FAQ

How do I find out all Deckhouse parameters?

Deckhouse is configured using global settings, module settings, and various custom resources. Read more in the documentation.

To view global Deckhouse settings:

kubectl get mc global -o yaml

To list the status of all modules (available for Deckhouse version 1.47+):

kubectl get modules

To get the user-authn module configuration:

kubectl get moduleconfigs user-authn -o yaml

How do I find the documentation for the version installed?

The documentation for the Deckhouse version running in the cluster is available at documentation.<cluster_domain>, where <cluster_domain> is the DNS name that matches the template defined in the modules.publicDomainTemplate parameter.

Deckhouse update

How to find out in which mode the cluster is being updated?

You can view the cluster update mode in the configuration of the deckhouse module. To do this, run the following command:

kubectl get mc deckhouse -oyaml

Example of the output:

apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  creationTimestamp: "2022-12-14T11:13:03Z"
  generation: 1
  name: deckhouse
  resourceVersion: "3258626079"
  uid: c64a2532-af0d-496b-b4b7-eafb5d9a56ee
spec:
  settings:
    releaseChannel: Stable
    update:
      windows:
      - days:
        - Mon
        from: "19:00"
        to: "20:00"
  version: 1
status:
  state: Enabled
  status: ""
  type: Embedded
  version: "1"

There are three possible update modes:

• Automatic + update windows are not set. The cluster will be updated after the new version appears on the corresponding release channel.
• Automatic + update windows are set. The cluster will be updated in the nearest available window after the new version appears on the release channel.
• Manual. Manual action is required to apply the update.

How do I set the desired release channel?

Change (set) the releaseChannel parameter in the deckhouse module configuration to automatically switch to another release channel.

It will activate the mechanism of automatic stabilization of the release channel.

Here is an example of the deckhouse module configuration with the Stable release channel:

apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  name: deckhouse
spec:
  version: 1
  settings:
    releaseChannel: Stable

How do I disable automatic updates?

To completely disable the Deckhouse update mechanism, remove the releaseChannel parameter in the deckhouse module configuration.

In this case, Deckhouse does not check for updates and even doesn’t apply patch releases.

How to understand what changes the update contains and how it will affect the cluster?

You can find all the information about Deckhouse versions in the list of Deckhouse releases.

Summary information about important changes, component version updates, and which components in the cluster will be restarted during the update process can be found in the description of the zero patch version of the release. For example, v1.46.0 for the v1.46 Deckhouse release.

A detailed list of changes can be found in the Changelog, which is referenced in each release.

How do I understand that the cluster is being updated?

During the update:

• The DeckhouseUpdating alert is firing.
• The deckhouse Pod is not the Ready status. If the Pod does not go to the Ready status for a long time, then this may indicate that there are problems in the work of Deckhouse. Diagnosis is necessary.

How do I know that the update was successful?

If the DeckhouseUpdating alert is resolved, then the update is complete.

You can also check the status of Deckhouse releases.

An example:

$ kubectl get deckhouserelease
NAME       PHASE        TRANSITIONTIME   MESSAGE
v1.46.8    Superseded   13d              
v1.46.9    Superseded   11d              
v1.47.0    Superseded   4h12m            
v1.47.1    Deployed     4h12m            

The Deployed status of the corresponding version indicates that the switch to the corresponding version was performed (but this does not mean that it ended successfully).

Check the status of the Deckhouse Pod:

$ kubectl -n d8-system get pods -l app=deckhouse
NAME                   READY  STATUS   RESTARTS  AGE
deckhouse-7844b47bcd-qtbx9  1/1   Running  0       1d

• If the status of the Pod is Running, and 1/1 indicated in the READY column, the update was completed successfully.
• If the status of the Pod is Running, and 0/1 indicated in the READY column, the update is not over yet. If this goes on for more than 20-30 minutes, then this may indicate that there are problems in the work of Deckhouse. Diagnosis is necessary.
• If the status of the Pod is not Running, then this may indicate that there are problems in the work of Deckhouse. Diagnosis is necessary.

How do I know that a new version is available for the cluster?

