Solutions and FAQ

Disable Ubuntu unattended upgrades
Tag: agent, nodes Disabling unattended upgrades is recommended to avoid unexpected outages due to packages updated at runtime outside of scheduled maint...
Fri, 22 Apr, 2022 at 11:06 AM
Elasticsearch watchers
[Supported in Kublr 1.21.0 and later] Tags: elasticsearch, watchers By default Elasticsearch is configured with a Basic license and SearchGuard plugin ...
Fri, 11 Jun, 2021 at 4:24 AM
Expanding Persistent Volumes
TABLE OF CONTENTS Volume Resizing Procedure Recovering from failure when expanding volumes Tags: persistence Many Kubernetes cloud providers s...
Fri, 2 Jul, 2021 at 11:47 AM
Extend Kubernetes Audit logs collected by Kublr
By default, kubler collects only request metadata. To collect request body and response body, need to use other predefined audit policies. There are three...
Mon, 11 Apr, 2022 at 11:44 AM
Ingress controller with Azure WAF and Azure Front Door
Tags: azure, ingress, application gateway, front door, web application firewall Overview Azure Web Application Firewall (WAF) provides centralized prot...
Mon, 4 Oct, 2021 at 9:51 AM
Interrupt cluster update operation via Kublr API
Tags: kcp TABLE OF CONTENTS Overview Interrupt operation Overview Sometimes it is necessary to interrupt a cluster update or another long-ru...
Thu, 17 Mar, 2022 at 4:26 PM
Java Applications Resource Management on Kubernetes
Tags: Java, JVM, Resources TABLE OF CONTENTS Resource limits considerations Troubleshooting Java parameters and resource usage References and additi...
Wed, 19 May, 2021 at 12:37 PM
Keycloak in HA Mode
[Supported in Kublr 1.20.0 and later] In order to run keycloak in HA mode you need to use following configuration in the cluster specification: spe...
Fri, 23 Apr, 2021 at 5:44 PM
Kublr Control Plane cannot continue due the k8s cluster upgrade
Overview In most cases,  Kublr Control Plane installation use non HA mode DataBases with one replica deployment. DataBase need PV for persistent data stora...
Mon, 22 May, 2023 at 8:49 AM
Kublr Role for Cluster Management without Access to Cluster Root Kubeconfig
Tags: security The following Kublr role enables various cluster operations (update/delete etc) withholding access to the cluster admin kubeconfig file. ...
Tue, 20 Jul, 2021 at 4:42 PM