$ mkdir -p ./out
You can use PolicyGenTemplate
CRs to deploy custom functionality in your managed clusters.
Using For more information about |
If you require cluster configuration changes outside of the base GitOps Zero Touch Provisioning (ZTP) pipeline configuration, there are three options:
When the GitOps ZTP pipeline deployment is complete, the deployed cluster is ready for application workloads. At this point, you can install additional Operators and apply configurations specific to your requirements. Ensure that additional configurations do not negatively affect the performance of the platform or allocated CPU budget.
The base source custom resources (CRs) that you deploy with the GitOps ZTP pipeline can be augmented with custom content as required.
Extra manifests are applied during installation and make the installation process more efficient.
Providing additional source CRs or modifying existing source CRs can significantly impact the performance or CPU profile of OpenShift Container Platform. |
PolicyGenTemplate
custom resources (CRs) allow you to overlay additional configuration details on top of the base source CRs provided with the GitOps plugin in the ztp-site-generate
container. You can think of PolicyGenTemplate
CRs as a logical merge or patch to the base CR. Use PolicyGenTemplate
CRs to update a single field of the base CR, or overlay the entire contents of the base CR. You can update values and insert fields that are not in the base CR.
The following example procedure describes how to update fields in the generated PerformanceProfile
CR for the reference configuration based on the PolicyGenTemplate
CR in the group-du-sno-ranGen.yaml
file. Use the procedure as a basis for modifying other parts of the PolicyGenTemplate
based on your requirements.
Create a Git repository where you manage your custom site configuration data. The repository must be accessible from the hub cluster and be defined as a source repository for Argo CD.
Review the baseline source CR for existing content. You can review the source CRs listed in the reference PolicyGenTemplate
CRs by extracting them from the GitOps Zero Touch Provisioning (ZTP) container.
Create an /out
folder:
$ mkdir -p ./out
Extract the source CRs:
$ podman run --log-driver=none --rm registry.redhat.io/openshift4/ztp-site-generate-rhel8:v4.16.1 extract /home/ztp --tar | tar x -C ./out
Review the baseline PerformanceProfile
CR in ./out/source-crs/PerformanceProfile.yaml
:
apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
name: $name
annotations:
ran.openshift.io/ztp-deploy-wave: "10"
spec:
additionalKernelArgs:
- "idle=poll"
- "rcupdate.rcu_normal_after_boot=0"
cpu:
isolated: $isolated
reserved: $reserved
hugepages:
defaultHugepagesSize: $defaultHugepagesSize
pages:
- size: $size
count: $count
node: $node
machineConfigPoolSelector:
pools.operator.machineconfiguration.openshift.io/$mcp: ""
net:
userLevelNetworking: true
nodeSelector:
node-role.kubernetes.io/$mcp: ''
numa:
topologyPolicy: "restricted"
realTimeKernel:
enabled: true
Any fields in the source CR which contain |
Update the PolicyGenTemplate
entry for PerformanceProfile
in the group-du-sno-ranGen.yaml
reference file. The following example PolicyGenTemplate
CR stanza supplies appropriate CPU specifications, sets the hugepages
configuration, and adds a new field that sets globallyDisableIrqLoadBalancing
to false.
- fileName: PerformanceProfile.yaml
policyName: "config-policy"
metadata:
name: openshift-node-performance-profile
spec:
cpu:
# These must be tailored for the specific hardware platform
isolated: "2-19,22-39"
reserved: "0-1,20-21"
hugepages:
defaultHugepagesSize: 1G
pages:
- size: 1G
count: 10
globallyDisableIrqLoadBalancing: false
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP argo CD application.
The GitOps ZTP application generates an RHACM policy that contains the generated PerformanceProfile
CR. The contents of that CR are derived by merging the metadata
and spec
contents from the PerformanceProfile
entry in the PolicyGenTemplate
onto the source CR. The resulting CR has the following content:
---
apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
name: openshift-node-performance-profile
spec:
additionalKernelArgs:
- idle=poll
- rcupdate.rcu_normal_after_boot=0
cpu:
isolated: 2-19,22-39
reserved: 0-1,20-21
globallyDisableIrqLoadBalancing: false
hugepages:
defaultHugepagesSize: 1G
pages:
- count: 10
size: 1G
machineConfigPoolSelector:
pools.operator.machineconfiguration.openshift.io/master: ""
net:
userLevelNetworking: true
nodeSelector:
node-role.kubernetes.io/master: ""
numa:
topologyPolicy: restricted
realTimeKernel:
enabled: true
In the An exception to this is the
The |
Perform the following procedure to add new content to the GitOps ZTP pipeline.
Create a subdirectory named source-crs
in the directory that contains the kustomization.yaml
file for the PolicyGenTemplate
custom resource (CR).
