$ curl -s -o /dev/null -I -w "%{http_code}\n" http://webserver.example.com:8080/rhcos-44.81.202004250133-0-qemu.x86_64.qcow2.gz?sha256=7d884b46ee54fe87bbc3893bf2aa99af3b2d31f2e19ab5529c60636fbd0f1ce7
Prior to troubleshooting the installation environment, it is critical to understand the overall flow of the installer-provisioned installation on bare metal. The diagrams below provide a troubleshooting flow with a step-by-step breakdown for the environment.
Workflow 1 of 4 illustrates a troubleshooting workflow when the install-config.yaml
file has errors or the Fedora CoreOS (FCOS) images are inaccessible. Troubleshooting suggestions can be found at Troubleshooting install-config.yaml
.
Workflow 2 of 4 illustrates a troubleshooting workflow for bootstrap VM issues, bootstrap VMs that cannot boot up the cluster nodes, and inspecting logs. When installing a OKD cluster without the provisioning
network, this workflow does not apply.
Workflow 3 of 4 illustrates a troubleshooting workflow for cluster nodes that will not PXE boot. If installing using RedFish Virtual Media, each node must meet minimum firmware requirements for the installer to deploy the node. See Firmware requirements for installing with virtual media in the Prerequisites section for additional details.
Workflow 4 of 4 illustrates a troubleshooting workflow from a non-accessible API to a validated installation.
install-config.yaml
The install-config.yaml
configuration file represents all of the nodes that are part of the OKD cluster. The file contains the necessary options consisting of but not limited to apiVersion
, baseDomain
, imageContentSources
and virtual IP addresses. If errors occur early in the deployment of the OKD cluster, the errors are likely in the install-config.yaml
configuration file.
Use the guidelines in YAML-tips.
Verify the YAML syntax is correct using syntax-check.
Verify the Fedora CoreOS (FCOS) QEMU images are properly defined and accessible via the URL provided in the install-config.yaml
. For example:
$ curl -s -o /dev/null -I -w "%{http_code}\n" http://webserver.example.com:8080/rhcos-44.81.202004250133-0-qemu.x86_64.qcow2.gz?sha256=7d884b46ee54fe87bbc3893bf2aa99af3b2d31f2e19ab5529c60636fbd0f1ce7
If the output is 200
, there is a valid response from the webserver storing the bootstrap VM image.
The OKD installer spawns a bootstrap node virtual machine, which handles provisioning the OKD cluster nodes.
About 10 to 15 minutes after triggering the installer, check to ensure the bootstrap VM is operational using the virsh
command:
$ sudo virsh list
Id Name State
--------------------------------------------
12 openshift-xf6fq-bootstrap running
The name of the bootstrap VM is always the cluster name followed by a random set of characters and ending in the word "bootstrap." |
If the bootstrap VM is not running after 10-15 minutes, troubleshoot why it is not running. Possible issues include:
Verify libvirtd
is running on the system:
$ systemctl status libvirtd
● libvirtd.service - Virtualization daemon
Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2020-03-03 21:21:07 UTC; 3 weeks 5 days ago
Docs: man:libvirtd(8)
https://libvirt.org
Main PID: 9850 (libvirtd)
Tasks: 20 (limit: 32768)
Memory: 74.8M
CGroup: /system.slice/libvirtd.service
├─ 9850 /usr/sbin/libvirtd
If the bootstrap VM is operational, log in to it.
Use the virsh console
command to find the IP address of the bootstrap VM:
$ sudo virsh console example.com
Connected to domain example.com
Escape character is ^]
Red Hat Enterprise Linux CoreOS 43.81.202001142154.0 (Ootpa) 4.3
SSH host key: SHA256:BRWJktXZgQQRY5zjuAV0IKZ4WM7i4TiUyMVanqu9Pqg (ED25519)
SSH host key: SHA256:7+iKGA7VtG5szmk2jB5gl/5EZ+SNcJ3a2g23o0lnIio (ECDSA)
SSH host key: SHA256:DH5VWhvhvagOTaLsYiVNse9ca+ZSW/30OOMed8rIGOc (RSA)
ens3: fd35:919d:4042:2:c7ed:9a9f:a9ec:7
ens4: 172.22.0.2 fe80::1d05:e52e:be5d:263f
localhost login:
When deploying a OKD cluster without the |
Once you obtain the IP address, log in to the bootstrap VM using the ssh
command:
In the console output of the previous step, you can use the IPv6 IP address provided by |
$ ssh core@172.22.0.2
If you are not successful logging in to the bootstrap VM, you have likely encountered one of the following scenarios:
You cannot reach the 172.22.0.0/24
network. Verify network connectivity on the provisioner host specifically around the provisioning
network bridge. This will not be the issue if you are not using the provisioning
network.
