Can not delete a openEBS PVC

2021-03-21

Environment Debian 10 buster Kubernete v1.19.7 openEBS v2.7.0 Background I try to delete PVC created by openEBS. But, I can not delete it. kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE test-pvc Bound pvc-8d8b06d7-d5ee-4166-8b33-242f360072e0 100Mi RWO openebs-jiva-default 5m13s kubectl delete pvc test-pvc Error from server: error when deleting "deployment.yaml": admission webhook "admission-webhook.openebs.io" denied the request: snapshots verification failed failed to list snapshot s related to volume: pvc-8d8b06d7-d5ee-4166-8b33-242f360072e0: volumesnapshots.…

Completely uninstall Istio

2021-02-13

If you want to uninstall istio on your Kubernetes cluster, Delete istio-system namespace is not enough to uninstall istio. Need to delete CRDs too. Can be completely uninstall follow this command. If you installed using istioctl and default profile. istioctl x uninstall --purge kubectl delete ns istio-system or istioctl manifest generate --set profile=default | kubectl delete -f - kubectl delete ns istio-system Refarences https://istio.io/latest/docs/setup/getting-started/#uninstall https://stackoverflow.com/questions/54261468/uninstall-istio-all-components-completely-from-kubernetes-cluster

The mouse cursor size makes huge only when the cursor is on the GTK applications

2020-10-02

A few days ago, suddenly changed mouse cursor size. The mouse cursor size makes huge only when the cursor is on the GTK applications. Solution Add this line in the GTK setting (~/.config/gtk-3.0/settings.ini). You can set the size to your liking. gtk-cursor-theme-size = 16

Github Repo Does Not Show Travis CI

2020-08-19

Background Suddenly, Does not showed Travis CI in my Github repo. Solution Logout and login again to Travis CI Reference https://github.com/travis-ci/travis-ci/issues/8689

Panic in istio-init on Centos8 Based kubernetes cluster

2020-07-31

Background Recently, I migration operating system for kubenetes cluster from ubuntu 20.04 to centos 8. Setup kubernetes cluster on CentOS 8 and deploy istio. OK, deploy istio is a success. But sidecar injection has a problem. panic occurred on istio-init container. Error log Environment: ------------ ENVOY_PORT= INBOUND_CAPTURE_PORT= ISTIO_INBOUND_INTERCEPTION_MODE= ISTIO_INBOUND_TPROXY_MARK= ISTIO_INBOUND_TPROXY_ROUTE_TABLE= ISTIO_INBOUND_PORTS= ISTIO_LOCAL_EXCLUDE_PORTS= ISTIO_SERVICE_CIDR= ISTIO_SERVICE_EXCLUDE_CIDR= Variables: ---------- PROXY_PORT=15001 PROXY_INBOUND_CAPTURE_PORT=15006 PROXY_UID=1337 PROXY_GID=1337 INBOUND_INTERCEPTION_MODE=REDIRECT INBOUND_TPROXY_MARK=1337 INBOUND_TPROXY_ROUTE_TABLE=133 INBOUND_PORTS_INCLUDE=* INBOUND_PORTS_EXCLUDE=15090,15021,15020 OUTBOUND_IP_RANGES_INCLUDE=* OUTBOUND_IP_RANGES_EXCLUDE= OUTBOUND_PORTS_EXCLUDE= KUBEVIRT_INTERFACES= ENABLE_INBOUND_IPV6=false Writing following contents to rules file: /tmp/iptables-rules-1596187200181852254.…

Cannot start xmonad and recompile configuration file

2020-05-16

I tried starting the xmonad after upgrading Arch linux with pacman. But could not start. And, I tried to recompile the config file but I couldn’t. Log $ xmonad --recompile xmonad.hs:3:1: error: Could not load module ‘XMonad’ It is a member of the package ‘xmonad-0.15-INNaRsi8viXHVTtHIZOWoU’ which is unusable due to missing dependencies: X11-1.9.1-AFcCYyNZny21u722BShhIc data-default-0.7.1.1-KwmPSgEEmCp4io60ICryCw extensible-exceptions-0.1.1.4-4QtxTJe11myLMCZi4yvSzl setlocale-1.0.0.9-GbloffBFEmGB4tdjuaGaib utf8-string-1.0.1.1-IRxNMq5AVf036EceEkASq3 Use -v (or `:set -v` in ghci) to see a list of the files searched for.…

Failed upgrade k8s by kubespray

2020-05-14

I tried to upgrade v1.16.8 to v1.17.5 on the on-premise kubernetes cluster by kubespray. but, failed upgrade… Environment 1 master node 8 worker node Upgrade k8s v1.16.8 to v1.17.5 All node are Ubuntu 18.04.4 LTS kubespray v2.13.0 Log It seemed to fail it here. Master node success but, worker node failed… TASK [kubernetes/node : install | Copy kubeadm binary from download dir] **************************************************************************************************************** task path: /root/kubespray/roles/kubernetes/node/tasks/install.yml:2 The full traceback is: WARNING: The below traceback may *not* be related to the actual failure.…

Razer Viper Ultimate

2020-03-11

TR; DR: Razer Viper Ultimate is currently not configurable on Linux but can be used. I bought Razer Viper Ultimate. It is the first time I bought an expensive mouse, but I really liked it! First impressions I Felt the body was light and a very fast connection for a wireless mouse. And the feel of the click bottom and sensor is very good. But I feel the mouse wheel is heavy.…

Change TrackPoint speed on ThinkPad X1 Carbon 2018 (Gen 6) under the GNU/Linux

2020-03-06

Background I installed Arch Linux on ThinkPad X1 Carbon 2018. I edited /sys/devices/platform/i8042/serio1/ the file as well as ThinkPad x240 because I wanted to speed up TrackPoint. But did not works… Solution Create the following file. Path: /etc/libinput/local-overrides.quirks Content: [Trackpoint Override] MatchUdevType=pointingstick AttrTrackpointMultiplier=2.5 TrackPoint is a really good pointing device! Reference Change TrackPoint speed under Linux? https://www.reddit.com/r/thinkpad/comments/b5gqsv/change_trackpoint_speed_under_linux/