Add your user-provided CRs to the source-crs
subdirectory, as shown in the following example:
example
└── policygentemplates
├── dev.yaml
├── kustomization.yaml
├── mec-edge-sno1.yaml
├── sno.yaml
└── source-crs (1)
├── PaoCatalogSource.yaml
├── PaoSubscription.yaml
├── custom-crs
| ├── apiserver-config.yaml
| └── disable-nic-lldp.yaml
└── elasticsearch
├── ElasticsearchNS.yaml
└── ElasticsearchOperatorGroup.yaml
1 | The source-crs subdirectory must be in the same directory as the kustomization.yaml file. |
Update the required PolicyGenTemplate
CRs to include references to the content you added in the source-crs/custom-crs
and source-crs/elasticsearch
directories. For example:
apiVersion: ran.openshift.io/v1
kind: PolicyGenTemplate
metadata:
name: "group-dev"
namespace: "ztp-clusters"
spec:
bindingRules:
dev: "true"
mcp: "master"
sourceFiles:
# These policies/CRs come from the internal container Image
#Cluster Logging
- fileName: ClusterLogNS.yaml
remediationAction: inform
policyName: "group-dev-cluster-log-ns"
- fileName: ClusterLogOperGroup.yaml
remediationAction: inform
policyName: "group-dev-cluster-log-operator-group"
- fileName: ClusterLogSubscription.yaml
remediationAction: inform
policyName: "group-dev-cluster-log-sub"
#Local Storage Operator
- fileName: StorageNS.yaml
remediationAction: inform
policyName: "group-dev-lso-ns"
- fileName: StorageOperGroup.yaml
remediationAction: inform
policyName: "group-dev-lso-operator-group"
- fileName: StorageSubscription.yaml
remediationAction: inform
policyName: "group-dev-lso-sub"
#These are custom local polices that come from the source-crs directory in the git repo
# Performance Addon Operator
- fileName: PaoSubscriptionNS.yaml
remediationAction: inform
policyName: "group-dev-pao-ns"
- fileName: PaoSubscriptionCatalogSource.yaml
remediationAction: inform
policyName: "group-dev-pao-cat-source"
spec:
image: <container_image_url>
- fileName: PaoSubscription.yaml
remediationAction: inform
policyName: "group-dev-pao-sub"
#Elasticsearch Operator
- fileName: elasticsearch/ElasticsearchNS.yaml (1)
remediationAction: inform
policyName: "group-dev-elasticsearch-ns"
- fileName: elasticsearch/ElasticsearchOperatorGroup.yaml
remediationAction: inform
policyName: "group-dev-elasticsearch-operator-group"
#Custom Resources
- fileName: custom-crs/apiserver-config.yaml (1)
remediationAction: inform
policyName: "group-dev-apiserver-config"
- fileName: custom-crs/disable-nic-lldp.yaml
remediationAction: inform
policyName: "group-dev-disable-nic-lldp"
1 | Set fileName to include the relative path to the file from the /source-crs parent directory. |
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository that is monitored by the GitOps ZTP Argo CD policies application.
Update the ClusterGroupUpgrade
CR to include the changed PolicyGenTemplate
and save it as cgu-test.yaml
. The following example shows a generated cgu-test.yaml
file.
apiVersion: ran.openshift.io/v1alpha1
kind: ClusterGroupUpgrade
metadata:
name: custom-source-cr
namespace: ztp-clusters
spec:
managedPolicies:
- group-dev-config-policy
enable: true
clusters:
- cluster1
remediationStrategy:
maxConcurrency: 2
timeout: 240
Apply the updated ClusterGroupUpgrade
CR by running the following command:
$ oc apply -f cgu-test.yaml
Check that the updates have succeeded by running the following command:
$ oc get cgu -A
NAMESPACE NAME AGE STATE DETAILS
ztp-clusters custom-source-cr 6s InProgress Remediating non-compliant policies
ztp-install cluster1 19h Completed All clusters are compliant with all the managed policies
Use Red Hat Advanced Cluster Management (RHACM) installed on a hub cluster to monitor and report on whether your managed clusters are compliant with applied policies. RHACM uses policy templates to apply predefined policy controllers and policies. Policy controllers are Kubernetes custom resource definition (CRD) instances.
You can override the default policy evaluation intervals with PolicyGenTemplate
custom resources (CRs). You configure duration settings that define how long a ConfigurationPolicy
CR can be in a state of policy compliance or non-compliance before RHACM re-evaluates the applied cluster policies.
The GitOps Zero Touch Provisioning (ZTP) policy generator generates ConfigurationPolicy
CR policies with pre-defined policy evaluation intervals. The default value for the noncompliant
state is 10 seconds. The default value for the compliant
state is 10 minutes. To disable the evaluation interval, set the value to never
.
You have installed the OpenShift CLI (oc
).
You have logged in to the hub cluster as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data.
To configure the evaluation interval for all policies in a PolicyGenTemplate
CR, set appropriate compliant
and noncompliant
values for the evaluationInterval
field.
For example:
spec:
evaluationInterval:
compliant: 30m
noncompliant: 20s
You can also set |
To configure the evaluation interval for an individual policy object in a PolicyGenTemplate
CR, add the evaluationInterval
field and set appropriate values.
For example:
spec:
sourceFiles:
- fileName: SriovSubscription.yaml
policyName: "sriov-sub-policy"
evaluationInterval:
compliant: never
noncompliant: 10s
Commit the PolicyGenTemplate
CRs files in the Git repository and push your changes.
Check that the managed spoke cluster policies are monitored at the expected intervals.
Log in as a user with cluster-admin
privileges on the managed cluster.
Get the pods that are running in the open-cluster-management-agent-addon
namespace. Run the following command:
$ oc get pods -n open-cluster-management-agent-addon
NAME READY STATUS RESTARTS AGE
config-policy-controller-858b894c68-v4xdb 1/1 Running 22 (5d8h ago) 10d
Check the applied policies are being evaluated at the expected interval in the logs for the config-policy-controller
pod:
$ oc logs -n open-cluster-management-agent-addon config-policy-controller-858b894c68-v4xdb
2022-05-10T15:10:25.280Z info configuration-policy-controller controllers/configurationpolicy_controller.go:166 Skipping the policy evaluation due to the policy not reaching the evaluation interval {"policy": "compute-1-config-policy-config"}
2022-05-10T15:10:25.280Z info configuration-policy-controller controllers/configurationpolicy_controller.go:166 Skipping the policy evaluation due to the policy not reaching the evaluation interval {"policy": "compute-1-common-compute-1-catalog-policy-config"}
Create a validator inform policy that signals when the GitOps Zero Touch Provisioning (ZTP) installation and configuration of the deployed cluster is complete. This policy can be used for deployments of single-node OpenShift clusters, three-node clusters, and standard clusters.
