$ curl -s -o /dev/null -I -w "%{http_code}\n" http://webserver.example.com:8080/rhcos-44.81.202004250133-0-qemu.<architecture>.qcow2.gz?sha256=7d884b46ee54fe87bbc3893bf2aa99af3b2d31f2e19ab5529c60636fbd0f1ce7
install-config.yaml
runtime network not ready
errorBefore troubleshooting the installation environment, it is critical to understand the overall flow of the installer-provisioned installation on bare metal. The following diagrams illustrate 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 Red Hat Enterprise Linux CoreOS (RHCOS) 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 an OpenShift Container Platform 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 installation program 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 OpenShift Container Platform 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 OpenShift Container Platform 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 Red Hat Enterprise Linux CoreOS (RHCOS) 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.<architecture>.qcow2.gz?sha256=7d884b46ee54fe87bbc3893bf2aa99af3b2d31f2e19ab5529c60636fbd0f1ce7
If the output is 200
, there is a valid response from the webserver storing the bootstrap VM image.
The OpenShift Container Platform installation program spawns a bootstrap node virtual machine, which handles provisioning the OpenShift Container Platform cluster nodes.
About 10 to 15 minutes after triggering the installation program, 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, verify libvirtd
is running on the system by executing the following command:
$ 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 an OpenShift Container Platform cluster without the |
After 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 the network connectivity between the provisioner and the provisioning
network bridge. This issue might occur if you are using a provisioning
network.
You cannot reach the bootstrap VM through 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 in to 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 RHCOS image. This scenario can arise due to:
A problem with the install-config.yaml
file.
Issues with out-of-band network access when using the baremetal network.
To verify the issue, there are three containers related to ironic
:
ironic
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
or ironic-inspector
. If you encounter an issue where the control plane nodes are not booting up from PXE, check the ironic
pod. The ironic
pod contains information 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 OpenShift Container Platform 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 RHCOS 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.<architecture>.qcow2.gz?sha256=9d999f55ff1d44f7ed7c106508e5deecd04dc3c06095d34d36bf1cd127837e0c
clusterOSImage: http://<ip:port>/rhcos-43.81.202001142154.0-openstack.<architecture>.qcow2.gz?sha256=a1bda656fa0892f7b936fdc6b6a6086bddaed5dafacedcd7a1e811abb78fe3b0
The coreos-downloader
container downloads resources from a webserver or from the external quay.io registry, whichever the install-config.yaml
configuration file specifies. Verify that the coreos-downloader
container is up and running and inspect its logs as needed.
Log in to the bootstrap VM:
$ ssh core@172.22.0.2
Check the status of the coreos-downloader
container within the bootstrap VM by running the following command:
[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 logs of the ironic
service, run the following command:
[core@localhost ~]$ sudo podman logs ironic
When the Kubernetes API is unavailable, check the control plane nodes to ensure that they are running the correct components. Also, check the hostname resolution.
Ensure that etcd
is running on each of the control plane nodes by running the following command:
$ sudo crictl logs $(sudo crictl ps --pod=$(sudo crictl pods --name=etcd-member --quiet) --quiet)
If the previous command fails, ensure that Kubelet created the etcd
pods by running the following command:
$ sudo crictl pods --name=etcd-member
If there are no pods, investigate etcd
.
Check the cluster nodes to ensure they have a fully qualified domain name, and not just localhost.localdomain
, by using the following command:
$ hostname
If a hostname is not set, set the correct hostname. For example:
$ sudo hostnamectl set-hostname <hostname>
Ensure that each node has the correct name resolution in the DNS server using the dig
command:
$ 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.
The installation program uses the Cluster Version Operator to create all the components of an OpenShift Container Platform cluster. When the installation program fails to initialize the cluster, you can retrieve the most important information from the ClusterVersion
and ClusterOperator
objects.
