Merge pull request #3 from kubernetes-incubator/master

Sync Upstream

docs/getting-started.md

@@ -51,6 +51,18 @@ ansible-playbook -i inventory/mycluster/hosts.ini scale.yml -b -v \
   --private-key=~/.ssh/private_key
 ```
 
+Remove nodes
+------------
+
+You may want to remove **worker** nodes to your existing cluster. This can be done by re-running the `remove-node.yml` playbook. First, all nodes will be drained, then stop some kubernetes services and delete some certificates, and finally execute the kubectl command to delete these nodes. This can be combined with the add node function, This is generally helpful when doing something like autoscaling your clusters. Of course if a node is not working, you can remove the node and install it again.
+
+- Add worker nodes to the list under kube-node if you want to delete them (or utilize a [dynamic inventory](https://docs.ansible.com/ansible/intro_dynamic_inventory.html)).
+- Run the ansible-playbook command, substituting `remove-node.yml`:
+```
+ansible-playbook -i inventory/mycluster/hosts.ini remove-node.yml -b -v \
+  --private-key=~/.ssh/private_key
+```
+
 Connecting to Kubernetes
 ------------------------
 By default, Kubespray configures kube-master hosts with insecure access to

inventory/sample/group_vars/all.yml

@@ -76,6 +76,7 @@ bin_dir: /usr/local/bin
 #azure_subnet_name:
 #azure_security_group_name:
 #azure_vnet_name:
+#azure_vnet_resource_group:
 #azure_route_table_name:
 
 ## When OpenStack is used, Cinder version can be explicitly specified if autodetection fails (Fixed in 1.9: https://github.com/kubernetes/kubernetes/issues/50461)

inventory/sample/group_vars/k8s-cluster.yml

@@ -113,6 +113,9 @@ kube_apiserver_insecure_port: 8080 # (http)
 # Can be ipvs, iptables
 kube_proxy_mode: iptables
 
+## Encrypting Secret Data at Rest (experimental)
+kube_encrypt_secret_data: false
+
 # DNS configuration.
 # Kubernetes cluster name, also will be used as DNS domain
 cluster_name: cluster.local

roles/docker/defaults/main.yml

@@ -21,16 +21,16 @@ docker_dns_servers_strict: yes
 
 docker_container_storage_setup: false
 
-#CentOS/RedHat docker-ce repo
+# CentOS/RedHat docker-ce repo
 docker_rh_repo_base_url: 'https://download.docker.com/linux/centos/7/$basearch/stable'
 docker_rh_repo_gpgkey: 'https://download.docker.com/linux/centos/gpg'
-#Ubuntu docker-ce repo
+# Ubuntu docker-ce repo
 docker_ubuntu_repo_base_url: "https://download.docker.com/linux/ubuntu"
 docker_ubuntu_repo_gpgkey: 'https://download.docker.com/linux/ubuntu/gpg'
-#Debian docker-ce repo
+# Debian docker-ce repo
 docker_debian_repo_base_url: "https://download.docker.com/linux/debian"
 docker_debian_repo_gpgkey: 'https://download.docker.com/linux/debian/gpg'
-#dockerproject repo
+# dockerproject repo
 dockerproject_rh_repo_base_url: 'https://yum.dockerproject.org/repo/main/centos/7'
 dockerproject_rh_repo_gpgkey: 'https://yum.dockerproject.org/gpg'
 dockerproject_apt_repo_base_url: 'https://apt.dockerproject.org/repo'

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/ingress-nginx-cm.yml.j2

@@ -7,4 +7,4 @@ metadata:
   labels:
     k8s-app: ingress-nginx
 data:
-  {{ ingress_nginx_configmap | to_nice_yaml }}
+  {{ ingress_nginx_configmap | to_nice_yaml | indent(2) }}

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/ingress-nginx-tcp-servicecs-cm.yml.j2

@@ -7,4 +7,4 @@ metadata:
   labels:
     k8s-app: ingress-nginx