Create a standalone PolicyGenTemplate
custom resource (CR) that contains the source file
validatorCRs/informDuValidator.yaml
. You only need one standalone PolicyGenTemplate
CR for each cluster type. For example, this CR applies a validator inform policy for single-node OpenShift clusters:
apiVersion: ran.openshift.io/v1
kind: PolicyGenTemplate
metadata:
name: "group-du-sno-validator" (1)
namespace: "ztp-group" (2)
spec:
bindingRules:
group-du-sno: "" (3)
bindingExcludedRules:
ztp-done: "" (4)
mcp: "master" (5)
sourceFiles:
- fileName: validatorCRs/informDuValidator.yaml
remediationAction: inform (6)
policyName: "du-policy" (7)
1 | The name of the {policy-gen-crs} object. This name is also used as part of the names
for the placementBinding , placementRule , and policy that are created in the requested namespace . |
2 | This value should match the namespace used in the group policy-gen-crs . |
3 | The group-du-* label defined in bindingRules must exist in the SiteConfig files. |
4 | The label defined in bindingExcludedRules must be`ztp-done:`. The ztp-done label is used in coordination with the Topology Aware Lifecycle Manager. |
5 | mcp defines the MachineConfigPool object that is used in the source file validatorCRs/informDuValidator.yaml . It should be master for single node and three-node cluster deployments and worker for standard cluster deployments. |
6 | Optional. The default value is inform . |
7 | This value is used as part of the name for the generated RHACM policy. The generated validator policy for the single node example is group-du-sno-validator-du-policy . |
Commit the PolicyGenTemplate
CR file in your Git repository and push the changes.
For low latency and high-performance edge deployments, it is necessary to disable or limit C-states and P-states. With this configuration, the CPU runs at a constant frequency, which is typically the maximum turbo frequency. This ensures that the CPU is always running at its maximum speed, which results in high performance and low latency. This leads to the best latency for workloads. However, this also leads to the highest power consumption, which might not be necessary for all workloads.
Workloads can be classified as critical or non-critical, with critical workloads requiring disabled C-state and P-state settings for high performance and low latency, while non-critical workloads use C-state and P-state settings for power savings at the expense of some latency and performance. You can configure the following three power states using GitOps Zero Touch Provisioning (ZTP):
High-performance mode provides ultra low latency at the highest power consumption.
Performance mode provides low latency at a relatively high power consumption.
Power saving balances reduced power consumption with increased latency.
The default configuration is for a low latency, performance mode.
PolicyGenTemplate
custom resources (CRs) allow you to overlay additional configuration details onto the base source CRs provided with the GitOps plugin in the ztp-site-generate
container.
Configure the power states by updating the workloadHints
fields in the generated PerformanceProfile
CR for the reference configuration, based on the PolicyGenTemplate
CR in the group-du-sno-ranGen.yaml
.
The following common prerequisites apply to configuring all three power states.
You have created a Git repository where you manage your custom site configuration data. The repository must be accessible from the hub cluster and be defined as a source repository for Argo CD.
You have followed the procedure described in "Preparing the GitOps ZTP site configuration repository".
Follow this example to set performance mode by updating the workloadHints
fields in the generated PerformanceProfile
CR for the reference configuration, based on the PolicyGenTemplate
CR in the group-du-sno-ranGen.yaml
.
Performance mode provides low latency at a relatively high power consumption.
You have configured the BIOS with performance related settings by following the guidance in "Configuring host firmware for low latency and high performance".
Update the PolicyGenTemplate
entry for PerformanceProfile
in the group-du-sno-ranGen.yaml
reference file in out/argocd/example/policygentemplates//
as follows to set performance mode.
- fileName: PerformanceProfile.yaml
policyName: "config-policy"
metadata:
# ...
spec:
# ...
workloadHints:
realTime: true
highPowerConsumption: false
perPodPowerManagement: false
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP Argo CD application.
Follow this example to set high performance mode by updating the workloadHints
fields in the generated PerformanceProfile
CR for the reference configuration, based on the PolicyGenTemplate
CR in the group-du-sno-ranGen.yaml
.
High performance mode provides ultra low latency at the highest power consumption.
You have configured the BIOS with performance related settings by following the guidance in "Configuring host firmware for low latency and high performance".
Update the PolicyGenTemplate
entry for PerformanceProfile
in the group-du-sno-ranGen.yaml
reference file in out/argocd/example/policygentemplates/
as follows to set high-performance mode.
- fileName: PerformanceProfile.yaml
policyName: "config-policy"
metadata:
# ...
spec:
# ...
workloadHints:
realTime: true
highPowerConsumption: true
perPodPowerManagement: false
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP Argo CD application.
Follow this example to set power saving mode by updating the workloadHints
fields in the generated PerformanceProfile
CR for the reference configuration, based on the PolicyGenTemplate
CR in the group-du-sno-ranGen.yaml
.
The power saving mode balances reduced power consumption with increased latency.
You enabled C-states and OS-controlled P-states in the BIOS.
Update the PolicyGenTemplate
entry for PerformanceProfile
in the group-du-sno-ranGen.yaml
reference file in out/argocd/example/policygentemplates/
as follows to configure power saving mode. It is recommended to configure the CPU governor for the power saving mode through the additional kernel arguments object.
- fileName: PerformanceProfile.yaml
policyName: "config-policy"
metadata:
# ...
spec:
# ...
workloadHints:
realTime: true
highPowerConsumption: false
perPodPowerManagement: true
# ...
additionalKernelArgs:
- # ...