As soon as a new version of Deckhouse appears on the release channel installed in the cluster:

• The alert DeckhouseReleaseIsWaitingManualApproval fires, if the cluster uses manual update mode (the update.mode parameter is set to Manual).
• There is a new custom resource DeckhouseRelease. Use the kubectl get deckhousereleases command, to view the list of releases. If the DeckhouseRelease is in the Pending state, the specified version has not yet been installed. Possible reasons why DeckhouseRelease may be in Pending:
  • Manual update mode is set (the update.mode parameter is set to Manual).
  • The automatic update mode is set, and the update windows are configured, the interval of which has not yet come.
  • The automatic update mode is set, update windows are not configured, but the installation of the version has been postponed for a random time due to the mechanism of reducing the load on the repository of container images. There will be a corresponding message in the status.message field of the DeckhouseRelease resource.
  • The update.notification.minimalNotificationTime parameter is set, and the specified time has not passed yet.

How do I get information about the upcoming update in advance?

You can get information in advance about updating minor versions of Deckhouse on the release channel in the following ways:

• Configure manual update mode. In this case, when a new version appears on the release channel, the alert DeckhouseReleaseIsWaitingManualApproval will fire and a new custom resource DeckhouseRelease will appear in the cluster.
• Configure automatic update mode and specify the minimum time in the minimalNotificationTime parameter for which the update will be postponed. In this case, when a new version appears on the release channel, a new custom resource DeckhouseRelease will appear in the cluster. And if you specify a URL in the update.notification.webhook parameter, then the webhook will be called additionally.

How do I find out which version of Deckhouse is on which release channel?

Information about which version of Deckhouse is on which release channel can be obtained at https://flow.deckhouse.io.

How does automatic Deckhouse update work?

Every minute Deckhouse checks a new release appeared in the release channel specified by the releaseChannel parameter.

When a new release appears on the release channel, Deckhouse downloads it and creates CustomResource DeckhouseRelease.

After creating a DeckhouseRelease custom resource in a cluster, Deckhouse updates the deckhouse Deployment and sets the image tag to a specified release tag according to selected update mode and update windows (automatic at any time by default).

To get list and status of all releases use the following command:

kubectl get deckhousereleases

What happens when the release channel changes?

• When switching to a more stable release channel (e.g., from Alpha to EarlyAccess), Deckhouse downloads release data from the release channel (the EarlyAccess release channel in the example) and compares it with the existing DeckhouseReleases:
  • Deckhouse deletes later releases (by semver) that have not yet been applied (with the Pending status).
  • if the latest releases have been already Deployed, then Deckhouse will hold the current release until a later release appears on the release channel (on the EarlyAccess release channel in the example).
• When switching to a less stable release channel (e.g., from EarlyAcess to Alpha), the following actions take place:
  • Deckhouse downloads release data from the release channel (the Alpha release channel in the example) and compares it with the existing DeckhouseReleases.
  • Then Deckhouse performs the update according to the update parameters.

What do I do if Deckhouse fails to retrieve updates from the release channel?

• Make sure that the desired release channel is configured.

• Make sure that the DNS name of the Deckhouse container registry is resolved correctly.

  Retrieve and compare the IP addresses of the Deckhouse container registry (registry.deckhouse.io) on one of the nodes and in the Deckhouse pod. They should match.

  Here is how you can retrieve the IP address of the Deckhouse container registry on a node:

  $ getent ahosts registry.deckhouse.io
  46.4.145.194    STREAM registry.deckhouse.io
  46.4.145.194    DGRAM
  46.4.145.194    RAW
  

  Here is how you can retrieve the IP address of the Deckhouse container registry in a pod:

  $ kubectl -n d8-system exec -ti deploy/deckhouse -c deckhouse -- getent ahosts registry.deckhouse.io
  46.4.145.194    STREAM registry.deckhouse.io
  46.4.145.194    DGRAM  registry.deckhouse.io
  

  If the retrieved IP addresses do not match, inspect the DNS settings on the host. Specifically, check the list of domains in the search parameter of the /etc/resolv.conf file (it affects name resolution in the Deckhouse pod). If the search parameter of the /etc/resolv.conf file includes a domain where wildcard record resolution is configured, it may result in incorrect resolution of the IP address of the Deckhouse container registry (see example).

Air-gapped environment; working via proxy and third-party registry

How do I configure Deckhouse to use a third-party registry?

Deckhouse can be configured to work with a third-party registry (e.g., a proxy registry inside private environments).

Define the following parameters in the InitConfiguration resource:

• imagesRepo: <PROXY_REGISTRY>/<DECKHOUSE_REPO_PATH>/ee. The path to the Deckhouse EE image in the third-party registry, for example imagesRepo: registry.deckhouse.io/deckhouse/ee;
• registryDockerCfg: <BASE64>. Base64-encoded auth credentials of the third-party registry.