 data:
-  {{ ingress_nginx_configmap_tcp_services | to_nice_yaml }}
+  {{ ingress_nginx_configmap_tcp_services | to_nice_yaml | indent(2) }}

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/ingress-nginx-udp-servicecs-cm.yml.j2

@@ -7,4 +7,4 @@ metadata:
   labels:
     k8s-app: ingress-nginx
 data:
-  {{ ingress_nginx_configmap_udp_services | to_nice_yaml }}
+  {{ ingress_nginx_configmap_udp_services | to_nice_yaml | indent(2) }}

roles/kubernetes/master/defaults/main.yml

@@ -92,3 +92,8 @@ kube_kubeadm_scheduler_extra_args: {}
 
 ## Variable for influencing kube-scheduler behaviour
 volume_cross_zone_attachment: false
+
+## Encrypting Secret Data at Rest
+kube_encrypt_secret_data: false
+kube_encrypt_token: "{{ lookup('password', inventory_dir + '/credentials/kube_encrypt_token length=32 chars=ascii_letters,digits') }}"
+kube_encryption_algorithm: "aescbc" # Must be either: aescbc, secretbox or aesgcm

roles/kubernetes/master/tasks/encrypt-at-rest.yml

@@ -0,0 +1,10 @@
+---
+- name: Write secrets for encrypting secret data at rest
+  template:
+    src: secrets_encryption.yaml.j2
+    dest: "{{ kube_config_dir }}/ssl/secrets_encryption.yaml"
+    owner: root
+    group: "{{ kube_cert_group }}"
+    mode: 0640
+  tags:
+    - kube-apiserver

roles/kubernetes/master/tasks/main.yml

@@ -12,6 +12,9 @@
 - import_tasks: users-file.yml
   when: kube_basic_auth|default(true)
 
+- import_tasks: encrypt-at-rest.yml
+  when: kube_encrypt_secret_data
+
 - name: Compare host kubectl with hyperkube container
   command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /usr/bin/cmp /hyperkube /systembindir/kubectl"
   register: kubectl_task_compare_result

roles/kubernetes/master/templates/kubeadm-config.yaml.j2

@@ -37,6 +37,7 @@ apiServerExtraArgs:
   admission-control: {{ kube_apiserver_admission_control | join(',') }}
   apiserver-count: "{{ kube_apiserver_count }}"
   service-node-port-range: {{ kube_apiserver_node_port_range }}
+  kubelet-preferred-address-types: "{{ kubelet_preferred_address_types }}"
 {% if kube_basic_auth|default(true) %}
   basic-auth-file: {{ kube_users_dir }}/known_users.csv
 {% endif %}
@@ -52,6 +53,9 @@ apiServerExtraArgs:
 {%   if kube_oidc_groups_claim is defined %}
   oidc-groups-claim: {{ kube_oidc_groups_claim }}
 {%   endif %}
+{% endif %}
+{% if kube_encrypt_secret_data %}
+  experimental-encryption-provider-config: {{ kube_config_dir }}/ssl/secrets_encryption.yaml
 {% endif %}
   storage-backend: {{ kube_apiserver_storage_backend }}
 {% if kube_api_runtime_config is defined %}
@@ -59,7 +63,7 @@ apiServerExtraArgs:
 {% endif %}
   allow-privileged: "true"
 {% for key in kube_kubeadm_apiserver_extra_args %}
-  {{ key }}: {{ kube_kubeadm_apiserver_extra_args[key] }}
+  {{ key }}: "{{ kube_kubeadm_apiserver_extra_args[key] }}"
 {% endfor %}
 controllerManagerExtraArgs:
   node-monitor-grace-period: {{ kube_controller_node_monitor_grace_period }}
@@ -69,12 +73,12 @@ controllerManagerExtraArgs:
   feature-gates: {{ kube_feature_gates|join(',') }}
 {% endif %}
 {% for key in kube_kubeadm_controller_extra_args %}
-  {{ key }}: {{ kube_kubeadm_controller_extra_args[key] }}
+  {{ key }}: "{{ kube_kubeadm_controller_extra_args[key] }}"
 {% endfor %}
 {% if kube_kubeadm_scheduler_extra_args|length > 0 %}
 schedulerExtraArgs:
 {% for key in kube_kubeadm_scheduler_extra_args %}
-  {{ key }}: {{ kube_kubeadm_scheduler_extra_args[key] }}