Inspect the ClusterVersion
object by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusterversion -o yaml
apiVersion: config.openshift.io/v1
kind: ClusterVersion
metadata:
creationTimestamp: 2019-02-27T22:24:21Z
generation: 1
name: version
resourceVersion: "19927"
selfLink: /apis/config.openshift.io/v1/clusterversions/version
uid: 6e0f4cf8-3ade-11e9-9034-0a923b47ded4
spec:
channel: stable-4.1
clusterID: 5ec312f9-f729-429d-a454-61d4906896ca
status:
availableUpdates: null
conditions:
- lastTransitionTime: 2019-02-27T22:50:30Z
message: Done applying 4.1.1
status: "True"
type: Available
- lastTransitionTime: 2019-02-27T22:50:30Z
status: "False"
type: Failing
- lastTransitionTime: 2019-02-27T22:50:30Z
message: Cluster version is 4.1.1
status: "False"
type: Progressing
- lastTransitionTime: 2019-02-27T22:24:31Z
message: 'Unable to retrieve available updates: unknown version 4.1.1
reason: RemoteFailed
status: "False"
type: RetrievedUpdates
desired:
image: registry.svc.ci.openshift.org/openshift/origin-release@sha256:91e6f754975963e7db1a9958075eb609ad226968623939d262d1cf45e9dbc39a
version: 4.1.1
history:
- completionTime: 2019-02-27T22:50:30Z
image: registry.svc.ci.openshift.org/openshift/origin-release@sha256:91e6f754975963e7db1a9958075eb609ad226968623939d262d1cf45e9dbc39a
startedTime: 2019-02-27T22:24:31Z
state: Completed
version: 4.1.1
observedGeneration: 1
versionHash: Wa7as_ik1qE=
View the conditions by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusterversion version \
-o=jsonpath='{range .status.conditions[*]}{.type}{" "}{.status}{" "}{.message}{"\n"}{end}'
Some of most important conditions include Failing
, Available
and Progressing
.
Available True Done applying 4.1.1
Failing False
Progressing False Cluster version is 4.0.0-0.alpha-2019-02-26-194020
RetrievedUpdates False Unable to retrieve available updates: unknown version 4.1.1
Inspect the ClusterOperator
object by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusteroperator
The command returns the status of the cluster Operators.
NAME VERSION AVAILABLE PROGRESSING FAILING SINCE
cluster-baremetal-operator True False False 17m
cluster-autoscaler True False False 17m
cluster-storage-operator True False False 10m
console True False False 7m21s
dns True False False 31m
image-registry True False False 9m58s
ingress True False False 10m
kube-apiserver True False False 28m
kube-controller-manager True False False 21m
kube-scheduler True False False 25m
machine-api True False False 17m
machine-config True False False 17m
marketplace-operator True False False 10m
monitoring True False False 8m23s
network True False False 13m
node-tuning True False False 11m
openshift-apiserver True False False 15m
openshift-authentication True False False 20m
openshift-cloud-credential-operator True False False 18m
openshift-controller-manager True False False 10m
openshift-samples True False False 8m42s
operator-lifecycle-manager True False False 17m
service-ca True False False 30m
Inspect individual cluster Operators by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusteroperator <operator> -oyaml (1)
1 | Replace <operator> with the name of a cluster Operator. This command is useful for identifying why an cluster Operator has not achieved the Available state or is in the Failed state. |
apiVersion: config.openshift.io/v1
kind: ClusterOperator
metadata:
creationTimestamp: 2019-02-27T22:47:04Z
generation: 1
name: monitoring
resourceVersion: "24677"
selfLink: /apis/config.openshift.io/v1/clusteroperators/monitoring
uid: 9a6a5ef9-3ae1-11e9-bad4-0a97b6ba9358
spec: {}
status:
conditions:
- lastTransitionTime: 2019-02-27T22:49:10Z
message: Successfully rolled out the stack.
status: "True"
type: Available
- lastTransitionTime: 2019-02-27T22:49:10Z
status: "False"
type: Progressing
- lastTransitionTime: 2019-02-27T22:49:10Z
status: "False"
type: Failing
extension: null
relatedObjects: null
version: ""
To get the cluster Operator’s status condition, run the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusteroperator <operator> \
-o=jsonpath='{range .status.conditions[*]}{.type}{" "}{.status}{" "}{.message}{"\n"}{end}'
Replace <operator>
with the name of one of the operators above.
