Merge pull request #234 from abhinandanpb/installer

kubernetes + cri-containerd + containerd installer

contrib/ansible/cri-containerd.yaml

@@ -0,0 +1,48 @@
+---
+- hosts: all 
+  become: true
+  tasks:
+    - include_vars: vars/vars.yaml # Contains tasks variables for installer
+    - include: tasks/bootstrap_ubuntu.yaml # Contains tasks bootstrap components for ubuntu systems 
+      when: ansible_distribution == "Ubuntu"
+    - include: tasks/bootstrap_centos.yaml # Contains tasks bootstrap components for centos systems
+      when: ansible_distribution == "CentOS"
+    - include: tasks/k8s.yaml # Contains tasks kubernetes component installation
+    - include: tasks/binaries.yaml # Contains tasks for pulling containerd and cri-containerd components
+       
+    - name: "Start Containerd"
+      systemd: name=containerd daemon_reload=yes state=started enabled=yes
+    
+    - name: "Start CRI-Containerd"
+      systemd: name=cri-containerd daemon_reload=yes state=started enabled=yes
+    
+    - name: "Set bridge-nf-call-iptables"
+      lineinfile:
+        line: "net/bridge/bridge-nf-call-iptables = 1"
+        dest: /etc/sysctl.conf
+        insertafter: 'EOF'
+        regexp: '\/net\/bridge\/bridge-nf-call-iptables = 1'
+        state: present
+      ignore_errors: true
+    
+    - name: "Check kubelet args in kubelet config"
+      shell: grep "^Environment=\"KUBELET_EXTRA_ARGS=" /etc/systemd/system/kubelet.service.d/10-kubeadm.conf 
+      ignore_errors: true
+      register: check_args
+
+    - name: "Add runtime args in kubelet conf"
+      lineinfile:
+                dest: "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
+                line: "Environment=\"KUBELET_EXTRA_ARGS= --container-runtime=remote --runtime-request-timeout=15m --image-service-endpoint=/var/run/cri-containerd.sock --container-runtime-endpoint=/var/run/cri-containerd.sock\""
+                insertafter: '\[Service\]'
+      when: check_args.stdout == ""
+    
+    - name: "Start Kubelet"
+      systemd: name=kubelet daemon_reload=yes state=started enabled=yes
+    
+    # TODO This needs to be removed once we have consistent concurrent pull results
+    - name: "Pre-pull pause container image"
+      shell: |
+             /usr/local/bin/ctr pull gcr.io/google_containers/pause:3.0
+             /usr/local/bin/crictl --runtime-endpoint /var/run/cri-containerd.sock \
+             pull gcr.io/google_containers/pause:3.0

contrib/ansible/tasks/binaries.yaml

@@ -0,0 +1,51 @@
+---
+- name: "Create a directory to download binaries"
+  file: path={{ cri_release_directory }} state=directory
+
+- name: "Get Containerd and CRI-Containerd"
+  get_url:
+    validate_certs: "no"
+    url: "https://storage.googleapis.com/cri-containerd-staging/cri-containerd-{{ cri_containerd_release_version }}.tar.gz"
+    dest: "{{ cri_release_directory }}"
+    mode: 0755
+
+- name: "Unpack Containerd and CRI-Containerd"
+  unarchive:
+    src: "{{ cri_release_directory }}cri-containerd-{{ cri_containerd_release_version }}.tar.gz"
+    dest: "{{ cri_release_directory }}"
+    remote_src: yes
+
+- name: "Install the containerd and cri-containerd binaries" 
+  copy:
+    src: "{{ cri_release_directory }}usr/local/bin/{{ item }}"
+    dest: "{{ local_bin_dir }}{{ item }}"
+    mode: 0755
+    remote_src: yes
+  with_items:
+    - containerd
+    - containerd-stress
+    - containerd-shim
+    - cri-containerd
+    - ctr
+    - crictl
+
+- name: "Install runc"
+  copy:    
+    src: "{{ cri_release_directory }}usr/local/sbin/{{ item }}"
+    dest: "{{ local_sbin_dir }}{{ item }}"
+    mode: 0755
+    remote_src: yes
+  with_items:
+    - runc
+
+- name: "Copy containerd systemd service unit"
+  template: src=../../systemd-units/containerd.service dest=/etc/systemd/system/containerd.service
+
+- name: "Copy cri-containerd systemd service unit"
+  template: src=../../systemd-units/cri-containerd.service dest=/etc/systemd/system/cri-containerd.service
+
+- name: "Create a directory for cni binary"
+  file: path={{ cni_bin_dir }} state=directory
+
+- name: "Create a directory for cni config files"
+  file: path={{ cni_conf_dir }} state=directory