You cannot reach the bootstrap VM via the public network. When attempting
to SSH via baremetal
network, verify connectivity on the
provisioner
host specifically around the baremetal
network bridge.
You encountered Permission denied (publickey,password,keyboard-interactive)
. When
attempting to access the bootstrap VM, a Permission denied
error
might occur. Verify that the SSH key for the user attempting to log
into the VM is set within the install-config.yaml
file.
During the deployment, it is possible for the bootstrap VM to fail to boot the cluster nodes, which prevents the VM from provisioning the nodes with the FCOS image. This scenario can arise due to:
A problem with the install-config.yaml
file.
Issues with out-of-band network access via the baremetal network.
To verify the issue, there are three containers related to ironic
:
ironic-api
ironic-conductor
ironic-inspector
Log in to the bootstrap VM:
$ ssh core@172.22.0.2
To check the container logs, execute the following:
[core@localhost ~]$ sudo podman logs -f <container-name>
Replace <container-name>
with one of ironic-api
, ironic-conductor
, or ironic-inspector
. If you encounter an issue where the control plane nodes are not booting up via PXE, check the ironic-conductor
pod. The ironic-conductor
pod contains the most detail about the attempt to boot the cluster nodes, because it attempts to log in to the node over IPMI.
The cluster nodes might be in the ON
state when deployment started.
Power off the OKD cluster nodes before you begin the installation over IPMI:
$ ipmitool -I lanplus -U root -P <password> -H <out-of-band-ip> power off
When experiencing issues downloading or accessing the FCOS images, first verify that the URL is correct in the install-config.yaml
configuration file.
bootstrapOSImage: http://<ip:port>/rhcos-43.81.202001142154.0-qemu.x86_64.qcow2.gz?sha256=9d999f55ff1d44f7ed7c106508e5deecd04dc3c06095d34d36bf1cd127837e0c
clusterOSImage: http://<ip:port>/rhcos-43.81.202001142154.0-openstack.x86_64.qcow2.gz?sha256=a1bda656fa0892f7b936fdc6b6a6086bddaed5dafacedcd7a1e811abb78fe3b0
The ipa-downloader
and coreos-downloader
containers download resources from a webserver or the external quay.io registry, whichever the install-config.yaml
configuration file specifies. Verify the following two containers are up and running and inspect their logs as needed:
ipa-downloader
coreos-downloader
Log in to the bootstrap VM:
$ ssh core@172.22.0.2
Check the status of the ipa-downloader
and coreos-downloader
containers within the bootstrap VM:
[core@localhost ~]$ sudo podman logs -f ipa-downloader
[core@localhost ~]$ sudo podman logs -f coreos-downloader
If the bootstrap VM cannot access the URL to the images, use the curl
command to verify that the VM can access the images.
To inspect the bootkube
logs that indicate if all the containers launched during the deployment phase, execute the following:
[core@localhost ~]$ journalctl -xe
[core@localhost ~]$ journalctl -b -f -u bootkube.service
Verify all the pods, including dnsmasq
, mariadb
, httpd
, and ironic
, are running:
[core@localhost ~]$ sudo podman ps
If there are issues with the pods, check the logs of the containers with issues. To check the log of the ironic-api
, execute the following:
[core@localhost ~]$ sudo podman logs <ironic-api>
When OKD cluster nodes will not PXE boot, execute the following checks on the cluster nodes that will not PXE boot. This procedure does not apply when installing a OKD cluster without the provisioning
network.
Check the network connectivity to the provisioning
network.
Ensure PXE is enabled on the NIC for the provisioning
network and PXE is disabled for all other NICs.
Verify that the install-config.yaml
configuration file has the proper hardware profile and boot MAC address for the NIC connected to the provisioning
network. For example:
bootMACAddress: 24:6E:96:1B:96:90 # MAC of bootable provisioning NIC hardwareProfile: default #control plane node settings
bootMACAddress: 24:6E:96:1B:96:90 # MAC of bootable provisioning NIC hardwareProfile: unknown #worker node settings
When the cluster is running and clients cannot access the API, domain name resolution issues might impede access to the API.