Available True Successfully rolled out the stack
Progressing False
Failing False
To retrieve the list of objects owned by the cluster Operator, execute the following command:
oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusteroperator kube-apiserver \
-o=jsonpath='{.status.relatedObjects}'
[map[resource:kubeapiservers group:operator.openshift.io name:cluster] map[group: name:openshift-config resource:namespaces] map[group: name:openshift-config-managed resource:namespaces] map[group: name:openshift-kube-apiserver-operator resource:namespaces] map[group: name:openshift-kube-apiserver resource:namespaces]]
The installation program retrieves the URL for the OpenShift Container Platform console by using [route][route-object]
within the openshift-console
namespace. If the installation program fails the retrieve the URL for the console, use the following procedure.
Check if the console router is in the Available
or Failing
state by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get clusteroperator console -oyaml
apiVersion: config.openshift.io/v1
kind: ClusterOperator
metadata:
creationTimestamp: 2019-02-27T22:46:57Z
generation: 1
name: console
resourceVersion: "19682"
selfLink: /apis/config.openshift.io/v1/clusteroperators/console
uid: 960364aa-3ae1-11e9-bad4-0a97b6ba9358
spec: {}
status:
conditions:
- lastTransitionTime: 2019-02-27T22:46:58Z
status: "False"
type: Failing
- lastTransitionTime: 2019-02-27T22:50:12Z
status: "False"
type: Progressing
- lastTransitionTime: 2019-02-27T22:50:12Z
status: "True"
type: Available
- lastTransitionTime: 2019-02-27T22:46:57Z
status: "True"
type: Upgradeable
extension: null
relatedObjects:
- group: operator.openshift.io
name: cluster
resource: consoles
- group: config.openshift.io
name: cluster
resource: consoles
- group: oauth.openshift.io
name: console
resource: oauthclients
- group: ""
name: openshift-console-operator
resource: namespaces
- group: ""
name: openshift-console
resource: namespaces
versions: null
Manually retrieve the console URL by executing the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get route console -n openshift-console \
-o=jsonpath='{.spec.host}' console-openshift-console.apps.adahiya-1.devcluster.openshift.com
The installation program adds the default ingress certificate to the list of trusted client certificate authorities in ${INSTALL_DIR}/auth/kubeconfig
. If the installation program fails to add the ingress certificate to the kubeconfig
file, you can retrieve the certificate from the cluster and add it.
Retrieve the certificate from the cluster using the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig get configmaps default-ingress-cert \
-n openshift-config-managed -o=jsonpath='{.data.ca-bundle\.crt}'
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Add the certificate to the client-certificate-authority-data
field in the ${INSTALL_DIR}/auth/kubeconfig
file.
For added security, you cannot SSH into the cluster from outside the cluster by default. However, you can access control plane and worker nodes from the provisioner node. If you cannot SSH into the cluster nodes from the provisioner node, the nodes might be waiting on the bootstrap VM. The control plane nodes retrieve their boot configuration from the bootstrap VM, and they cannot boot successfully if they do not retrieve the boot configuration.
If you have physical access to the nodes, check their console output to determine if they have successfully booted. If the nodes are still retrieving their boot configuration, there might be problems with the bootstrap VM .
Ensure you have configured the sshKey: '<ssh_pub_key>'
setting in the install-config.yaml
file, where <ssh_pub_key>
is the public key of the kni
user on the provisioner node.
