config/playbookconfig/playbookconfig/playbooks/bootstrap/roles/bringup-essential-services/tasks/bringup_kubemaster.yml

---
#
# Copyright (c) 2019 Wind River Systems, Inc.
#
# SPDX-License-Identifier: Apache-2.0
#
# SUB-TASKS DESCRIPTION:
#   Bring up Kubernetes master
#   - Update iptables
#   - Create manifest directory
#   - Set up pods cgroups for minimal set of controllers
#   - Enable kubelet service (with default/custom registry)
#   - Run kubeadm init
#   - Prepare admin.conf
#   - Set k8s environment variable for new shell
#   - Generate conf files for Multus
#   - Bring up Multus networking
#   - Generate conf files for Calico
#   - Bring up Calico networking
#   - Generate conf files for SRIOV networking
#   - Bring up SRIOV networking
#   - Generate conf files for SRIOV device plugin
#   - Bring up SRIOV device plugin
#   - Restrict coredns to master node
#   - Use anti-affinity for coredns pods
#   - Remove taint from master node
#   - Add kubelet service override
#   - Register kubelet with pmond
#   - Reload systemd
#

- name: Setup iptables for Kubernetes
  lineinfile:
    path: /etc/sysctl.d/k8s.conf
    line: "{{ item }}"
    create: yes
  with_items:
    - net.bridge.bridge-nf-call-ip6tables = 1
    - net.bridge.bridge-nf-call-iptables = 1
    - net.ipv4.ip_forward = 1
    - net.ipv4.conf.default.rp_filter = 0
    - net.ipv4.conf.all.rp_filter = 0
    - net.ipv6.conf.all.forwarding = 1

- block:
  - block:
    - name: Create daemon.json file for insecure registry
      copy:
        src: "{{ insecure_docker_registry_template }}"
        dest: /etc/docker/daemon.json
        remote_src: yes
        mode: 0644

    - name: Update daemon.json with registry IP
      command: "sed -i -e 's|<%= @insecure_registries %>|\"$DOCKER_REGISTRY_IP\"|g' /etc/docker/daemon.json"
      args:
        warn: false

    - name: Restart docker
      systemd:
        name: docker
        state: restarted
    when: not is_secure_registry

  environment:
    DOCKER_REGISTRY_IP: "{{ docker_registry }}"
  when: use_unified_registry

- name: Update kernel parameters for iptables
  command: sysctl --system &>/dev/null

- name: Create manifests directory required by kubelet
  file:
    path: /etc/kubernetes/manifests
    state: directory
    mode: 0700

- name: Create kubelet cgroup for minimal set
  file:
    path: "{{ cgroup_root }}/{{ item }}/{{ k8s_cgroup_name }}"
    state: directory
    recurse: yes
    owner: root
    group: root
    mode: 0700
  with_items:
    - cpuset
    - cpu
    - cpuacct
    - memory
    - systemd

- name: Get default k8s cpuset
  command: cat /sys/devices/system/cpu/online
  register: k8s_cpuset

- name: Get default k8s nodeset
  command: cat /sys/devices/system/node/online
  register: k8s_nodeset

- name: Set mems for cpuset controller
  shell: "echo {{ k8s_nodeset.stdout_lines[0] }} > {{ cgroup_root }}/cpuset/{{ k8s_cgroup_name }}/cpuset.mems || :"

- name: Set cpus for cpuset controller
  shell: "echo {{ k8s_cpuset.stdout_lines[0] }} > {{ cgroup_root }}/cpuset/{{ k8s_cgroup_name }}/cpuset.cpus || :"

- name: Create a tasks file for cpuset controller
  file:
    path: "{{ cgroup_root }}/cpuset/{{ k8s_cgroup_name }}/tasks"
    state: touch
    owner: root
    group: root
    mode: 0644

- name: Set kubelet node configuration
  set_fact:
    node_ip: "{{ controller_0_cluster_host }}"

- name: Create kubelet override config file
  template:
    src: "kubelet.conf.j2"
    dest: /etc/sysconfig/kubelet

- name: Enable kubelet
  systemd:
    name: kubelet
    enabled: yes

- name: Create Kube admin yaml
  copy:
    src: "{{ kube_admin_yaml_template }}"
    dest: /etc/kubernetes/kubeadm.yaml
    remote_src: yes