- "cpufreq.default_governor=schedutil" (1)
1 | The schedutil governor is recommended, however, other governors that can be used include ondemand and powersave . |
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP Argo CD application.
Select a worker node in your deployed cluster from the list of nodes identified by using the following command:
$ oc get nodes
Log in to the node by using the following command:
$ oc debug node/<node-name>
Replace <node-name>
with the name of the node you want to verify the power state on.
Set /host
as the root directory within the debug shell. The debug pod mounts the host’s root file system in /host
within the pod. By changing the root directory to /host
, you can run binaries contained in the host’s executable paths as shown in the following example:
# chroot /host
Run the following command to verify the applied power state:
# cat /proc/cmdline
For power saving mode the intel_pstate=passive
.
Limiting the maximum CPU frequency is recommended to achieve maximum power savings. Enabling C-states on the non-critical workload CPUs without restricting the maximum CPU frequency negates much of the power savings by boosting the frequency of the critical CPUs.
Maximize power savings by updating the sysfs
plugin fields, setting an appropriate value for max_perf_pct
in the TunedPerformancePatch
CR for the reference configuration. This example based on the group-du-sno-ranGen.yaml
describes the procedure to follow to restrict the maximum CPU frequency.
You have configured power savings mode as described in "Using PolicyGenTemplate CRs to configure power savings mode".
Update the PolicyGenTemplate
entry for TunedPerformancePatch
in the group-du-sno-ranGen.yaml
reference file in out/argocd/example/policygentemplates/
. To maximize power savings, add max_perf_pct
as shown in the following example:
- fileName: TunedPerformancePatch.yaml
policyName: "config-policy"
spec:
profile:
- name: performance-patch
data: |
# ...
[sysfs]
/sys/devices/system/cpu/intel_pstate/max_perf_pct=<x> (1)
1 | The max_perf_pct controls the maximum frequency the cpufreq driver is allowed to set as a percentage of the maximum supported CPU frequency. This value applies to all CPUs. You can check the maximum supported frequency in /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq . As a starting point, you can use a percentage that caps all CPUs at the All Cores Turbo frequency. The All Cores Turbo frequency is the frequency that all cores will run at when the cores are all fully occupied. |
To maximize power savings, set a lower value. Setting a lower value for |
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP Argo CD application.
You can configure Logical Volume Manager (LVM) Storage for managed clusters that you deploy with GitOps Zero Touch Provisioning (ZTP).
You use LVM Storage to persist event subscriptions when you use PTP events or bare-metal hardware events with HTTP transport. Use the Local Storage Operator for persistent storage that uses local volumes in distributed units. |
Install the OpenShift CLI (oc
).
Log in as a user with cluster-admin
privileges.
Create a Git repository where you manage your custom site configuration data.
To configure LVM Storage for new managed clusters, add the following YAML to spec.sourceFiles
in the common-ranGen.yaml
file:
- fileName: StorageLVMOSubscriptionNS.yaml
policyName: subscription-policies
- fileName: StorageLVMOSubscriptionOperGroup.yaml
policyName: subscription-policies
- fileName: StorageLVMOSubscription.yaml
spec:
name: lvms-operator
channel: stable-4.16
policyName: subscription-policies
The Storage LVMO subscription is deprecated. In future releases of OpenShift Container Platform, the storage LVMO subscription will not be available. Instead, you must use the Storage LVMS subscription. In OpenShift Container Platform 4.16, you can use the Storage LVMS subscription instead of the LVMO subscription. The LVMS subscription does not require manual overrides in the
|
Add the LVMCluster
CR to spec.sourceFiles
in your specific group or individual site configuration file. For example, in the group-du-sno-ranGen.yaml
file, add the following:
- fileName: StorageLVMCluster.yaml
policyName: "lvms-config"
spec:
storage:
deviceClasses:
- name: vg1
thinPoolConfig:
name: thin-pool-1
sizePercent: 90
overprovisionRatio: 10
This example configuration creates a volume group (vg1
) with all the available devices, except the disk where OpenShift Container Platform is installed.
A thin-pool logical volume is also created.
Merge any other required changes and files with your custom site repository.
Commit the PolicyGenTemplate
changes in Git, and then push the changes to your site configuration repository to deploy LVM Storage to new sites using GitOps ZTP.
You can use the GitOps ZTP pipeline to configure PTP events that use HTTP or AMQP transport.
HTTP transport is the default transport for PTP and bare-metal events. Use HTTP transport instead of AMQP for PTP and bare-metal events where possible. AMQ Interconnect is EOL from 30 June 2024. Extended life cycle support (ELS) for AMQ Interconnect ends 29 November 2029. For more information see, Red Hat AMQ Interconnect support status. |
You can configure PTP events that use HTTP transport on managed clusters that you deploy with the GitOps Zero Touch Provisioning (ZTP) pipeline.
You have installed the OpenShift CLI (oc
).
You have logged in as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data.