Hostname Resolution: Check the cluster nodes to ensure they have a fully qualified domain name, and not just localhost.localdomain
. For example:
$ hostname
If a hostname is not set, set the correct hostname. For example:
$ hostnamectl set-hostname <hostname>
Incorrect Name Resolution: Ensure that each node has the correct name resolution in the DNS server using dig
and nslookup
. For example:
$ dig api.<cluster-name>.example.com
; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el8 <<>> api.<cluster-name>.example.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37551
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 866929d2f8e8563582af23f05ec44203d313e50948d43f60 (good)
;; QUESTION SECTION:
;api.<cluster-name>.example.com. IN A
;; ANSWER SECTION:
api.<cluster-name>.example.com. 10800 IN A 10.19.13.86
;; AUTHORITY SECTION:
<cluster-name>.example.com. 10800 IN NS <cluster-name>.example.com.
;; ADDITIONAL SECTION:
<cluster-name>.example.com. 10800 IN A 10.19.14.247
;; Query time: 0 msec
;; SERVER: 10.19.14.247#53(10.19.14.247)
;; WHEN: Tue May 19 20:30:59 UTC 2020
;; MSG SIZE rcvd: 140
The output in the foregoing example indicates that the appropriate IP address for the api.<cluster-name>.example.com
VIP is 10.19.13.86
. This IP address should reside on the baremetal
network.
In the event of a previous failed deployment, remove the artifacts from the failed attempt before attempting to deploy OKD again.
Power off all bare metal nodes prior to installing the OKD cluster:
$ ipmitool -I lanplus -U <user> -P <password> -H <management-server-ip> power off
Remove all old bootstrap resources if any are left over from a previous deployment attempt:
for i in $(sudo virsh list | tail -n +3 | grep bootstrap | awk {'print $2'});
do
sudo virsh destroy $i;
sudo virsh undefine $i;
sudo virsh vol-delete $i --pool $i;
sudo virsh vol-delete $i.ign --pool $i;
sudo virsh pool-destroy $i;
sudo virsh pool-undefine $i;
done
Remove the following from the clusterconfigs
directory to prevent Terraform from failing:
$ rm -rf ~/clusterconfigs/auth ~/clusterconfigs/terraform* ~/clusterconfigs/tls ~/clusterconfigs/metadata.json
When creating a disconnected registry, you might encounter a "User Not Authorized" error when attempting to mirror the registry. This error might occur if you fail to append the new authentication to the existing pull-secret.txt
file.
Check to ensure authentication is successful:
$ /usr/local/bin/oc adm release mirror \
-a pull-secret-update.json
--from=$UPSTREAM_REPO \
--to-release-image=$LOCAL_REG/$LOCAL_REPO:${VERSION} \
--to=$LOCAL_REG/$LOCAL_REPO
Example output of the variables used to mirror the install images:
The values of |
After mirroring the registry, confirm that you can access it in your disconnected environment:
$ curl -k -u <user>:<password> https://registry.example.com:<registry-port>/v2/_catalog
{"repositories":["<Repo-Name>"]}
runtime network not ready
errorAfter the deployment of a cluster you might receive the following error:
`runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:Network plugin returns error: Missing CNI default network`
The Cluster Network Operator is responsible for deploying the networking components in response to a special object created by the installer. It runs very early in the installation process, after the control plane (master) nodes have come up, but before the bootstrap control plane has been torn down. It can be indicative of more subtle installer issues, such as long delays in bringing up control plane (master) nodes or issues with apiserver
communication.
Inspect the pods in the openshift-network-operator
namespace:
$ oc get all -n openshift-network-operator
NAME READY STATUS RESTARTS AGE
pod/network-operator-69dfd7b577-bg89v 0/1 ContainerCreating 0 149m
On the provisioner
node, determine that the network configuration exists:
$ kubectl get network.config.openshift.io cluster -oyaml
apiVersion: config.openshift.io/v1
kind: Network
metadata:
name: cluster
spec:
serviceNetwork:
- 172.30.0.0/16
clusterNetwork:
- cidr: 10.128.0.0/14
hostPrefix: 23
networkType: OpenShiftSDN
If it does not exist, the installer did not create it. To determine why the installer did not create it, execute the following:
$ openshift-install create manifests
Check that the network-operator
is running:
$ kubectl -n openshift-network-operator get pods
Retrieve the logs:
$ kubectl -n openshift-network-operator logs -l "name=network-operator"
On high availability clusters with three or more control plane (master) nodes, the Operator will perform leader election and all other Operators will sleep. For additional details, see Troubleshooting.
