upgrade-cluster.yml not upgrade kubeadm/kubectl on route reflectors (calico-rr)

[gaima8]

Environment:

• Cloud provider or hardware configuration:

Self hosted virtual machines

• OS (printf "$(uname -srm)\n$(cat /etc/os-release)\n"):

Linux 4.19.0-8-amd64 x86_64
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

• Version of Ansible (ansible --version):

ansible 2.9.6

• Version of Python (python --version):

Python 3.6.10

Kubespray version (commit) (git rev-parse --short HEAD):

3d6b9d6

Tags v2.13.1 and v2.13.2

Network plugin used:

calico

Full inventory with variables (ansible -i inventory/sample/inventory.ini all -m debug -a "var=hostvars[inventory_hostname]"):

[all]

[kube-master]
bddpink8sm1
bddpink8sm2

[etcd]
bddpink8se1
bddpink8se2
bddpink8se3

[kube-node]
bddpink8sw1
bddpink8sw2
bddpink8sw3

[calico-rr]
bddpink8srr1
bddpink8srr2

[k8s-cluster:children]
kube-master
kube-node
calico-rr

[rack0]
bddpink8srr1
bddpink8srr2
bddpink8sm1
bddpink8sm2
bddpink8sw1
bddpink8sw2
bddpink8sw3

[rack0:vars]
cluster_id="10.16.35.18"

Command used to invoke ansible:

ansible-playbook --become -i ../bddpink8s/inventory.ini upgrade-cluster.yml

Output of ansible run:

Anything else do we need to know:

This cluster was deployed from tag v2.12.4, then upgraded to tag v2.13.1, and then v2.13.2 (as more of a sanity check than anything).
During both upgrades kubeadm and kubectl on the route reflectors were not upgraded.
A very naive inspection of the kubespray output shows that the task kubernetes/node : install | Copy kubelet binary from download dir did not get executed on the route reflector nodes.

Before upgrade

$ kubectl get nodes -o wide                                
NAME                                STATUS   ROLES    AGE   VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                       KERNEL-VERSION   CONTAINER-RUNTIME
bddpink8sm1    Ready    master   91d   v1.16.8   10.16.35.11   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sm2    Ready    master   91d   v1.16.8   10.16.35.12   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8srr1   Ready    <none>   91d   v1.16.8   10.16.35.18   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8srr2   Ready    <none>   91d   v1.16.8   10.16.35.19   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw1    Ready    <none>   91d   v1.16.8   10.16.35.21   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw2    Ready    <none>   91d   v1.16.8   10.16.35.22   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw3    Ready    <none>   91d   v1.16.8   10.16.35.23   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7

After upgrade

$ kubectl get nodes -o wide
NAME                                STATUS   ROLES    AGE   VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                       KERNEL-VERSION   CONTAINER-RUNTIME
bddpink8sm1    Ready    master   91d   v1.17.6   10.16.35.11   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sm2    Ready    master   91d   v1.17.6   10.16.35.12   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8srr1   Ready    <none>   91d   v1.16.8   10.16.35.18   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8srr2   Ready    <none>   91d   v1.16.8   10.16.35.19   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw1    Ready    <none>   91d   v1.17.6   10.16.35.21   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw2    Ready    <none>   91d   v1.17.6   10.16.35.22   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7
bddpink8sw3    Ready    <none>   91d   v1.17.6   10.16.35.23   <none>        Debian GNU/Linux 10 (buster)   4.19.0-8-amd64   docker://18.9.7