Apply the following PolicyGenTemplate
changes to group-du-3node-ranGen.yaml
, group-du-sno-ranGen.yaml
, or group-du-standard-ranGen.yaml
files according to your requirements:
In spec.sourceFiles
, add the PtpOperatorConfig
CR file that configures the transport host:
- fileName: PtpOperatorConfigForEvent.yaml
policyName: "config-policy"
spec:
daemonNodeSelector: {}
ptpEventConfig:
enableEventPublisher: true
transportHost: http://ptp-event-publisher-service-NODE_NAME.openshift-ptp.svc.cluster.local:9043
In OpenShift Container Platform 4.13 or later, you do not need to set the |
Configure the linuxptp
and phc2sys
for the PTP clock type and interface. For example, add the following YAML into spec.sourceFiles
:
- fileName: PtpConfigSlave.yaml (1)
policyName: "config-policy"
metadata:
name: "du-ptp-slave"
spec:
profile:
- name: "slave"
interface: "ens5f1" (2)
ptp4lOpts: "-2 -s --summary_interval -4" (3)
phc2sysOpts: "-a -r -m -n 24 -N 8 -R 16" (4)
ptpClockThreshold: (5)
holdOverTimeout: 30 # seconds
maxOffsetThreshold: 100 # nano seconds
minOffsetThreshold: -100
1 | Can be one of PtpConfigMaster.yaml , PtpConfigSlave.yaml , or PtpConfigSlaveCvl.yaml depending on your requirements. PtpConfigSlaveCvl.yaml configures linuxptp services for an Intel E810 Columbiaville NIC. For configurations based on group-du-sno-ranGen.yaml or group-du-3node-ranGen.yaml , use PtpConfigSlave.yaml . |
2 | Device specific interface name. |
3 | You must append the --summary_interval -4 value to ptp4lOpts in .spec.sourceFiles.spec.profile to enable PTP fast events. |
4 | Required phc2sysOpts values. -m prints messages to stdout . The linuxptp-daemon DaemonSet parses the logs and generates Prometheus metrics. |
5 | Optional. If the ptpClockThreshold stanza is not present, default values are used for the ptpClockThreshold fields. The stanza shows default ptpClockThreshold values. The ptpClockThreshold values configure how long after the PTP master clock is disconnected before PTP events are triggered. holdOverTimeout is the time value in seconds before the PTP clock event state changes to FREERUN when the PTP master clock is disconnected. The maxOffsetThreshold and minOffsetThreshold settings configure offset values in nanoseconds that compare against the values for CLOCK_REALTIME (phc2sys ) or master offset (ptp4l ). When the ptp4l or phc2sys offset value is outside this range, the PTP clock state is set to FREERUN . When the offset value is within this range, the PTP clock state is set to LOCKED . |
Merge any other required changes and files with your custom site repository.
Push the changes to your site configuration repository to deploy PTP fast events to new sites using GitOps ZTP.
You can configure PTP events that use AMQP transport on managed clusters that you deploy with the GitOps Zero Touch Provisioning (ZTP) pipeline.
HTTP transport is the default transport for PTP and bare-metal events. Use HTTP transport instead of AMQP for PTP and bare-metal events where possible. AMQ Interconnect is EOL from 30 June 2024. Extended life cycle support (ELS) for AMQ Interconnect ends 29 November 2029. For more information see, Red Hat AMQ Interconnect support status. |
You have installed the OpenShift CLI (oc
).
You have logged in as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data.
Add the following YAML into spec.sourceFiles
in the common-ranGen.yaml
file to configure the AMQP Operator:
#AMQ interconnect operator for fast events
- fileName: AmqSubscriptionNS.yaml
policyName: "subscriptions-policy"
- fileName: AmqSubscriptionOperGroup.yaml
policyName: "subscriptions-policy"
- fileName: AmqSubscription.yaml
policyName: "subscriptions-policy"
Apply the following PolicyGenTemplate
changes to group-du-3node-ranGen.yaml
, group-du-sno-ranGen.yaml
, or group-du-standard-ranGen.yaml
files according to your requirements:
In spec.sourceFiles
, add the PtpOperatorConfig
CR file that configures the AMQ transport host to the config-policy
:
- fileName: PtpOperatorConfigForEvent.yaml
policyName: "config-policy"
spec:
daemonNodeSelector: {}
ptpEventConfig:
enableEventPublisher: true
transportHost: "amqp://amq-router.amq-router.svc.cluster.local"
Configure the linuxptp
and phc2sys
for the PTP clock type and interface. For example, add the following YAML into spec.sourceFiles
:
- fileName: PtpConfigSlave.yaml (1)
policyName: "config-policy"
metadata:
name: "du-ptp-slave"
spec:
profile:
- name: "slave"
interface: "ens5f1" (2)
ptp4lOpts: "-2 -s --summary_interval -4" (3)
phc2sysOpts: "-a -r -m -n 24 -N 8 -R 16" (4)
ptpClockThreshold: (5)
holdOverTimeout: 30 # seconds
maxOffsetThreshold: 100 # nano seconds
minOffsetThreshold: -100
1 | Can be one of PtpConfigMaster.yaml , PtpConfigSlave.yaml , or PtpConfigSlaveCvl.yaml depending on your requirements. PtpConfigSlaveCvl.yaml configures linuxptp services for an Intel E810 Columbiaville NIC. For configurations based on group-du-sno-ranGen.yaml or group-du-3node-ranGen.yaml , use PtpConfigSlave.yaml . |
2 | Device specific interface name. |
3 | You must append the --summary_interval -4 value to ptp4lOpts in .spec.sourceFiles.spec.profile to enable PTP fast events. |
4 | Required phc2sysOpts values. -m prints messages to stdout . The linuxptp-daemon DaemonSet parses the logs and generates Prometheus metrics. |
5 | Optional. If the ptpClockThreshold stanza is not present, default values are used for the ptpClockThreshold fields. The stanza shows default ptpClockThreshold values. The ptpClockThreshold values configure how long after the PTP master clock is disconnected before PTP events are triggered. holdOverTimeout is the time value in seconds before the PTP clock event state changes to FREERUN when the PTP master clock is disconnected. The maxOffsetThreshold and minOffsetThreshold settings configure offset values in nanoseconds that compare against the values for CLOCK_REALTIME (phc2sys ) or master offset (ptp4l ). When the ptp4l or phc2sys offset value is outside this range, the PTP clock state is set to FREERUN . When the offset value is within this range, the PTP clock state is set to LOCKED . |
Apply the following PolicyGenTemplate
changes to your specific site YAML files, for example, example-sno-site.yaml
:
In spec.sourceFiles
, add the Interconnect
CR file that configures the AMQ router to the config-policy
:
- fileName: AmqInstance.yaml
policyName: "config-policy"
Merge any other required changes and files with your custom site repository.