If the cluster nodes are not getting the correct IPv6 address over DHCP, check the following:
Ensure the reserved IPv6 addresses reside outside the DHCP range.
In the IP address reservation on the DHCP server, ensure the reservation specifies the correct DHCP Unique Identifier (DUID). For example:
# This is a dnsmasq dhcp reservation, 'id:00:03:00:01' is the client id and '18:db:f2:8c:d5:9f' is the MAC Address for the NIC
id:00:03:00:01:18:db:f2:8c:d5:9f,openshift-master-1,[2620:52:0:1302::6]
Ensure that route announcements are working.
Ensure that the DHCP server is listening on the required interfaces serving the IP address ranges.
During IPv6 deployment, cluster nodes must get their hostname over DHCP. Sometimes the NetworkManager
does not assign the hostname immediately. A control plane (master) node might report an error such as:
Failed Units: 2 NetworkManager-wait-online.service nodeip-configuration.service
This error indicates that the cluster node likely booted without first receiving a hostname from the DHCP server, which causes kubelet
to boot
with a localhost.localdomain
hostname. To address the error, force the node to renew the hostname.
Retrieve the hostname
:
[core@master-X ~]$ hostname
If the hostname is localhost
, proceed with the following steps.
Where |
Force the cluster node to renew the DHCP lease:
[core@master-X ~]$ sudo nmcli con up "<bare-metal-nic>"
Replace <bare-metal-nic>
with the wired connection corresponding to the baremetal
network.
Check hostname
again:
[core@master-X ~]$ hostname
If the hostname is still localhost.localdomain
, restart NetworkManager
:
[core@master-X ~]$ sudo systemctl restart NetworkManager
If the hostname is still localhost.localdomain
, wait a few minutes and check again. If the hostname remains localhost.localdomain
, repeat the previous steps.
Restart the nodeip-configuration
service:
[core@master-X ~]$ sudo systemctl restart nodeip-configuration.service
This service will reconfigure the kubelet
service with the correct hostname references.
Reload the unit files definition since the kubelet changed in the previous step:
[core@master-X ~]$ sudo systemctl daemon-reload
Restart the kubelet
service:
[core@master-X ~]$ sudo systemctl restart kubelet.service
Ensure kubelet
booted with the correct hostname:
[core@master-X ~]$ sudo journalctl -fu kubelet.service
If the cluster node is not getting the correct hostname over DHCP after the cluster is up and running, such as during a reboot, the cluster will have a pending csr
. Do not approve a csr
, or other issues might arise.
csr
Get CSRs on the cluster:
$ oc get csr
Verify if a pending csr
contains Subject Name: localhost.localdomain
:
$ oc get csr <pending_csr> -o jsonpath='{.spec.request}' | base64 --decode | openssl req -noout -text
Remove any csr
that contains Subject Name: localhost.localdomain
:
$ oc delete csr <wrong_csr>
During the installation process, it is possible to encounter a Virtual Router Redundancy Protocol (VRRP) conflict. This conflict might occur if a previously used OKD node that was once part of a cluster deployment using a specific cluster name is still running but not part of the current OKD cluster deployment using that same cluster name. For example, a cluster was deployed using the cluster name openshift
, deploying three control plane (master) nodes and three worker nodes. Later, a separate install uses the same cluster name openshift
, but this redeployment only installed three control plane (master) nodes, leaving the three worker nodes from a previous deployment in an ON
state. This might cause a Virtual Router Identifier (VRID) conflict and a VRRP conflict.
Get the route:
$ oc get route oauth-openshift
Check the service endpoint:
$ oc get svc oauth-openshift
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
oauth-openshift ClusterIP 172.30.19.162 <none> 443/TCP 59m
Attempt to reach the service from a control plane (master) node:
[core@master0 ~]$ curl -k https://172.30.19.162
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {
},
"status": "Failure",
"message": "forbidden: User \"system:anonymous\" cannot get path \"/\"",
"reason": "Forbidden",
"details": {
},
"code": 403
Identify the authentication-operator
errors from the provisioner
node:
$ oc logs deployment/authentication-operator -n openshift-authentication-operator
Event(v1.ObjectReference{Kind:"deployment", Namespace:"openshift-authentication-operator", Name:"authentication-operator", UID:"225c5bd5-b368-439b-9155-5fd3c0459d98", APIVersion:"apps/v1", ResourceVersion:"", FieldPath:""}): type: 'Normal' reason: 'OperatorStatusChanged' Status for clusteroperator/authentication changed: Degraded message changed from "IngressStateEndpointsDegraded: All 2 endpoints for oauth-server are reporting"
Ensure that the cluster name for every deployment is unique, ensuring no conflict.
