : Use nmap to scan the IP address range for active addresses. This example scans the 192.168.24.0/24 range, replace this with the IP subnet of the Provisioning network (using CIDR bitmask notation): Review the output of the nmap scan. For example, you should see the IP address of the undercloud, and any other hosts that are present on the subnet: If any of the active IP addresses conflict with the IP ranges in undercloud.conf, you must either change the IP address ranges or release the IP addresses before you introspect or deploy the overcloud nodes. 28.6. Troubleshooting "No Valid Host Found" errors Sometimes the /var/log/nova/nova-conductor.log contains the following error: This error occurs when the Compute Scheduler cannot find a bare metal node that is suitable for booting the new instance. This usually means that there is a mismatch between resources that the Compute service expects to find and resources that the Bare Metal service advertised to Compute. To check that there is a mismatch error, complete the following steps: Procedure Source the stackrc file: Check that the introspection succeeded on the node. If the introspection fails, check that each node contains the required ironic node properties: Check that the properties JSON field has valid values for keys cpus , cpu_arch , memory_mb and local_gb . Ensure that the Compute flavor that is mapped to the node does not exceed the node properties for the required number of nodes: Run the openstack baremetal node list command to ensure that there are sufficient nodes in the available state. Nodes in manageable state usually signify a failed introspection. Run the openstack baremetal node list command and ensure that the nodes are not in maintenance mode. If a node changes to maintenance mode automatically, the likely cause is an issue with incorrect power management credentials. Check the power management credentials and then remove maintenance mode: If you are using automatic profile tagging, check that you have enough nodes that correspond to each flavor and profile. Run the openstack baremetal node show command on a node and check the capabilities key in the properties field. For example, a node tagged for the Compute role contains the profile:compute value. You must wait for node information to propagate from Bare Metal to Compute after introspection. However, if you performed some steps manually, there might be a short period of time when nodes are not available to the Compute service (nova). Use the following command to check the total resources in your system: 28.7. Troubleshooting container configuration Red Hat OpenStack Platform director uses podman to manage containers and puppet to create container configuration. This procedure shows how to diagnose a container when errors occur. Accessing the host Source the stackrc file: Get the IP address of the node with the container failure. Log in to the node: Identifying failed containers View all containers: Identify the failed container. The failed container usually exits with a non-zero status. Checking container logs Each container retains standard output from its main process. Use this output as a log to help determine what actually occurs during a container run. For example, to view the log for the keystone container, run the following command: In most cases, this log contains information about the cause of a container failure. The host also retains the stdout log for the failed service. You can find the stdout logs in /var/log/containers/stdouts/ . For example, to view the log for a failed keystone container, run the following command: Inspecting containers In some situations, you might need to verify information about a container. For example, use the following command to view keystone container data: This command returns a JSON object containing low-level configuration data. You can pipe the output to the jq command to parse specific data. For example, to view the container mounts for the keystone container, run the following command: You can also use the --format option to parse data to a single line, which is useful for running commands against sets of container data. For example, to recreate the options used to run the keystone container, use the following inspect command with the --format option: Note The --format option uses Go syntax to create queries. Use these options in conjunction with the podman run command to recreate the container for troubleshooting purposes: Running commands in a container In some cases, you might need to obtain information from within a container through a specific Bash command. In this situation, use the following podman command to execute commands within a running container. For example, run the podman exec command to run a command inside the keystone container: Note The -ti options run the command through an interactive pseudoterminal. Replace <COMMAND> with the command you want to run. For example, each container has a health check script to verify the service connection. You can run the health check script for keystone with the following command: To access the container shell, run podman exec using /bin/bash as the command you want to run inside the container: Viewing a container filesystem To view the file system for the failed container, run the podman mount command. For example, to view the file system for a failed keystone container, run the following command: This provides a mounted location to view the filesystem contents: This is useful for viewing the Puppet reports within the container. You can find these reports in the var/lib/puppet/ directory within the container mount. Exporting a container When a container fails, you might need to investigate the full contents of the file. In this case, you can export the full file system of a container as a tar archive. For example, to export the keystone container file system, run the following command: This command creates the keystone.tar archive, which you can extract and explore. 