Push the changes to your site configuration repository to deploy PTP fast events to new sites using GitOps ZTP.
You can use the GitOps ZTP pipeline to configure bare-metal events that use HTTP or AMQP transport.
HTTP transport is the default transport for PTP and bare-metal events. Use HTTP transport instead of AMQP for PTP and bare-metal events where possible. AMQ Interconnect is EOL from 30 June 2024. Extended life cycle support (ELS) for AMQ Interconnect ends 29 November 2029. For more information see, Red Hat AMQ Interconnect support status. |
You can configure bare-metal events that use HTTP transport on managed clusters that you deploy with the GitOps Zero Touch Provisioning (ZTP) pipeline.
You have installed the OpenShift CLI (oc
).
You have logged in as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data.
Configure the Bare Metal Event Relay Operator by adding the following YAML to spec.sourceFiles
in the common-ranGen.yaml
file:
# Bare Metal Event Relay Operator
- fileName: BareMetalEventRelaySubscriptionNS.yaml
policyName: "subscriptions-policy"
- fileName: BareMetalEventRelaySubscriptionOperGroup.yaml
policyName: "subscriptions-policy"
- fileName: BareMetalEventRelaySubscription.yaml
policyName: "subscriptions-policy"
Add the HardwareEvent
CR to spec.sourceFiles
in your specific group configuration file, for example, in the group-du-sno-ranGen.yaml
file:
- fileName: HardwareEvent.yaml (1)
policyName: "config-policy"
spec:
nodeSelector: {}
transportHost: "http://hw-event-publisher-service.openshift-bare-metal-events.svc.cluster.local:9043"
logLevel: "info"
1 | Each baseboard management controller (BMC) requires a single HardwareEvent CR only. |
In OpenShift Container Platform 4.13 or later, you do not need to set the |
Merge any other required changes and files with your custom site repository.
Push the changes to your site configuration repository to deploy bare-metal events to new sites with GitOps ZTP.
Create the Redfish Secret by running the following command:
$ oc -n openshift-bare-metal-events create secret generic redfish-basic-auth \
--from-literal=username=<bmc_username> --from-literal=password=<bmc_password> \
--from-literal=hostaddr="<bmc_host_ip_addr>"
You can configure bare-metal events that use AMQP transport on managed clusters that you deploy with the GitOps Zero Touch Provisioning (ZTP) pipeline.
HTTP transport is the default transport for PTP and bare-metal events. Use HTTP transport instead of AMQP for PTP and bare-metal events where possible. AMQ Interconnect is EOL from 30 June 2024. Extended life cycle support (ELS) for AMQ Interconnect ends 29 November 2029. For more information see, Red Hat AMQ Interconnect support status. |
You have installed the OpenShift CLI (oc
).
You have logged in as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data.
To configure the AMQ Interconnect Operator and the Bare Metal Event Relay Operator, add the following YAML to spec.sourceFiles
in the common-ranGen.yaml
file:
# AMQ Interconnect Operator for fast events
- fileName: AmqSubscriptionNS.yaml
policyName: "subscriptions-policy"
- fileName: AmqSubscriptionOperGroup.yaml
policyName: "subscriptions-policy"
- fileName: AmqSubscription.yaml
policyName: "subscriptions-policy"
# Bare Metal Event Relay Operator
- fileName: BareMetalEventRelaySubscriptionNS.yaml
policyName: "subscriptions-policy"
- fileName: BareMetalEventRelaySubscriptionOperGroup.yaml
policyName: "subscriptions-policy"
- fileName: BareMetalEventRelaySubscription.yaml
policyName: "subscriptions-policy"
Add the Interconnect
CR to spec.sourceFiles
in the site configuration file, for example, the example-sno-site.yaml
file:
- fileName: AmqInstance.yaml
policyName: "config-policy"
Add the HardwareEvent
CR to spec.sourceFiles
in your specific group configuration file, for example, in the group-du-sno-ranGen.yaml
file:
- path: HardwareEvent.yaml
patches:
nodeSelector: {}
transportHost: "amqp://<amq_interconnect_name>.<amq_interconnect_namespace>.svc.cluster.local" (1)
logLevel: "info"
1 | The transportHost URL is composed of the existing AMQ Interconnect CR name and namespace . For example, in transportHost: "amqp://amq-router.amq-router.svc.cluster.local" , the AMQ Interconnect name and namespace are both set to amq-router . |
Each baseboard management controller (BMC) requires a single |
Commit the PolicyGenTemplate
change in Git, and then push the changes to your site configuration repository to deploy bare-metal events monitoring to new sites using GitOps ZTP.
Create the Redfish Secret by running the following command:
$ oc -n openshift-bare-metal-events create secret generic redfish-basic-auth \
--from-literal=username=<bmc_username> --from-literal=password=<bmc_password> \
--from-literal=hostaddr="<bmc_host_ip_addr>"
OpenShift Container Platform manages image caching using a local registry. In edge computing use cases, clusters are often subject to bandwidth restrictions when communicating with centralized image registries, which might result in long image download times.
Long download times are unavoidable during initial deployment. Over time, there is a risk that CRI-O will erase the /var/lib/containers/storage
directory in the case of an unexpected shutdown.
To address long image download times, you can create a local image registry on remote managed clusters using GitOps Zero Touch Provisioning (ZTP). This is useful in Edge computing scenarios where clusters are deployed at the far edge of the network.
