Add extra kubelet args to avoid kubectl logs timeouts

Kubelet should use VXLAN overlay IP to make kubectl logs
work correctly and avoid timeouts which often lead to
post failures.

Change-Id: I4cfd6cb74019f150383cc0992e33c16db15e444f
Signed-off-by: Vladimir Kozhukalov <kozhukalov@gmail.com>

roles/deploy-env/files/etc_default_kubelet.j2

@@ -0,0 +1 @@
+KUBELET_EXTRA_ARGS="{% if overlay_network_setup %}--node-ip {{ overlay_network_bridge_ip }}{% endif %}"

roles/deploy-env/files/kubeadm_config.yaml.j2

@@ -12,6 +12,11 @@ networking:
   serviceSubnet: "{{ kubeadm.service_cidr }}"  # --service-cidr
   podSubnet: "{{ kubeadm.pod_network_cidr }}"  # --pod-network-cidr
   dnsDomain: "cluster.local"
+apiServer:
+  ControlPlaneComponent:
+    extraArgs:
+      - name: kubelet-preferred-address-types
+        value: "InternalIP,Hostname,InternalDNS,ExternalIP,ExternalDNS"
 ...
 ---
 apiVersion: kubeadm.k8s.io/v1beta4

roles/deploy-env/tasks/main.yaml

@@ -44,6 +44,12 @@
     file: k8s_control_plane.yaml
   when: inventory_hostname in (groups['k8s_control_plane'] | default([]))
 
+- name: Prepare kubeadm config
+  template:
+    src: files/etc_default_kubelet.j2
+    dest: /etc/default/kubelet
+  when: inventory_hostname in (groups['k8s_nodes'] | default([]))
+
 - name: Join workload nodes to cluster
   command: "{{ (groups['k8s_control_plane'] | map('extract', hostvars, ['join_command', 'stdout_lines', 0]))[0] }}"
   when: inventory_hostname in (groups['k8s_nodes'] | default([]))

roles/gather-pod-logs/tasks/main.yaml

@@ -24,13 +24,12 @@
 - name: "retrieve all kubernetes logs, current and previous (if they exist)"
   shell: |-
           set -e
-          PARALLELISM_FACTOR=2
           function get_namespaces () {
             kubectl get namespaces -o name | awk -F '/' '{ print $NF }'
           }
           function get_pods () {
             NAMESPACE=$1
-            kubectl get pods -n ${NAMESPACE} -o name | awk -F '/' '{ print $NF }' | xargs -L1 -P 1 -I {} echo ${NAMESPACE} {}
+            kubectl get pods -n ${NAMESPACE} -o name | awk -F '/' '{ print $NF }' | xargs -I {} echo ${NAMESPACE} {}
           }
           export -f get_pods
           function get_pod_logs () {
@@ -48,8 +47,8 @@
           }
           export -f get_pod_logs
           get_namespaces | \
-            xargs -r -n 1 -P ${PARALLELISM_FACTOR} -I {} bash -c 'get_pods "$@"' _ {} | \
-            xargs -r -n 2 -P ${PARALLELISM_FACTOR} -I {} bash -c 'get_pod_logs "$@"' _ {}
+            xargs -r -I {} bash -c 'get_pods "$@"' _ {} | \
+            xargs -r -I {} bash -c 'get_pod_logs "$@"' _ {}
   args:
     executable: /bin/bash
   ignore_errors: True