Turn off all the rogue nodes which are not part of the cluster deployment that are using the same cluster name. Otherwise, the authentication pod of the OKD cluster might never start successfully.
During the Firstboot, the Ignition configuration may fail.
Connect to the node where the Ignition configuration failed:
Failed Units: 1
machine-config-daemon-firstboot.service
Restart the machine-config-daemon-firstboot
service:
[core@worker-X ~]$ sudo systemctl restart machine-config-daemon-firstboot.service
The deployment of OKD clusters depends on NTP synchronized clocks among the cluster nodes. Without synchronized clocks, the deployment may fail due to clock drift if the time difference is greater than two seconds.
Check for differences in the AGE
of the cluster nodes. For example:
$ oc get nodes
NAME STATUS ROLES AGE VERSION
master-0.cloud.example.com Ready master 145m v1.16.2
master-1.cloud.example.com Ready master 135m v1.16.2
master-2.cloud.example.com Ready master 145m v1.16.2
worker-2.cloud.example.com Ready worker 100m v1.16.2
Check for inconsistent timing delays due to clock drift. For example:
$ oc get bmh -n openshift-machine-api
master-1 error registering master-1 ipmi://<out-of-band-ip>
$ sudo timedatectl
Local time: Tue 2020-03-10 18:20:02 UTC
Universal time: Tue 2020-03-10 18:20:02 UTC
RTC time: Tue 2020-03-10 18:36:53
Time zone: UTC (UTC, +0000)
System clock synchronized: no
NTP service: active
RTC in local TZ: no
Create a chrony.conf
file and encode it as base64
string. For example:
$ cat << EOF | base 64
server <NTP-server> iburst(1)
stratumweight 0
driftfile /var/lib/chrony/drift
rtcsync
makestep 10 3
bindcmdaddress 127.0.0.1
bindcmdaddress ::1
keyfile /etc/chrony.keys
commandkey 1
generatecommandkey
noclientlog
logchange 0.5
logdir /var/log/chrony
EOF
1 | Replace <NTP-server> with the IP address of the NTP server. Copy the output. |
[text-in-base-64]
Create a MachineConfig
object, replacing the base64
string with
the [text-in-base-64]
string generated in the output of the previous step. The following example adds the file to the control plane (master) nodes. You can modify the file for worker nodes or make an additional machine config for the worker role.
$ cat << EOF > ./99_masters-chrony-configuration.yaml
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
creationTimestamp: null
labels:
machineconfiguration.openshift.io/role: master
name: 99-master-etc-chrony-conf
spec:
config:
ignition:
config: {}
security:
tls: {}
timeouts: {}
version: 3.1.0
networkd: {}
passwd: {}
storage:
files:
- contents:
source: data:text/plain;charset=utf-8;base64,[text-in-base-64](1)
group:
name: root
mode: 420
overwrite: true
path: /etc/chrony.conf
user:
name: root
osImageURL: ""
1 | Replace [text-in-base-64] with the base64 string. |
Make a backup copy of the configuration file. For example:
$ cp 99_masters-chrony-configuration.yaml 99_masters-chrony-configuration.yaml.backup
Apply the configuration file:
$ oc apply -f ./masters-chrony-configuration.yaml
Ensure the System clock synchronized
value is yes:
$ sudo timedatectl
Local time: Tue 2020-03-10 19:10:02 UTC
Universal time: Tue 2020-03-10 19:10:02 UTC
RTC time: Tue 2020-03-10 19:36:53
Time zone: UTC (UTC, +0000)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
To setup clock synchronization prior to deployment, generate the manifest files and add this file to the openshift
directory. For example:
$ cp chrony-masters.yaml ~/clusterconfigs/openshift/99_masters-chrony-configuration.yaml
Then, continue to create the cluster.
After installation, ensure the installer deployed the nodes and pods successfully.
When the OKD cluster nodes are installed appropriately, the following Ready
state is seen within the STATUS
column:
$ oc get nodes
NAME STATUS ROLES AGE VERSION
master-0.example.com Ready master,worker 4h v1.16.2
master-1.example.com Ready master,worker 4h v1.16.2
master-2.example.com Ready master,worker 4h v1.16.2
Confirm the installer deployed all pods successfully. The following command removes any pods that are still running or have completed as part of the output.
$ oc get pods --all-namespaces | grep -iv running | grep -iv complete