Fix proxy usage when *_PROXY are present in environment (#7309)

Since a790935d02 all proxy users
should be properly configured

Now when you have *_PROXY vars in your environment it can leads to failure
if NO_PROXY is not correct, or to persistent configuration changes
as seen with kubeadm in 1c5391dda7

Instead of playing constant whack-a-bug, inject empty *_PROXY vars everywhere
at the play level, and override at the task level when needed

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

roles/kubernetes/control-plane/tasks/kubeadm-fix-apiserver.yml

@@ -20,7 +20,6 @@
     {{ bin_dir }}/kubeadm init phase kubeconfig all
     --config {{ kube_config_dir }}/kubeadm-config.yaml
     --kubeconfig-dir {{ kubeconfig_temp_dir.path }}
-  environment: "{{ proxy_disable_env }}"
   when: kubeconfig_correct_apiserver.rc != 0
 
 - name: Copy new kubeconfigs to kube config dir

roles/kubernetes/control-plane/tasks/kubeadm-secondary.yml

@@ -16,7 +16,6 @@
     --config {{ kube_config_dir }}/kubeadm-config.yaml
     upload-certs
     --upload-certs
-  environment: "{{ proxy_disable_env }}"
   register: kubeadm_upload_cert
   when:
     - inventory_hostname == groups['kube-master']|first
@@ -58,7 +57,8 @@
     {{ bin_dir }}/kubeadm join
     --config {{ kube_config_dir }}/kubeadm-controlplane.yaml
     --ignore-preflight-errors=all
-  environment: '{{ proxy_disable_env | combine({"PATH": "{{ bin_dir }}:{{ ansible_env.PATH }}"}) }}'
+  environment:
+    PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}"
   register: kubeadm_join_control_plane
   retries: 3
   throttle: 1

roles/kubernetes/control-plane/tasks/kubeadm-setup.yml

@@ -165,7 +165,8 @@
   until: kubeadm_init is succeeded or "field is immutable" in kubeadm_init.stderr
   when: inventory_hostname == groups['kube-master']|first and not kubeadm_already_run.stat.exists
   failed_when: kubeadm_init.rc != 0 and "field is immutable" not in kubeadm_init.stderr
-  environment: '{{ proxy_disable_env | combine({"PATH": "{{ bin_dir }}:{{ ansible_env.PATH }}"}) }}'
+  environment:
+    PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}"
   notify: Master | restart kubelet
 
 - name: set kubeadm certificate key
@@ -180,7 +181,6 @@
   shell: >-
     {{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token delete {{ kubeadm_token }} || :;
     {{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token create {{ kubeadm_token }}
-  environment: "{{ proxy_disable_env }}"
   changed_when: false
   when:
     - inventory_hostname == groups['kube-master']|first
@@ -191,7 +191,6 @@
 
 - name: Create kubeadm token for joining nodes with 24h expiration (default)
   command: "{{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token create"
-  environment: "{{ proxy_disable_env }}"
   changed_when: false
   register: temp_token
   retries: 5

roles/kubernetes/control-plane/tasks/kubeadm-version.yml

@@ -1,7 +1,6 @@
 ---
 - name: Get the kubeadm version
   command: "{{ bin_dir }}/kubeadm version -o short"
-  environment: "{{ proxy_disable_env }}"
   register: kubeadm_output
   changed_when: false