- name: Update Kube admin yaml with network info
  command: "{{ item }}"
  args:
    warn: false
  with_items:
    - "sed -i -e 's|<%= @apiserver_advertise_address %>|'$CLUSTER_IP'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @apiserver_loopback_address %>|'$LOOPBACK_IP'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @etcd_endpoint %>|'$ETCD_ENDPOINT'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @service_domain %>|'cluster.local'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @pod_network_cidr %>|'$POD_NETWORK_CIDR'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @service_network_cidr %>|'$SERVICE_NETWORK_CIDR'|g' /etc/kubernetes/kubeadm.yaml"
    - "sed -i -e 's|<%= @k8s_registry %>|'$K8S_REGISTRY'|g' /etc/kubernetes/kubeadm.yaml"
  environment:
    CLUSTER_IP: "{{ cluster_floating_address }}"
    LOOPBACK_IP: "{{ '127.0.0.1' if ipv6_addressing == False else '::1' }}"
    ETCD_ENDPOINT: "http://{{ cluster_floating_address | ipwrap }}:2379"
    POD_NETWORK_CIDR: "{{ cluster_pod_subnet }}"
    SERVICE_NETWORK_CIDR: "{{ cluster_service_subnet }}"
    K8S_REGISTRY: "{{ k8s_registry }}"

- name: Initializing Kubernetes master
  command: kubeadm init --config=/etc/kubernetes/kubeadm.yaml

- name: Update kube admin.conf file mode and owner
  file:
    path: /etc/kubernetes/admin.conf
    mode: 0640
    group: wrs_protected

- name: Set up k8s environment variable
  copy:
    src: /usr/share/puppet/modules/platform/files/kubeconfig.sh
    dest: /etc/profile.d/kubeconfig.sh
    remote_src: yes

- name: Set Calico cluster configuration
  set_fact:
    cluster_network_ipv4: "{{ cluster_pod_subnet | ipv4 }}"
    cluster_network_ipv6: "{{ cluster_pod_subnet | ipv6 }}"

# Configure calico networking using the Kubernetes API datastore.
- name: Create Calico config file
  template:
    src: "calico-cni.yaml.j2"
    dest: /etc/kubernetes/calico.yaml

- name: Activate Calico Networking
  command: "kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f /etc/kubernetes/calico.yaml"

- name: Create Multus config file
  template:
    src: "multus-cni.yaml.j2"
    dest: /etc/kubernetes/multus.yaml

- name: Activate Multus Networking
  command: "kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f /etc/kubernetes/multus.yaml"

- name: Create SRIOV Networking config file
  template:
    src: "sriov-cni.yaml.j2"
    dest: /etc/kubernetes/sriov-cni.yaml

- name: Activate SRIOV Networking
  command: "kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f /etc/kubernetes/sriov-cni.yaml"

- name: Create SRIOV device plugin config file
  template:
    src: "sriov-plugin.yaml.j2"
    dest: /etc/kubernetes/sriovdp-daemonset.yaml

- name: Activate SRIOV device plugin
  command: "kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f /etc/kubernetes/sriovdp-daemonset.yaml"

- name: Restrict coredns to master node
  command: >-
    kubectl --kubeconfig=/etc/kubernetes/admin.conf -n kube-system patch deployment coredns -p
    '{"spec":{"template":{"spec":{"nodeSelector":{"node-role.kubernetes.io/master":""}}}}}'    

- name: Use anti-affinity for coredns pods
  command: >-
    kubectl --kubeconfig=/etc/kubernetes/admin.conf -n kube-system patch deployment coredns -p
    '{"spec":{"template":{"spec":{"affinity":{"podAntiAffinity":{"requiredDuringSchedulingIgnoredDuringExecution":[{"labelSelector":{"matchExpressions":[{"key":"k8s-app","operator":"In","values":["kube-dns"]}]},"topologyKey":"kubernetes.io/hostname"}]}}}}}}'    

- name: Remove taint from master node
  shell: "kubectl --kubeconfig=/etc/kubernetes/admin.conf taint node controller-0 node-role.kubernetes.io/master- || true"

- name: Add kubelet service override
  copy:
    src: "{{ kubelet_override_template }}"
    dest: /etc/systemd/system/kubelet.service.d/kube-stx-override.conf
    mode: preserve
    remote_src: yes

- name: Register kubelet with pmond
  copy:
    src: "{{ kubelet_pmond_template }}"
    dest: /etc/pmon.d/kubelet.conf
    mode: preserve
    remote_src: yes

- name: Reload systemd
  command: systemctl daemon-reload

- name: Mark Kubernetes config complete
  file:
    path: /etc/platform/.initial_k8s_config_complete
    state: touch