When OpenShift Container Platform 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 an OpenShift Container Platform 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 includes the rootDeviceHints
parameter 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
bootMACAddress: 24:6E:96:1B:96:90 # MAC of bootable provisioning NIC
The installation program does not provision worker nodes directly. Instead, the Machine API Operator scales nodes up and down on supported platforms. If worker nodes are not created after 15 to 20 minutes, depending on the speed of the cluster’s internet connection, investigate the Machine API Operator.
Check the Machine API Operator by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig \
--namespace=openshift-machine-api get deployments
If ${INSTALL_DIR}
is not set in your environment, replace the value with the name of the installation directory.
NAME READY UP-TO-DATE AVAILABLE AGE
cluster-autoscaler-operator 1/1 1 1 86m
cluster-baremetal-operator 1/1 1 1 86m
machine-api-controllers 1/1 1 1 85m
machine-api-operator 1/1 1 1 86m
Check the machine controller logs by running the following command:
$ oc --kubeconfig=${INSTALL_DIR}/auth/kubeconfig \
--namespace=openshift-machine-api logs deployments/machine-api-controllers \
--container=machine-controller
The Cluster Network Operator is responsible for deploying the networking components. It runs early in the installation process, after the control plane nodes have come up but before the installation program removes the bootstrap control plane. Issues with this Operator might indicate installation program issues.
Ensure the network configuration exists by running the following command:
$ oc get network -o yaml cluster
If it does not exist, the installation program did not create it. To find out why, run the following command:
$ openshift-install create manifests
Review the manifests to determine why the installation program did not create the network configuration.
Ensure the network is running by entering the following command:
$ oc get po -n openshift-network-operator
In some cases, the installation program will not be able to discover the new bare metal hosts and issue an error, because it cannot mount the remote virtual media share.
For example:
ProvisioningError 51s metal3-baremetal-controller Image provisioning failed: Deploy step deploy.deploy failed with BadRequestError: HTTP POST
https://<bmc_address>/redfish/v1/Managers/iDRAC.Embedded.1/VirtualMedia/CD/Actions/VirtualMedia.InsertMedia
returned code 400.
Base.1.8.GeneralError: A general error has occurred. See ExtendedInfo for more information
Extended information: [
{
"Message": "Unable to mount remote share https://<ironic_address>/redfish/boot-<uuid>.iso.",
"MessageArgs": [
"https://<ironic_address>/redfish/boot-<uuid>.iso"
],
"MessageArgs@odata.count": 1,
"MessageId": "IDRAC.2.5.RAC0720",
"RelatedProperties": [
"#/Image"
],
"RelatedProperties@odata.count": 1,
"Resolution": "Retry the operation.",
"Severity": "Informational"
}
].
In this situation, if you are using virtual media with an unknown certificate authority, you can configure your baseboard management controller (BMC) remote file share settings to trust an unknown certificate authority to avoid this error.
This resolution was tested on OpenShift Container Platform 4.11 with Dell iDRAC 9 and firmware version 5.10.50. |
Installer-provisioned clusters deploy with a DNS server that includes a DNS entry for the api-int.<cluster_name>.<base_domain>
URL. If the nodes within the cluster use an external or upstream DNS server to resolve the api-int.<cluster_name>.<base_domain>
URL and there is no such entry, worker nodes might fail to join the cluster. Ensure that all nodes in the cluster can resolve the domain name.
Add a DNS A/AAAA or CNAME record to internally identify the API load balancer. For example, when using dnsmasq, modify the dnsmasq.conf
configuration file:
$ sudo nano /etc/dnsmasq.conf
address=/api-int.<cluster_name>.<base_domain>/<IP_address>
address=/api-int.mycluster.example.com/192.168.1.10
address=/api-int.mycluster.example.com/2001:0db8:85a3:0000:0000:8a2e:0370:7334
Add a DNS PTR record to internally identify the API load balancer. For example, when using dnsmasq, modify the dnsmasq.conf
configuration file:
$ sudo nano /etc/dnsmasq.conf
ptr-record=<IP_address>.in-addr.arpa,api-int.<cluster_name>.<base_domain>
ptr-record=10.1.168.192.in-addr.arpa,api-int.mycluster.example.com
Restart the DNS server. For example, when using dnsmasq, execute the following command:
$ sudo systemctl restart dnsmasq
These records must be resolvable from all the nodes within the cluster.
