Add some work on loadbalancer

tasks/load_balancer.yml

@@ -19,7 +19,7 @@
     with_items:
       - { lbip: '{{ lbip_kubeapiserver }}', state: "MASTER", interface: '{{ lb_interface }}', auth_pass: '{{ lb_auth_pass }}' }
     when:
-      - groups['Kube-masters'][0] == ansible_hostname
+      - groups['KubernetesMasters'][0] == ansible_hostname
     notify: Restart keepalived
   - name: Install keepalived config file
     template:
@@ -28,5 +28,5 @@
     with_items:
       - { lbip: '{{ lbip_kubeapiserver }}', state: "BACKUP", interface: '{{ lb_interface }}', auth_pass: '{{ lb_auth_pass }}' }
     when:
-      - not groups['Kube-masters'][0] == ansible_hostname
+      - not groups['KubernetesMasters'][0] == ansible_hostname
     notify: Restart keepalived

templates/etc/keepalived/check_apiserver.sh.j2

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+errorExit() {
+    echo "*** $*" 1>&2
+    exit 1
+}
+
+curl --silent --max-time 2 --insecure https://localhost:6443/ -o /dev/null || errorExit "Error GET https://localhost:6443/"
+if ip addr | grep -q {{ lbip_kubeapiserver }}; then
+    curl --silent --max-time 2 --insecure https://{{ lbip_kubeapiserver }}:6443/ -o /dev/null || errorExit "Error GET https://{{ lbip_kubeapiserver }}:6443/"
+fi
+

templates/etc/keepalived/keepalived.conf.j2

@@ -0,0 +1,33 @@
+! Configuration File for keepalived
+global_defs {
+   router_id LVS_DEVEL
+}
+    
+vrrp_script check_apiserver {
+   script "/etc/keepalived/check_apiserver.sh"
+   interval 3
+   weight -2
+   fall 10
+   rise 2
+}
+    
+vrrp_instance VI_1 {
+    state {{ item.state }}
+    interface {{ item.interface }}
+    virtual_router_id 51
+{% if item.state == "MASTER" %}
+    priority 101
+{% elif item.state == "BACKUP" %}
+    priority 100
+{% endif %}
+    authentication {
+        auth_type PASS
+        auth_pass {{ item.auth_pass }}
+    }
+    virtual_ipaddress {
+        {{ item.lbip }}
+    }
+    track_script {
+        check_apiserver
+    }
+}