Use the following registryDockerCfg if anonymous access to Deckhouse images is allowed in the third-party registry:

{"auths": { "<PROXY_REGISTRY>": {}}}

registryDockerCfg must be Base64-encoded.

Use the following registryDockerCfg if authentication is required to access Deckhouse images in the third-party registry:

{"auths": { "<PROXY_REGISTRY>": {"username":"<PROXY_USERNAME>","password":"<PROXY_PASSWORD>","auth":"<AUTH_BASE64>"}}}

• <PROXY_USERNAME> — auth username for <PROXY_REGISTRY>.
• <PROXY_PASSWORD> — auth password for <PROXY_REGISTRY>.
• <PROXY_REGISTRY> — registry address: <HOSTNAME>[:PORT].
• <AUTH_BASE64> — Base64-encoded <PROXY_USERNAME>:<PROXY_PASSWORD> auth string.

registryDockerCfg must be Base64-encoded.

The InitConfiguration resource provides two more parameters for non-standard third-party registry configurations:

• registryCA - root CA certificate to validate the third-party registry’s HTTPS certificate (if self-signed certificates are used);
• registryScheme - registry scheme (HTTP or HTTPS). The default value is HTTPS.

Tips for configuring Nexus

The following requirements must be met if the Nexus repository manager is used:

• Docker Bearer Token Realm must be enabled.
• Docker proxy repository must be pre-created.
• Allow anonymous docker pull must be enabled.
• Access control must be configured as follows:
  • The Nexus role with the nx-repository-view-docker-<repo>-browse and nx-repository-view-docker-<repo>-read permissions must be created.
  • The Nexus user must be created with the above role granted.
• Maximum metadata age for the created repository must be set to 0.

Configuration:

• Enable Docker Bearer Token Realm:

• Create a docker proxy repository pointing to the Deckhouse registry:

• Fill in the fields on the Create page as follows:
  • Name must contain the name of the repository you created earlier, e.g., d8-proxy.
  • Repository Connectors / HTTP or Repository Connectors / HTTPS must contain a dedicated port for the created repository, e.g., 8123 or other.
  • Allow anonymous docker pull must be enabled for the Bearer token authentication to work. Note, however, that anonymous access won’t work unless it is explicitly enabled in Settings -> Security -> Anonymous Access and the anonymous user has been granted access rights to the created repository.
  • Remote storage must be set to https://registry.deckhouse.io/.
  • You can disable Auto blocking enabled and Not found cache enabled for debugging purposes, otherwise they must be enabled.
  • Maximum Metadata Age must be set to 0.
  • Authentication must be enabled if you plan to use Deckhouse Enterprise Edition and the related fields must be set as follows:
    • Authentication Type must be set to Username.
    • Username must be set to license-token.
    • Password must contain your license key for Deckhouse Enterprise Edition.

  

• Configure Nexus access control to allow Nexus access to the created repository:

  • Create a Nexus role with the nx-repository-view-docker-<repo>-browse and nx-repository-view-docker-<repo>-read permissions.

    

  • Create a Nexus user with the role above granted.

    

Tips for configuring Harbor

You need to use the Proxy Cache feature of a Harbor.

• Create a Registry:
  • Administration -> Registries -> New Endpoint.
  • Provider: Docker Registry.
  • Name — specify any of your choice.
  • Endpoint URL: https://registry.deckhouse.io.
  • Specify the Access ID and Access Secret for Deckhouse Enterprise Edition.

  

• Create a new Project:
  • Projects -> New Project.
  • Project Name will be used in the URL. You can choose any name, for example, d8s.
  • Access Level: Public.
  • Proxy Cache — enable and choose the Registry, created in the previous step.

  

Thus, Deckhouse images will be available at https://your-harbor.com/d8s/deckhouse/ee:{d8s-version}.

Manually uploading images to an air-gapped registry

1. If necessary, log in to the container registry registry.deckhouse.io using your license key.

   docker login -u license-token registry.deckhouse.io
   

2. Run the Deckhouse installer version 1.54.3 or higher.

   docker run -ti --pull=always -v $(pwd)/d8-images:/tmp/d8-images registry.deckhouse.io/deckhouse/ee/install:v1.54.3 bash
   

   Note that the directory on the host will be mounted in the installer container. This directory will contain the pulled Deckhouse tarball.

