kubespray/tests/testcases/030_check-network.yml

---
- hosts: kube_control_plane[0]
  vars:
    test_image_repo: k8s.gcr.io/busybox
    test_image_tag: latest

  tasks:
  - name: Force binaries directory for Flatcar Container Linux by Kinvolk
    set_fact:
      bin_dir: "/opt/bin"
    when: ansible_os_family in ["Flatcar Container Linux by Kinvolk"]

  - name: Force binaries directory for other hosts
    set_fact:
      bin_dir: "/usr/local/bin"
    when: not ansible_os_family in ["Flatcar Container Linux by Kinvolk"]

  - name: Approve kubelet serving certificates
    block:

    - name: Get certificate signing requests
      command: "{{ bin_dir }}/kubectl get csr -o name"
      register: get_csr
      changed_when: false

    - name: Check there are csrs
      assert:
        that: get_csr.stdout_lines | length > 0
        fail_msg: kubelet_rotate_server_certificates is {{ kubelet_rotate_server_certificates }} but no csr's found

    - name: Approve certificates
      command: "{{ bin_dir }}/kubectl certificate approve {{ get_csr.stdout_lines | join(' ') }}"
      register: certificate_approve
      when: get_csr.stdout_lines | length > 0
      changed_when: certificate_approve.stdout

    - debug:
        msg: "{{ certificate_approve.stdout.split('\n') }}"

    when: kubelet_rotate_server_certificates | default(false)

  - name: Create test namespace
    command: "{{ bin_dir }}/kubectl create namespace test"
    changed_when: false

  - name: Wait for API token of test namespace
    shell: "set -o pipefail && {{ bin_dir }}/kubectl describe serviceaccounts default --namespace test | grep Tokens | awk '{print $2}'"
    args:
      executable: /bin/bash
    changed_when: false
    register: default_token
    until: default_token.stdout.find('<none>') == -1
    retries: 5
    delay: 5

  - name: Run 2 busybox pods in test ns
    command: "{{ bin_dir }}/kubectl run {{ item }} --image={{ test_image_repo }}:{{ test_image_tag }} --namespace test --command -- tail -f /dev/null"
    changed_when: false
    loop:
    - busybox1
    - busybox2

  - import_role:
      name: cluster-dump

  - name: Check that all pods are running and ready
    command: "{{ bin_dir }}/kubectl get pods --namespace test --no-headers -o yaml"
    changed_when: false
    register: run_pods_log
    until:
    # Check that all pods are running
    - '(run_pods_log.stdout | from_yaml)["items"] | map(attribute = "status.phase") | unique | list == ["Running"]'
    # Check that all pods are ready
    - '(run_pods_log.stdout | from_yaml)["items"] | map(attribute = "status.containerStatuses") | map("map", attribute = "ready") | map("min") | min'
    retries: 18
    delay: 10
    failed_when: false
    no_log: true

  - name: Get pod names
    command: "{{ bin_dir }}/kubectl get pods -n test -o json"
    changed_when: false
    register: pods
    no_log: true

  - debug:
      msg: "{{ pods.stdout.split('\n') }}"
    failed_when: not run_pods_log is success

  - name: Get hostnet pods
    command: "{{ bin_dir }}/kubectl get pods -n test -o
            jsonpath='{range .items[?(.spec.hostNetwork)]}{.metadata.name} {.status.podIP} {.status.containerStatuses} {end}'"
    changed_when: false
    register: hostnet_pods
    ignore_errors: true
    no_log: true

  - name: Get running pods
    command: "{{ bin_dir }}/kubectl get pods -n test -o
            jsonpath='{range .items[?(.status.phase==\"Running\")]}{.metadata.name} {.status.podIP} {.status.containerStatuses} {end}'"
    changed_when: False
    register: running_pods
    no_log: true

  - name: Check kubectl output
    command: "{{ bin_dir }}/kubectl get pods --all-namespaces -owide"
    changed_when: False
    register: get_pods
    no_log: true

  - debug:
      msg: "{{ get_pods.stdout.split('\n') }}"

  - name: Set networking facts
    set_fact:
      kube_pods_subnet: 10.233.64.0/18
      pod_names: "{{ (pods.stdout | from_json)['items'] | map(attribute = 'metadata.name') | list }}"
      pod_ips: "{{ (pods.stdout | from_json)['items'] | selectattr('status.podIP', 'defined') | map(attribute = 'status.podIP') | list }}"
      pods_hostnet: |
        {% set list = hostnet_pods.stdout.split(" ") %}
        {{ list }}        
      pods_running: |
        {% set list = running_pods.stdout.split(" ") %}
        {{ list }}        

  - name: Check pods IP are in correct network
    assert:
      that: item | ipaddr(kube_pods_subnet)
    when:
    - not item in pods_hostnet
    - item in pods_running
    with_items: "{{ pod_ips }}"

  - name: Ping between pods is working
    command: "{{ bin_dir }}/kubectl -n test exec {{ item[0] }} -- ping -c 4 {{ item[1] }}"
    when:
    - not item[0] in pods_hostnet
    - not item[1] in pods_hostnet
    with_nested:
    - "{{ pod_names }}"
    - "{{ pod_ips }}"

  - name: Ping between hostnet pods is working
    command: "{{ bin_dir }}/kubectl -n test exec {{ item[0] }} -- ping -c 4 {{ item[1] }}"
    when:
    - item[0] in pods_hostnet
    - item[1] in pods_hostnet
    with_nested:
    - "{{ pod_names }}"
    - "{{ pod_ips }}"