Where To Find kube-controller-manager Cmd from Kubernetes Cluster

Requirement:

   We need to find  kube-controller-manager file from Kubernetes Cluster which is running on docker images.  refer github doc for Oracle K8S manual installation
    All core binaries are stored inside the docker images.

Solution:

Find the controller docker instance

#docker ps |grep controller
7fc8302ccfe3        887b8144f94f                                                         "kube-controller-man…"   15 hours ago        Up 15 hours                             k8s_kube-controller-manager_kube-controller-manager-instance-cas-mt2_kube-system_d739245871cdd71020650b11ac854d60_0

docker exec into the docker instance and find kube-controller-manager

#docker exec -it k8s_kube-controller-manager_kube-controller-manager-instance-cas-mt2_kube-system_d739245871cdd71020650b11ac854d60_0 /bin/bash

bash-4.2# which kube-controller-manager

/usr/local/bin/kube-controller-manager

Use docker cp to copy the file out of docker instance .

#docker cp k8s_kube-controller-manager_kube-controller-manager-instance-cas-mt2_kube-system_d739245871cdd71020650b11ac854d60_0:/usr/local/bin/kube-controller-manager /bin/