refactor: move variable name to kubelet_secure_addresses

docs/hardening.md

@@ -86,10 +86,12 @@ kubelet_make_iptables_util_chains: true
 kubelet_feature_gates: ["RotateKubeletServerCertificate=true","SeccompDefault=true"]
 kubelet_seccomp_default: true
 kubelet_systemd_hardening: true
-# in case you have multiple interfaces in your
+# In case you have multiple interfaces in your
 # control plane nodes and you want to specify the right
-# IP addresses
-kubelet_secure_address: "192.168.10.110 192.168.10.111 192.168.10.112"
+# IP addresses, kubelet_secure_addresses allows you
+# to specify the IP from which the kubelet
+# will receive the packets.
+kubelet_secure_addresses: "192.168.10.110 192.168.10.111 192.168.10.112"
 
 # additional configurations
 kube_owner: root

docs/vars.md

@@ -208,12 +208,12 @@ Stack](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/dns-stack.m
 
   **N.B.** To enable this feature, ensure you are using **`cgroup v2`** on your system. Check it out with command: `sudo ls -l /sys/fs/cgroup/*.slice`. If directory does not exists, enable this with the following guide: [enable cgroup v2](https://rootlesscontaine.rs/getting-started/common/cgroup2/#enabling-cgroup-v2).
 
-  * *kubelet_secure_address* - By default *kubelet_systemd_hardening* set the **control plane** `ansible_host` IPs as the `kubelet_secure_address`. In case you have multiple interfaces in your control plane nodes and the `kube-apiserver` is not bound to the default interface, you can override them with this variable.
+  * *kubelet_secure_addresses* - By default *kubelet_systemd_hardening* set the **control plane** `ansible_host` IPs as the `kubelet_secure_addresses`. In case you have multiple interfaces in your control plane nodes and the `kube-apiserver` is not bound to the default interface, you can override them with this variable.
     Example:
 
     The **control plane** node may have 2 interfaces with the following IP addresses: `eth0:10.0.0.110`, `eth1:192.168.1.110`.
 
-    By default the `kubelet_secure_address` is set with the `10.0.0.110` the ansible control host uses `eth0` to  connect to the machine. In case you want to use `eth1` as the outgoing interface on which `kube-apiserver` connects to the `kubelet`s, you should override the variable in this way: `kubelet_secure_address: "192.168.1.110"`.
+    By default the `kubelet_secure_addresses` is set with the `10.0.0.110` the ansible control host uses `eth0` to  connect to the machine. In case you want to use `eth1` as the outgoing interface on which `kube-apiserver` connects to the `kubelet`s, you should override the variable in this way: `kubelet_secure_addresses: "192.168.1.110"`.
 
 * *node_labels* - Labels applied to nodes via kubelet --node-labels parameter.
   For example, labels can be set in the inventory as variables or more widely in group_vars.

roles/kubernetes/node/defaults/main.yml

@@ -26,7 +26,7 @@ kubelet_fail_swap_on: true
 kubelet_systemd_hardening: false
 
 # List of secure IPs for kubelet
-kubelet_secure_address: "{{ groups['kube_control_plane'] | map('extract', hostvars, ['ansible_host']) | join(' ') }}"
+kubelet_secure_addresses: "{{ groups['kube_control_plane'] | map('extract', hostvars, ['ansible_host']) | join(' ') }}"
 
 # Reserve this space for kube resources
 kube_memory_reserved: 256Mi

roles/kubernetes/node/templates/kubelet.service.j2

@@ -27,7 +27,7 @@ RestartSec=10s
 {% if kubelet_systemd_hardening %}
 # Hardening setup
 IPAddressDeny=any
-IPAddressAllow={{ kubelet_secure_address }}
+IPAddressAllow={{ kubelet_secure_addresses }}
 {% endif %}
 
 [Install]