contrib/ansible/tasks/bootstrap_centos.yaml

@@ -0,0 +1,13 @@
+---
+- name: "Install required packages on CentOS "
+  yum:
+    name: "{{ item }}"
+    state: latest
+    with_items:
+      - unzip
+      - tar
+      - btrfs-progs-devel
+      - libseccomp-devel
+      - util-linux 
+      - socat
+      - libselinux-python

contrib/ansible/tasks/bootstrap_ubuntu.yaml

@@ -0,0 +1,16 @@
+---
+- name: "Install required packages on Ubuntu"
+  package:
+    name: "{{ item }}"
+    state: latest
+  with_items:
+      - unzip
+      - tar
+      - apt-transport-https
+      - btrfs-tools
+      - libapparmor-dev
+      - libseccomp-dev # Revisit the need and alternatives for all -dev packages
+      - libseccomp2
+      - socat
+      - util-linux
+# TODO: Limited support for trusty for nsenter. Need to handle/verify 

contrib/ansible/tasks/k8s.yaml

@@ -0,0 +1,50 @@
+---
+- name: "Add gpg key (Ubuntu)"
+  apt_key:
+    url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
+    state: present
+  when: ansible_distribution == "Ubuntu"
+
+- name: "Add kubernetes source list (Ubuntu)"
+  apt_repository:
+    repo: "deb http://apt.kubernetes.io/ kubernetes-{{ ansible_distribution_release }} main"
+    state: present
+    filename: "kubernetes"
+  when: ansible_distribution == "Ubuntu"
+
+- name: "Update the repository cache (Ubuntu)"
+  apt: 
+    update_cache: yes
+  when: ansible_distribution == "Ubuntu"
+
+- name: "Add Kubernetes repository and install gpg key (CentOS)"
+  yum_repository:
+    name: kubernetes
+    description: Kubernetes repository
+    baseurl: https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
+    gpgcheck: yes
+    enabled: yes
+    repo_gpgcheck: yes
+    gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg
+  when: ansible_distribution == "CentOS"
+
+- name: "Disable SELinux (CentOS)"
+  selinux:
+    state: disabled
+  when: ansible_distribution == "CentOS"
+
+- name: "Install kubelet,kubeadm,kubectl (CentOS)"
+  yum: state=present name={{ item }}
+  with_items:
+    - kubelet
+    - kubeadm
+    - kubectl
+  when: ansible_distribution == "CentOS"
+
+- name: "Install kubelet, kubeadm, kubectl (Ubuntu)"
+  apt: name={{item}} state=installed
+  with_items:
+    - kubelet
+    - kubeadm
+    - kubectl
+  when: ansible_distribution == "Ubuntu"

contrib/ansible/vars/vars.yaml

@@ -0,0 +1,8 @@
+---
+# TODO update official versions once they are available
+cri_containerd_release_version: 0.1.0-234-g55a0887 
+cri_release_directory: /opt/cri-containerd/
+local_bin_dir: /usr/local/bin/
+local_sbin_dir: /usr/local/sbin/
+cni_bin_dir: /opt/cni/bin/
+cni_conf_dir: /etc/cni/net.d/

contrib/systemd-units/containerd.service

@@ -4,11 +4,13 @@ Documentation=https://containerd.io
 After=network.target
 
 [Service]
-Restart=always
-RestartSec=10
+ExecStartPre=/sbin/modprobe overlay
 ExecStart=/usr/local/bin/containerd
+Restart=always
+RestartSec=5
 Delegate=yes
 KillMode=process
+OOMScoreAdjust=-999
 
 [Install]
 WantedBy=multi-user.target

contrib/systemd-units/cri-containerd.service

@@ -5,7 +5,7 @@ After=containerd.service
 
 [Service]
 Restart=always
-RestartSec=10
+RestartSec=5
 ExecStart=/usr/local/bin/cri-containerd --logtostderr
 OOMScoreAdjust=-999