28.8. Troubleshooting Compute node failures Compute nodes use the Compute service to perform hypervisor-based operations. This means the main diagnosis for Compute nodes revolves around this service. Procedure Source the stackrc file: Get the IP address of the Compute node that contains the failure: Log in to the node: Change to the root user: View the status of the container: The primary log file for Compute nodes is /var/log/containers/nova/nova-compute.log . If issues occur with Compute node communication, use this file to begin the diagnosis. If you perform maintenance on the Compute node, migrate the existing instances from the host to an operational Compute node, then disable the node. 28.9. Creating an sosreport If you need to contact Red Hat for support with Red Hat OpenStack Platform, you might need to generate an sosreport . For more information about creating an sosreport , see: "How to collect all required logs for Red Hat Support to investigate an OpenStack issue" 28.10. Log locations Use the following logs to gather information about the undercloud and overcloud when you troubleshoot issues. Table 28.1. Logs on both the undercloud and overcloud nodes Information Log location Containerized service logs /var/log/containers/ Standard output from containerized services /var/log/containers/stdouts Ansible configuration logs ~/ansible.log Table 28.2. Additional logs on the undercloud node Information Log location Command history for openstack overcloud deploy /home/stack/.tripleo/history Undercloud installation log /home/stack/install-undercloud.log Table 28.3. Additional logs on the overcloud nodes Information Log location Cloud-Init Log /var/log/cloud-init.log High availability log /var/log/pacemaker.log

Commands:
source ~/stackrc
(undercloud) USD openstack overcloud node import --validate-only ~/nodes.json Waiting for messages on queue 'tripleo' with no timeout. Successfully validated environment file
source ~/stackrc (undercloud) USD openstack baremetal port list --node [NODE UUID]
(undercloud) USD openstack baremetal port set --address=[NEW MAC] [PORT UUID]
(undercloud) USD openstack baremetal node set --driver-info ipmi_address=[NEW IPMI ADDRESS] [NODE UUID]
source ~/stackrc
(undercloud)USD openstack baremetal node manage <node_uuid>
kernel http://192.2.0.1:8088/agent.kernel ipa-inspection-callback-url=http://192.168.0.1:5050/v1/continue ipa-inspection-collectors=default,extra-hardware,logs systemd.journald.forward_to_console=yes BOOTIF=USD{mac} ipa-debug=1 ipa-inspection-benchmarks=cpu,mem,disk selinux=0 sshkey="<public_ssh_key>"
(undercloud)USD openstack overcloud node introspect <node_uuid> --provide
(undercloud)USD sudo tail -f /var/log/containers/ironic-inspector/dnsmasq.log
ssh root@192.168.24.105
(undercloud)USD openstack baremetal introspection abort <node_uuid>
source ~/stackrc
openstack overcloud failures
(undercloud) USD openstack stack failures list <OVERCLOUD_NAME> --long
(undercloud) USD openstack stack list --nested --property status=FAILED
source ~/stackrc
(undercloud) USD openstack baremetal node list +----------+------+---------------+-------------+-----------------+-------------+ | UUID | Name | Instance UUID | Power State | Provision State | Maintenance | +----------+------+---------------+-------------+-----------------+-------------+ | f1e261...| None | None | power off | available | False | | f0b8c1...| None | None | power off | available | False | +----------+------+---------------+-------------+-----------------+-------------+
sudo dnf install nmap
sudo nmap -sn 192.168.24.0/24
sudo nmap -sn 192.168.24.0/24 Starting Nmap 6.40 ( http://nmap.org ) at 2015-10-02 15:14 EDT Nmap scan report for 192.168.24.1 Host is up (0.00057s latency). Nmap scan report for 192.168.24.2 Host is up (0.00048s latency). Nmap scan report for 192.168.24.3 Host is up (0.00045s latency). Nmap scan report for 192.168.24.5 Host is up (0.00040s latency). Nmap scan report for 192.168.24.9 Host is up (0.00019s latency). Nmap done: 256 IP addresses (5 hosts up) scanned in 2.45 seconds
NoValidHost: No valid host was found. There are not enough hosts available.
source ~/stackrc
(undercloud) USD openstack baremetal node show [NODE UUID]
(undercloud) USD openstack flavor show [FLAVOR NAME]
(undercloud) USD openstack baremetal node maintenance unset [NODE UUID]
(undercloud) USD openstack hypervisor stats show
source ~/stackrc
(undercloud) USD metalsmith list
(undercloud) USD ssh tripleo-admin@192.168.24.60
sudo podman ps --all
sudo podman logs keystone
cat /var/log/containers/stdouts/keystone.log
sudo podman inspect keystone
sudo podman inspect keystone | jq .[0].Mounts
sudo podman inspect --format='{{range .Config.Env}} -e "{{.}}" {{end}} {{range .Mounts}} -v {{.Source}}:{{.Destination}}:{{ join .Options "," }}{{end}} -ti {{.Config.Image}}' keystone
OPTIONS=USD( sudo podman inspect --format='{{range .Config.Env}} -e "{{.}}" {{end}} {{range .Mounts}} -v {{.Source}}:{{.Destination}}{{if .Mode}}:{{.Mode}}{{end}}{{end}} -ti {{.Config.Image}}' keystone ) sudo podman run --rm USDOPTIONS /bin/bash
sudo podman exec -ti keystone <COMMAND>
sudo podman exec -ti keystone /openstack/healthcheck
sudo podman exec -ti keystone /bin/bash
sudo podman mount keystone
/var/lib/containers/storage/overlay/78946a109085aeb8b3a350fc20bd8049a08918d74f573396d7358270e711c610/merged
sudo podman export keystone -o keystone.tar
source ~/stackrc
(undercloud) USD openstack server list
(undercloud) USD ssh tripleo-admin@192.168.24.60
sudo -i
sudo podman ps -f name=nova_compute