In case of an earlier failed deployment, remove the artifacts from the failed attempt before trying to deploy OpenShift Container Platform again.
Power off all bare-metal nodes before installing the OpenShift Container Platform cluster by using the following command:
$ ipmitool -I lanplus -U <user> -P <password> -H <management_server_ip> power off
Remove all old bootstrap resources if any remain from an earlier deployment attempt by using the following script:
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
Delete the artifacts that the earlier installation generated by using the following command:
$ cd ; /bin/rm -rf auth/ bootstrap.ign master.ign worker.ign metadata.json \
.openshift_install.log .openshift_install_state.json
Re-create the OpenShift Container Platform manifests by using the following command:
$ ./openshift-baremetal-install --dir ~/clusterconfigs create manifests
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 installation program. 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 installation program 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: OVNKubernetes
If it does not exist, the installation program did not create it. To determine why the installation program 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 nodes, the Operator will perform leader election and all other Operators will sleep. For additional details, see Troubleshooting.
After you deploy a cluster, you might receive the following error message:
No disk found with matching rootDeviceHints
To address the No disk found with matching rootDeviceHints
error message, a temporary workaround is to change the rootDeviceHints
to minSizeGigabytes: 300
.
After you change the rootDeviceHints
settings, boot the CoreOS and then verify the disk information by using the following command:
$ udevadm info /dev/sda
If you are using DL360 Gen 10 servers, be aware that they have an SD-card slot that might be assigned the /dev/sda
device name. If no SD card is present in the server, it can cause conflicts. Ensure that the SD card slot is disabled in the server’s BIOS settings.
If the minSizeGigabytes
workaround is not fulfilling the requirements, you might need to revert rootDeviceHints
back to /dev/sda
. This change allows ironic images to boot successfully.
An alternative approach to fixing this problem is by using the serial ID of the disk. However, be aware that finding the serial ID can be challenging and might make the configuration file less readable. If you choose this path, ensure that you gather the serial ID using the previously documented command and incorporate it into your configuration.
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 OpenShift Container Platform node that was once part of a cluster deployment using a specific cluster name is still running but not part of the current OpenShift Container Platform 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 OpenShift Container Platform 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 OpenShift Container Platform 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 v1.28.5
master-1.cloud.example.com Ready master 135m v1.28.5
master-2.cloud.example.com Ready master 145m v1.28.5
worker-2.cloud.example.com Ready worker 100m v1.28.5
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 Butane config file including the contents of the chrony.conf
file to be delivered to the nodes. In the following example, create 99-master-chrony.bu
to add the file to the control plane nodes. You can modify the file for worker nodes or repeat this procedure for the worker role.
See "Creating machine configs with Butane" for information about Butane. |
variant: openshift
version: 4.15.0
metadata:
name: 99-master-chrony
labels:
machineconfiguration.openshift.io/role: master
storage:
files:
- path: /etc/chrony.conf
mode: 0644
overwrite: true
contents:
inline: |
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
1 | Replace <NTP_server> with the IP address of the NTP server. |
Use Butane to generate a MachineConfig
object file, 99-master-chrony.yaml
, containing the configuration to be delivered to the nodes:
$ butane 99-master-chrony.bu -o 99-master-chrony.yaml
Apply the MachineConfig
object file:
$ oc apply -f 99-master-chrony.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 installation program deployed the nodes and pods successfully.
When the OpenShift Container Platform 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 v1.28.5
master-1.example.com Ready master,worker 4h v1.28.5
master-2.example.com Ready master,worker 4h v1.28.5
Confirm the installation program 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