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268 lines
7.6 KiB
YAML
268 lines
7.6 KiB
YAML
---
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# Configure docker for k8s.
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- include_tasks: configure_docker.yml
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################################################################################
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# Install kublet, kudeadm, and kubectl
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################################################################################
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- name: Install kubectl dependencies.
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package:
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name:
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- apt-transport-https
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- ca-certificates
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- curl
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state: present
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become: true
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when: ansible_os_family == "Debian"
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- name: Add GPG key to apt for Ubuntu.
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apt_key:
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url: "{{ apt_gpg_key_url }}"
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id: "{{ apt_gpg_key_fingerprint }}"
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state: present
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become: true
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when: ansible_os_family == "Debian"
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- name: Add k8s repository for Debian-like distro.
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apt_repository:
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repo: "{{ apt_repo }}"
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state: present
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update_cache: true
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become: true
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when: ansible_os_family == "Debian"
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- name: Add k8s apt preferences file to pin a version.
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template:
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src: apt-preferences-k8s.j2
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dest: /etc/apt/preferences.d/kubernetes
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mode: 0644
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become: true
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when: ansible_os_family == "Debian"
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- name: Install kubectl.
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package:
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name:
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- kubectl
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- kubeadm
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- kubelet
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state: present
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become: true
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when: ansible_os_family == "Debian"
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- name: Add k8s repo for RedHat-like distro.
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yum_repository:
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name: kubernetes
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description: kubernetes
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baseurl: "{{ rh_yum_base_url }}"
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enabled: true
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gpgcheck: true
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repo_gpgcheck: true
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gpgkey: "{{ rh_yum_gpg_key }}"
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exclude: kubelet kudeadm kubectl
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become: true
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register: yum_repo
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when: ansible_os_family == 'RedHat'
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- name: debug
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debug:
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var: kubernetes_role
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- name: Set SELinux to permissive mode.
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selinux:
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policy: targeted
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state: permissive
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become: true
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when: ansible_os_family == 'RedHat'
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- name: Update SELinux config to set it to permissive mode at boot.
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replace:
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path: /etc/selinux/config
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regexp: '^SELINUX=enforcing$'
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replace: 'SELINUX=permissive'
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become: true
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when: ansible_os_family == 'RedHat'
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- name: Install kubelet, kubectl, and kubeadm.
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yum:
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name:
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- kubelet
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- kubectl
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- kubeadm
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state: present
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disable_excludes: kubernetes
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become: true
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when: ansible_os_family == 'RedHat'
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################################################################################
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# sysctl stuff
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# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#letting-iptables-see-bridged-traffic
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################################################################################
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- name: Force kernel modules to load.
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copy:
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dest: /etc/modules-load.d/k8s.conf
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content: br_netfilter
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mode: 0644
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become: true
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- name: Let iptables see bridged traffic.
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sysctl:
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name: "{{ item }}"
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value: '1'
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state: present
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become: true
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loop:
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- net.bridge.bridge-nf-call-iptables
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- net.bridge.bridge-nf-call-ip6tables
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################################################################################
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- name: Ensure kubelet is started and enabled at boot.
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service:
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name: kubelet
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state: started
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enabled: true
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become: true
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################################################################################
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# STARTHERE This command is failing on centos7 machine even though the command
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# works manually.
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#- name: Get swap status w/ shell.
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# shell: swapon -s
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- name: Get swap status.
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command: swapon -s
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# It's unclear why you need to be root for this commend. This command works
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# fine manually as the admin user, but the only way I could get this script to
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# work was to become root.
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become: true
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changed_when: false
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register: swap_status
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- name: Disable swap if needed.
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command: swapoff -a
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become: true
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changed_when: true
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when: swap_status.stdout | length > 0
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- name: comment out swap in fstab.
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replace:
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path: /etc/fstab
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regexp: '^([^#].*swap.*)$'
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replace: '# \1'
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become: true
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################################################################################
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# master
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################################################################################
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- name: Check the docker images currently on machine.
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command: docker images
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# We do this as root because the docker admin will not be able to until we
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# reset the connection. We could just as well do a reset here.
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become: true
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register: docker_images
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changed_when: false
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# TODO REM make these images full paths. and vars
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# TODO REM check nodes id they hae these images also.
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- name: Pre-grab the container images for the static pods.
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command: kubeadm config images pull
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# We do this as root because the docker admin will not be able to until we
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# reset the connection. We could just as well do a reset here.
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become: true
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changed_when: true
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when: >
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( 'kube-apiserver' not in docker_images.stdout or
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'kube-controller-manager' not in docker_images.stdout or
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'kube-scheduler' not in docker_images.stdout or
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'kube-proxy' not in docker_images.stdout or
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'etcd' not in docker_images.stdout or
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'coredns' not in docker_images.stdout or
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'pause' not in docker_images.stdout )
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- name: Initialize Kubernetes master with kubeadm init
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command:
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cmd: "{{ kubeadm_init_command }}"
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creates: /etc/kubernetes/admin.conf
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become: true
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# TODO REM do we need this register?
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register: kubeadmin_init
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ignore_errors: true
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when: kubernetes_role == 'master'
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- name: Debug kubectl init.
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debug:
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var: kubeadmin_init
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when: kubernetes_role == 'master'
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# TODO REM find a way to copy this file to local machine.
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- name: Ensure .kube directory exists.
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file:
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path: ~/.kube
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state: directory
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mode: 0700
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when: kubernetes_role == 'master'
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- name: Copy the kubectl admin.conf to ~/.kube/conf.
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copy:
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src: /etc/kubernetes/admin.conf
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remote_src: true
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dest: "/home/{{ ansible_user }}/.kube/config"
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mode: 0600
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owner: "{{ ansible_user }}"
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become: true
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when: kubernetes_role == 'master'
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################################################################################
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# Join nodes to cluster.
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################################################################################
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- name: Print the role.
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debug:
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var: kubernetes_role
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- name: Get the kubeadm join command from the Kubernetes master.
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command: kubeadm token create --print-join-command
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changed_when: false
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when: kubernetes_role == 'master'
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register: kubernetes_join_command_result
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# TODO REM remove this
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- name: debug
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debug:
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var: kubernetes_join_command_result
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# STARTHERE try to open firewall stuff on centos 7.
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# This is not how we want to do this just grab the join command from a mater no
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# need to set a fact.
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#- name: Set the kubeadm join command globally.
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# set_fact:
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# kubernetes_join_command: "{{ kubernetes_join_command_result.stdout }}"
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# when: kubernetes_join_command_result.stdout is defined
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# delegate_to: "{{ item }}"
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# delegate_facts: true
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# with_items: "{{ groups['all'] }}"
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#
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#- name: Join node to cluster.
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# command:
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# cmd: "{{ kubernetes_join_command }}"
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# creates: /etc/kubernetes/kubelet.conf
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# become: true
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# when: kubernetes_role == 'worker'
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#
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#################################################################################
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## calico
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#################################################################################
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#
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#- name: Check if calico is already deployed by getting all pods.
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# command: kubectl get pods --all-namespaces
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# ignore_errors: true
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# changed_when: false
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# register: pods
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# when: kubernetes_role == 'master'
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#
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#- name: Deploy Calico if not already installed.
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# command: "kubectl apply -f {{ calico_manifest_url }}"
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# register: calico_result
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# changed_when: "'created' in calico_result.stdout"
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# when: kubernetes_role == 'master' and 'calico' not in pods.stdout
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