3. Pull Deckhouse images using the dhctl mirror command.

   dhctl mirror pulls only the latest available patch versions of a minor Deckhouse release. For example, for Deckhouse 1.52, only one version, 1.52.10, will be pulled, as it is sufficient to update Deckhouse from version 1.51.

   The command below will pull Deckhouse tarballs for versions that are on the release channels (check flow.deckhouse.io for the current status of the release channels):

   dhctl mirror --license="<DECKHOUSE_LICENSE_KEY>" --images-bundle-path /tmp/d8-images/d8.tar
   

   To pull all Deckhouse images starting from a particular version, specify it in the --min-version parameter in the X.Y format.

   For example, here is how you can pull all Deckhouse version images starting from version 1.45:

   dhctl mirror --license="<DECKHOUSE_LICENSE_KEY>" --images-bundle-path /tmp/d8-images/d8.tar --min-version=1.45
   

   Note that --min-version parameter will be ignored if you specify version above current rock-solid channel.

4. Optional: Copy the dhctl binary from the container to the directory where Deckhouse images were pulled.

   cp /usr/bin/dhctl /tmp/d8-images/dhctl
   

5. Upload the directory with the pulled Deckhouse images to a host with access to the air-gapped registry.

6. To continue with installation, use the dhctl binary you copied before OR repeat steps 1 and 2 for the Deckhouse installer on the host with access to the air-gapped registry. Make sure the directory with the pulled Deckhouse images is mounted into the container. Push the images to the air-gapped registry using the dhctl mirror command.

   Example of pushing images from the /tmp/d8-images/d8.tar tarball:

   dhctl mirror --images-bundle-path /tmp/d8-images/d8.tar --registry="your.private.registry.com:5000/deckhouse/ee" --registry-login="<USERNAME>" --registry-password="<PASSWORD>"
   

   Please note that the images will be uploaded to the registry along the path specified in the --registry parameter (in the example above - /deckhouse/ee). Before running the command, make sure this path exists in your registry, and the account you are using has write permissions.

   If your registry does not require authentication, omit both --registry-login and --registry-password flags.

7. Once pushing images to the air-gapped private registry is complete, you are ready to install Deckhouse from it. Refer to the Getting started guide.

   To run the installer, use its image from your private registry where Deckhouse images reside, rather than from the public registry. In other words, your address should look something like your.private.registry.com:5000/deckhouse/ee/install:stable instead of registry.deckhouse.io/deckhouse/ee/install:stable.

   During installation, add your registry address and authorization data to the InitConfiguration resource (the imagesRepo and registryDockerCfg parameters; you might refer to step 3 of the Getting started guide as well).

How do I switch a running Deckhouse cluster to use a third-party registry?

To switch the Deckhouse cluster to using a third-party registry, follow these steps:

• Run deckhouse-controller helper change-registry inside the Deckhouse Pod with the new registry settings.

  • Example:

    kubectl exec -ti -n d8-system deploy/deckhouse -- deckhouse-controller helper change-registry --user my-user --password my-password registry.example.com/deckhouse
    

  • If the registry uses a self-signed certificate, put the root CA certificate that validates the registry’s HTTPS certificate to file ca.crt in the Deckhouse Pod and add the --ca-file ca.crt option to the script or put the content of CA into a variable.

    $ CA_CONTENT=$(cat <<EOF
    -----BEGIN CERTIFICATE-----
    CERTIFICATE
    -----END CERTIFICATE-----
    -----BEGIN CERTIFICATE-----
    CERTIFICATE
    -----END CERTIFICATE-----
    EOF
    )
    $ kubectl exec -ti -n d8-system deploy/deckhouse -- deckhouse-controller helper change-registry --user license-token --password YUvio925tyxFNBnqhfcx89nABwcnTP1K registry.deckhouse.io/deckhouse --ca-file <(cat <<<$CA_CONTENT)
    

• Wait for the Deckhouse Pod to become Ready. Restart Deckhouse Pod if it will be in ImagePullBackoff state.
• Wait for bashible to apply the new settings on the master node. The bashible log on the master node (journalctl -u bashible) should contain the message Configuration is in sync, nothing to do.
• If you want to disable Deckhouse automatic updates, remove the releaseChannel parameter from the deckhouse module configuration.