Before you can set up the local image registry with GitOps ZTP, you need to configure disk partitioning in the SiteConfig
CR that you use to install the remote managed cluster. After installation, you configure the local image registry using a PolicyGenTemplate
CR. Then, the GitOps ZTP pipeline creates Persistent Volume (PV) and Persistent Volume Claim (PVC) CRs and patches the imageregistry
configuration.
The local image registry can only be used for user application images and cannot be used for the OpenShift Container Platform or Operator Lifecycle Manager operator images. |
Configure disk partitioning for a managed cluster using a SiteConfig
CR and GitOps Zero Touch Provisioning (ZTP). The disk partition details in the SiteConfig
CR must match the underlying disk.
You must complete this procedure at installation time. |
Install Butane.
Create the storage.bu
file.
variant: fcos
version: 1.3.0
storage:
disks:
- device: /dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0 (1)
wipe_table: false
partitions:
- label: var-lib-containers
start_mib: <start_of_partition> (2)
size_mib: <partition_size> (3)
filesystems:
- path: /var/lib/containers
device: /dev/disk/by-partlabel/var-lib-containers
format: xfs
wipe_filesystem: true
with_mount_unit: true
mount_options:
- defaults
- prjquota
1 | Specify the root disk. |
2 | Specify the start of the partition in MiB. If the value is too small, the installation fails. |
3 | Specify the size of the partition. If the value is too small, the deployments fails. |
Convert the storage.bu
to an Ignition file by running the following command:
$ butane storage.bu
{"ignition":{"version":"3.2.0"},"storage":{"disks":[{"device":"/dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0","partitions":[{"label":"var-lib-containers","sizeMiB":0,"startMiB":250000}],"wipeTable":false}],"filesystems":[{"device":"/dev/disk/by-partlabel/var-lib-containers","format":"xfs","mountOptions":["defaults","prjquota"],"path":"/var/lib/containers","wipeFilesystem":true}]},"systemd":{"units":[{"contents":"# # Generated by Butane\n[Unit]\nRequires=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\nAfter=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\n\n[Mount]\nWhere=/var/lib/containers\nWhat=/dev/disk/by-partlabel/var-lib-containers\nType=xfs\nOptions=defaults,prjquota\n\n[Install]\nRequiredBy=local-fs.target","enabled":true,"name":"var-lib-containers.mount"}]}}
Use a tool such as JSON Pretty Print to convert the output into JSON format.
Copy the output into the .spec.clusters.nodes.ignitionConfigOverride
field in the SiteConfig
CR.
[...]
spec:
clusters:
- nodes:
- ignitionConfigOverride: |
{
"ignition": {
"version": "3.2.0"
},
"storage": {
"disks": [
{
"device": "/dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0",
"partitions": [
{
"label": "var-lib-containers",
"sizeMiB": 0,
"startMiB": 250000
}
],
"wipeTable": false
}
],
"filesystems": [
{
"device": "/dev/disk/by-partlabel/var-lib-containers",
"format": "xfs",
"mountOptions": [
"defaults",
"prjquota"
],
"path": "/var/lib/containers",
"wipeFilesystem": true
}
]
},
"systemd": {
"units": [
{
"contents": "# # Generated by Butane\n[Unit]\nRequires=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\nAfter=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\n\n[Mount]\nWhere=/var/lib/containers\nWhat=/dev/disk/by-partlabel/var-lib-containers\nType=xfs\nOptions=defaults,prjquota\n\n[Install]\nRequiredBy=local-fs.target",
"enabled": true,
"name": "var-lib-containers.mount"
}
]
}
}
[...]
If the |
During or after installation, verify on the hub cluster that the BareMetalHost
object shows the annotation by running the following command:
$ oc get bmh -n my-sno-ns my-sno -ojson | jq '.metadata.annotations["bmac.agent-install.openshift.io/ignition-config-overrides"]
"{\"ignition\":{\"version\":\"3.2.0\"},\"storage\":{\"disks\":[{\"device\":\"/dev/disk/by-id/wwn-0x6b07b250ebb9d0002a33509f24af1f62\",\"partitions\":[{\"label\":\"var-lib-containers\",\"sizeMiB\":0,\"startMiB\":250000}],\"wipeTable\":false}],\"filesystems\":[{\"device\":\"/dev/disk/by-partlabel/var-lib-containers\",\"format\":\"xfs\",\"mountOptions\":[\"defaults\",\"prjquota\"],\"path\":\"/var/lib/containers\",\"wipeFilesystem\":true}]},\"systemd\":{\"units\":[{\"contents\":\"# Generated by Butane\\n[Unit]\\nRequires=systemd-fsck@dev-disk-by\\\\x2dpartlabel-var\\\\x2dlib\\\\x2dcontainers.service\\nAfter=systemd-fsck@dev-disk-by\\\\x2dpartlabel-var\\\\x2dlib\\\\x2dcontainers.service\\n\\n[Mount]\\nWhere=/var/lib/containers\\nWhat=/dev/disk/by-partlabel/var-lib-containers\\nType=xfs\\nOptions=defaults,prjquota\\n\\n[Install]\\nRequiredBy=local-fs.target\",\"enabled\":true,\"name\":\"var-lib-containers.mount\"}]}}"
After installation, check the single-node OpenShift disk status.
