Yamllint fixes (#4410)

* Lint everything in the repository with yamllint

* yamllint fixes: syntax fixes only

* yamllint fixes: move comments to play names

* yamllint fixes: indent comments in .gitlab-ci.yml file

contrib/vault/groups_vars/vault.yaml

+---
 vault_deployment_type: docker
 vault_binary_checksum: 3c4d70ba71619a43229e65c67830e30e050eab7a81ac6b28325ff707e5914188
 vault_version: 0.10.1

docs/calico_peer_example/new-york.yml

@@ -4,7 +4,7 @@
 #     as: "65xxx"
 #   - router_id: "10.99.0.35"
 #     as: "65xxx"
-#
+
 # loadbalancer_apiserver:
 #   address: "10.99.0.44"
 #   port: "8383"

docs/calico_peer_example/paris.yml

@@ -4,7 +4,7 @@
 #     as: "65xxx"
 #   - router_id: "10.99.0.3"
 #     as: "65xxx"
-#
+
 # loadbalancer_apiserver:
 #   address: "10.99.0.21"
 #   port: "8383"

extra_playbooks/upgrade-only-k8s.yml

+---
 ### NOTE: This playbook cannot be used to deploy any new nodes to the cluster.
 ### Additional information:
 ### * Will not upgrade etcd
@@ -38,8 +39,8 @@
     - { role: kubespray-defaults}
     - { role: kubernetes/preinstall, tags: preinstall }
 
-#Handle upgrades to master components first to maintain backwards compat.
-- hosts: kube-master
+- name: Handle upgrades to master components first to maintain backwards compat.
+  hosts: kube-master
   any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
   serial: 1
   roles:
@@ -51,8 +52,8 @@
     - { role: kubernetes-apps/cluster_roles, tags: cluster-roles }
     - { role: upgrade/post-upgrade, tags: post-upgrade }
 
-#Finally handle worker upgrades, based on given batch size
-- hosts: kube-node:!kube-master
+- name: Finally handle worker upgrades, based on given batch size
+  hosts: kube-node:!kube-master
   any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
   serial: "{{ serial | default('20%') }}"
   roles:

inventory/sample/group_vars/all/all.yml

+---
 ## Directory where etcd data stored
 etcd_data_dir: /var/lib/etcd
 

inventory/sample/group_vars/all/docker.yml

+---
 ## Uncomment this if you want to force overlay/overlay2 as docker storage driver
 ## Please note that overlay2 is only supported on newer kernels
 # docker_storage_options: -s overlay2

inventory/sample/group_vars/all/oci.yml

@@ -10,19 +10,19 @@
 # oci_subnet2_id:
 ## Overide these default/optional behaviors if you wish
 # oci_security_list_management: All
-# If you would like the controller to manage specific lists per subnet. This is a mapping of subnet ocids to security list ocids. Below are examples. 
+## If you would like the controller to manage specific lists per subnet. This is a mapping of subnet ocids to security list ocids. Below are examples.
 # oci_security_lists:
 #   ocid1.subnet.oc1.phx.aaaaaaaasa53hlkzk6nzksqfccegk2qnkxmphkblst3riclzs4rhwg7rg57q: ocid1.securitylist.oc1.iad.aaaaaaaaqti5jsfvyw6ejahh7r4okb2xbtuiuguswhs746mtahn72r7adt7q
 #   ocid1.subnet.oc1.phx.aaaaaaaahuxrgvs65iwdz7ekwgg3l5gyah7ww5klkwjcso74u3e4i64hvtvq: ocid1.securitylist.oc1.iad.aaaaaaaaqti5jsfvyw6ejahh7r4okb2xbtuiuguswhs746mtahn72r7adt7q
-# If oci_use_instance_principals is true, you do not need to set the region, tenancy, user, key, passphrase, or fingerprint
+## If oci_use_instance_principals is true, you do not need to set the region, tenancy, user, key, passphrase, or fingerprint
 # oci_use_instance_principals: false
 # oci_cloud_controller_version: 0.6.0
-# If you would like to control OCI query rate limits for the controller 
+## If you would like to control OCI query rate limits for the controller
 # oci_rate_limit:
 #   rate_limit_qps_read:
 #   rate_limit_qps_write:
 #   rate_limit_bucket_read:
 #   rate_limit_bucket_write:
-# Other optional variables
+## Other optional variables
 # oci_cloud_controller_pull_source: (default iad.ocir.io/oracle/cloud-provider-oci)
 # oci_cloud_controller_pull_secret: (name of pull secret to use if you define your own mirror above)

inventory/sample/group_vars/k8s-cluster/addons.yml

+---
 # Kubernetes dashboard
 # RBAC required. see docs/getting-started.md for access details.
 dashboard_enabled: true

inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml

+---
 # Kubernetes configuration dirs and system namespace.
 # Those are where all the additional config stuff goes
 # the kubernetes normally puts in /srv/kubernetes.

inventory/sample/group_vars/k8s-cluster/k8s-net-canal.yml

@@ -8,4 +8,3 @@
 # Whether or not to masquerade traffic to destinations not within
 # the pod network.
 # canal_masquerade: "true"
-