• Check if there are Pods with original registry in cluster (if there are — restart them):

  kubectl get pods -A -o json | jq '.items[] | select(.spec.containers[] | select((.image | contains("deckhouse.io"))))
    | .metadata.namespace + "\t" + .metadata.name' -r
  

How to bootstrap a cluster and run Deckhouse without the usage of release channels?

This method should only be used if there are no release channel images in your air-gapped registry.

• If you want to install Deckhouse with automatic updates disabled:
  • Use the tag of the installer image of the corresponding version. For example, use the image your.private.registry.com/deckhouse/install:v1.44.3, if you want to install release v1.44.3.
  • Set the corresponding version number in the deckhouse.devBranch parameter of the InitConfiguration resource.
  • Do not set the deckhouse.releaseChannel parameter of the InitConfiguration resource.
• If you want to disable automatic updates for an already installed Deckhouse (including patch release updates), then delete the releaseChannel parameter from the deckhouse module configuration.

Using a proxy server

Use the proxy parameter of the ClusterConfiguration resource to configure proxy usage.

An example:

apiVersion: deckhouse.io/v1
kind: ClusterConfiguration
clusterType: Cloud
cloud:
  provider: OpenStack
  prefix: main
podSubnetCIDR: 10.111.0.0/16
serviceSubnetCIDR: 10.222.0.0/16
kubernetesVersion: "Automatic"
cri: "Containerd"
clusterDomain: "cluster.local"
proxy:
  httpProxy: "http://user:password@proxy.company.my:3128"
  httpsProxy: "https://user:password@proxy.company.my:8443"

Changing the configuration

How do I change the configuration of a cluster?

The general cluster parameters are stored in the ClusterConfiguration structure.

To change the general cluster parameters, run the command:

kubectl -n d8-system exec -ti deploy/deckhouse -- deckhouse-controller edit cluster-configuration

After saving the changes, Deckhouse will bring the cluster configuration to the state according to the changed configuration. Depending on the size of the cluster, this may take some time.

How do I change the configuration of a cloud provider in a cluster?

Cloud provider setting of a cloud of hybrid cluster are stored in the <PROVIDER_NAME>ClusterConfiguration structure, where <PROVIDER_NAME> — name/code of the cloud provider. E.g., for an OpenStack provider, the structure will be called OpenStackClusterConfiguration.

Regardless of the cloud provider used, its settings can be changed using the following command:

kubectl -n d8-system exec -ti deploy/deckhouse -- deckhouse-controller edit provider-cluster-configuration

How do I change the configuration of a static cluster?

Settings of a static cluster are stored in the StaticClusterConfiguration structure.

To change the settings of a static cluster, run the command:

kubectl -n d8-system exec -ti deploy/deckhouse -- deckhouse-controller edit static-cluster-configuration

How to switch Deckhouse EE to CE?

To switch Deckhouse Enterprise Edition to Community Edition, follow these steps:

1. Make sure that the modules used in the cluster are supported in Deckhouse CE. Disable modules that are not supported in Deckhouse CE.

2. Run the following command:

   kubectl exec -ti -n d8-system deploy/deckhouse -- deckhouse-controller helper change-registry registry.deckhouse.io/deckhouse/ce
   

3. Wait for the Deckhouse Pod to become Ready:

   kubectl -n d8-system get po -l app=deckhouse
   

4. Restart Deckhouse Pod if it will be in ImagePullBackoff state:

   kubectl -n d8-system delete po -l app=deckhouse
   

5. Wait for Deckhouse to restart and to complete all tasks in the queue:

   kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   

   Example of output when there are still jobs in the queue (length 38):

   # kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   Queue 'main': length 38, status: 'run first task'
   

   Example of output when the queue is empty (length 0):

   # kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   Queue 'main': length 0, status: 'waiting for task 0s'
   

6. On the master node, check the application of the new settings.

   The message Configuration is in sync, nothing to do should appear in the bashible systemd service log on the master node.

   An example::

   # journalctl -u bashible -n 5
   Jan 12 12:38:20 demo-master-0 bashible.sh[868379]: Configuration is in sync, nothing to do.
   Jan 12 12:38:20 demo-master-0 systemd[1]: bashible.service: Deactivated successfully.
   Jan 12 12:39:18 demo-master-0 systemd[1]: Started Bashible service.
   Jan 12 12:39:19 demo-master-0 bashible.sh[869714]: Configuration is in sync, nothing to do.
   Jan 12 12:39:19 demo-master-0 systemd[1]: bashible.service: Deactivated successfully.
   