Enter into a debug session on the single-node OpenShift node by running the following command. This step instantiates a debug pod called <node_name>-debug
:
$ oc debug node/my-sno-node
Set /host
as the root directory within the debug shell by running the following command. The debug pod mounts the host’s root file system in /host
within the pod. By changing the root directory to /host
, you can run binaries contained in the host’s executable paths:
# chroot /host
List information about all available block devices by running the following command:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 446.6G 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 127M 0 part
├─sda3 8:3 0 384M 0 part /boot
├─sda4 8:4 0 243.6G 0 part /var
│ /sysroot/ostree/deploy/rhcos/var
│ /usr
│ /etc
│ /
│ /sysroot
└─sda5 8:5 0 202.5G 0 part /var/lib/containers
Display information about the file system disk space usage by running the following command:
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0M 0 4.0M 0% /dev
tmpfs 126G 84K 126G 1% /dev/shm
tmpfs 51G 93M 51G 1% /run
/dev/sda4 244G 5.2G 239G 3% /sysroot
tmpfs 126G 4.0K 126G 1% /tmp
/dev/sda5 203G 119G 85G 59% /var/lib/containers
/dev/sda3 350M 110M 218M 34% /boot
tmpfs 26G 0 26G 0% /run/user/1000
Use PolicyGenTemplate
(PGT) CRs to apply the CRs required to configure the image registry and patch the imageregistry
configuration.
You have configured a disk partition in the managed cluster.
You have installed the OpenShift CLI (oc
).
You have logged in to the hub cluster as a user with cluster-admin
privileges.
You have created a Git repository where you manage your custom site configuration data for use with GitOps Zero Touch Provisioning (ZTP).
Configure the storage class, persistent volume claim, persistent volume, and image registry configuration in the appropriate PolicyGenTemplate
CR. For example, to configure an individual site, add the following YAML to the file example-sno-site.yaml
:
sourceFiles:
# storage class
- fileName: StorageClass.yaml
policyName: "sc-for-image-registry"
metadata:
name: image-registry-sc
annotations:
ran.openshift.io/ztp-deploy-wave: "100" (1)
# persistent volume claim
- fileName: StoragePVC.yaml
policyName: "pvc-for-image-registry"
metadata:
name: image-registry-pvc
namespace: openshift-image-registry
annotations:
ran.openshift.io/ztp-deploy-wave: "100"
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 100Gi
storageClassName: image-registry-sc
volumeMode: Filesystem
# persistent volume
- fileName: ImageRegistryPV.yaml (2)
policyName: "pv-for-image-registry"
metadata:
annotations:
ran.openshift.io/ztp-deploy-wave: "100"
- fileName: ImageRegistryConfig.yaml
policyName: "config-for-image-registry"
complianceType: musthave
metadata:
annotations:
ran.openshift.io/ztp-deploy-wave: "100"
spec:
storage:
pvc:
claim: "image-registry-pvc"
1 | Set the appropriate value for ztp-deploy-wave depending on whether you are configuring image registries at the site, common, or group level. ztp-deploy-wave: "100" is suitable for development or testing because it allows you to group the referenced source files together. |
2 | In ImageRegistryPV.yaml , ensure that the spec.local.path field is set to /var/imageregistry to match the value set for the mount_point field in the SiteConfig CR. |
Do not set |
Commit the PolicyGenTemplate
change in Git, and then push to the Git repository being monitored by the GitOps ZTP ArgoCD application.
Use the following steps to troubleshoot errors with the local image registry on the managed clusters:
Verify successful login to the registry while logged in to the managed cluster. Run the following commands:
Export the managed cluster name:
$ cluster=<managed_cluster_name>
Get the managed cluster kubeconfig
details:
$ oc get secret -n $cluster $cluster-admin-password -o jsonpath='{.data.password}' | base64 -d > kubeadmin-password-$cluster
Download and export the cluster kubeconfig
:
$ oc get secret -n $cluster $cluster-admin-kubeconfig -o jsonpath='{.data.kubeconfig}' | base64 -d > kubeconfig-$cluster && export KUBECONFIG=./kubeconfig-$cluster
Verify access to the image registry from the managed cluster. See "Accessing the registry".
Check that the Config
CRD in the imageregistry.operator.openshift.io
group instance is not reporting errors. Run the following command while logged in to the managed cluster:
$ oc get image.config.openshift.io cluster -o yaml
apiVersion: config.openshift.io/v1
kind: Image
metadata:
annotations:
include.release.openshift.io/ibm-cloud-managed: "true"
include.release.openshift.io/self-managed-high-availability: "true"
include.release.openshift.io/single-node-developer: "true"
release.openshift.io/create-only: "true"
creationTimestamp: "2021-10-08T19:02:39Z"
generation: 5
name: cluster
resourceVersion: "688678648"
uid: 0406521b-39c0-4cda-ba75-873697da75a4
spec:
additionalTrustedCA:
name: acm-ice
Check that the PersistentVolumeClaim
on the managed cluster is populated with data. Run the following command while logged in to the managed cluster:
$ oc get pv image-registry-sc
Check that the registry*
pod is running and is located under the openshift-image-registry
namespace.
$ oc get pods -n openshift-image-registry | grep registry*
cluster-image-registry-operator-68f5c9c589-42cfg 1/1 Running 0 8d
image-registry-5f8987879-6nx6h 1/1 Running 0 8d
Check that the disk partition on the managed cluster is correct:
Open a debug shell to the managed cluster:
$ oc debug node/sno-1.example.com
Run lsblk
to check the host disk partitions:
sh-4.4# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 446.6G 0 disk
|-sda1 8:1 0 1M 0 part
|-sda2 8:2 0 127M 0 part
|-sda3 8:3 0 384M 0 part /boot
|-sda4 8:4 0 336.3G 0 part /sysroot
`-sda5 8:5 0 100.1G 0 part /var/imageregistry (1)
sdb 8:16 0 446.6G 0 disk
sr0 11:0 1 104M 0 rom
1 | /var/imageregistry indicates that the disk is correctly partitioned. |