7. Check if there are any Pods left in the cluster with the Deckhouse EE registry address:

   kubectl get pods -A -o json | jq '.items[] | select(.spec.containers[] | select((.image | contains("deckhouse.io/deckhouse/ee"))))
     | .metadata.namespace + "\t" + .metadata.name' -r | sort | uniq
   

   Sometimes, some static Pods may remain running (for example, kubernetes-api-proxy-*). This is due to the fact that kubelet does not restart the Pod despite changing the corresponding manifest, because the image used is the same for the Deckhouse CE and EE. To make sure that the corresponding manifests have also been changed, run the following command on any master node:

   grep -ri 'deckhouse.io/deckhouse/ee' /etc/kubernetes | grep -v backup
   

   The output of the command should be empty.

How to switch Deckhouse CE to EE?

You will need a valid license key (you can request a trial license key if necessary).

To switch Deckhouse Community Edition to Enterprise Edition, follow these steps:

1. Run the following command:

   LICENSE_TOKEN=<PUT_YOUR_LICENSE_TOKEN_HERE>
   kubectl exec -ti -n d8-system deploy/deckhouse -- deckhouse-controller helper change-registry --user license-token --password $LICENSE_TOKEN registry.deckhouse.io/deckhouse/ee
   

2. Wait for the Deckhouse Pod to become Ready:

   kubectl -n d8-system get po -l app=deckhouse
   

3. Restart Deckhouse Pod if it will be in ImagePullBackoff state:

   kubectl -n d8-system delete po -l app=deckhouse
   

4. Wait for Deckhouse to restart and to complete all tasks in the queue:

   kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   

   Example of output when there are still jobs in the queue (length 38):

   # kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   Queue 'main': length 38, status: 'run first task'
   

   Example of output when the queue is empty (length 0):

   # kubectl -n d8-system exec deploy/deckhouse -- deckhouse-controller queue main | grep status:
   Queue 'main': length 0, status: 'waiting for task 0s'
   

5. On the master node, check the application of the new settings.

   The message Configuration is in sync, nothing to do should appear in the bashible systemd service log on the master node.

   An example:

   # journalctl -u bashible -n 5
   Jan 12 12:38:20 demo-master-0 bashible.sh[868379]: Configuration is in sync, nothing to do.
   Jan 12 12:38:20 demo-master-0 systemd[1]: bashible.service: Deactivated successfully.
   Jan 12 12:39:18 demo-master-0 systemd[1]: Started Bashible service.
   Jan 12 12:39:19 demo-master-0 bashible.sh[869714]: Configuration is in sync, nothing to do.
   Jan 12 12:39:19 demo-master-0 systemd[1]: bashible.service: Deactivated successfully.
   

6. Check if there are any Pods left in the cluster with the Deckhouse CE registry address:

   kubectl get pods -A -o json | jq '.items[] | select(.spec.containers[] | select((.image | contains("deckhouse.io/deckhouse/ce"))))
     | .metadata.namespace + "\t" + .metadata.name' -r | sort | uniq
   

   Sometimes, some static Pods may remain running (for example, kubernetes-api-proxy-*). This is due to the fact that kubelet does not restart the Pod despite changing the corresponding manifest, because the image used is the same for the Deckhouse CE and EE. To make sure that the corresponding manifests have also been changed, run the following command on any master node:

   grep -ri 'deckhouse.io/deckhouse/ce' /etc/kubernetes | grep -v backup
   

   The output of the command should be empty.

How do I upgrade the Kubernetes version in a cluster?

To upgrade the Kubernetes version in a cluster change the kubernetesVersion parameter in the ClusterConfiguration structure by making the following steps:

1. Run the command:

   kubectl -n d8-system exec -ti deploy/deckhouse -- deckhouse-controller edit cluster-configuration
   

2. Change the kubernetesVersion field.
3. Save the changes. Cluster nodes will start updating sequentially.
4. Wait for the update to finish. You can track the progress of the update using the kubectl get no command. The update is completed when the new version appears in the command’s output for each cluster node in the VERSION column.

How do I run Deckhouse on a particular node?

Set the nodeSelector parameter of the deckhouse module and avoid setting tolerations. The necessary values will be assigned to the tolerations parameter automatically.

Here is an example of the module configuration:

apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  name: deckhouse
spec:
  version: 1
  settings:
    nodeSelector:
      node-role.deckhouse.io/deckhouse: ""