+  {{ key }}: "{{ kube_kubeadm_scheduler_extra_args[key] }}"
 {% endfor %}
 {% endif %}
 apiServerCertSANs:

roles/kubernetes/master/templates/manifests/kube-apiserver.manifest.j2

@@ -103,6 +103,9 @@ spec:
 {% if authorization_modes %}
     - --authorization-mode={{ authorization_modes|join(',') }}
 {% endif %}
+{% if kube_encrypt_secret_data %}
+    - --experimental-encryption-provider-config={{ kube_config_dir }}/ssl/secrets_encryption.yaml
+{% endif %}
 {% if kube_feature_gates %}
     - --feature-gates={{ kube_feature_gates|join(',') }}
 {% endif %}

roles/kubernetes/master/templates/secrets_encryption.yaml.j2

@@ -0,0 +1,11 @@
+kind: EncryptionConfig
+apiVersion: v1
+resources:
+  - resources:
+    - secrets
+    providers:
+    - {{ kube_encryption_algorithm }}:
+        keys:
+        - name: key
+          secret: {{ kube_encrypt_token | b64encode }}
+    - identity: {}

roles/kubernetes/node/templates/kubelet-container.j2

@@ -5,8 +5,8 @@
   --privileged \
   --name=kubelet \
   --restart=on-failure:5 \
-  --memory={{ kubelet_memory_limit|regex_replace('Mi', 'M') }} \
-  --cpu-shares={{ kubelet_cpu_limit|regex_replace('m', '')  }} \
+  --memory={{ kube_memory_reserved|regex_replace('Mi', 'M') }} \
+  --cpu-shares={{ kube_cpu_reserved|regex_replace('m', '')  }} \
   -v /dev:/dev:rw \
   -v /etc/cni:/etc/cni:ro \
   -v /opt/cni:/opt/cni:ro \

roles/kubernetes/node/templates/kubelet.kubeadm.env.j2

@@ -1,4 +1,4 @@
-### Upstream source https://github.com/kubernetes/release/blob/master/debian/xenial/kubeadm/channel/stable/etc/systemd/system/kubelet.service.d/10-kubeadm.conf
+### Upstream source https://github.com/kubernetes/release/blob/master/debian/xenial/kubeadm/channel/stable/etc/systemd/system/kubelet.service.d/
 ### All upstream values should be present in this file
 
 # logging to stderr means we get it in the systemd journal
@@ -23,13 +23,14 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 {% if kubelet_authentication_token_webhook %}
 --authentication-token-webhook \
 {% endif %}
+{% if kubelet_authorization_mode_webhook %}
 --authorization-mode=Webhook \
+{% endif %}
 --client-ca-file={{ kube_cert_dir }}/ca.crt \
 --pod-manifest-path={{ kube_manifest_dir }} \
 --cadvisor-port={{ kube_cadvisor_port }} \
 {# end kubeadm specific settings #}
 --pod-infra-container-image={{ pod_infra_image_repo }}:{{ pod_infra_image_tag }} \
---kube-reserved cpu={{ kubelet_cpu_limit }},memory={{ kubelet_memory_limit|regex_replace('Mi', 'M') }} \
 --node-status-update-frequency={{ kubelet_status_update_frequency }} \
 --cgroup-driver={{ kubelet_cgroup_driver|default(kubelet_cgroup_driver_detected) }} \
 --docker-disable-shared-pid={{ kubelet_disable_shared_pid }} \

roles/kubernetes/preinstall/tasks/azure-credential-check.yml

@@ -44,6 +44,11 @@
     msg: "azure_vnet_name is missing"
   when: azure_vnet_name is not defined or azure_vnet_name == ""
 
+- name: check azure_vnet_resource_group value
+  fail:
+    msg: "azure_vnet_resource_group is missing"
+  when: azure_vnet_resource_group is not defined or azure_vnet_resource_group == ""
+
 - name: check azure_route_table_name value
   fail:
     msg: "azure_route_table_name is missing"

roles/kubernetes/preinstall/templates/azure-cloud-config.j2

@@ -8,5 +8,6 @@
   "subnetName": "{{ azure_subnet_name }}",
   "securityGroupName": "{{ azure_security_group_name }}",
   "vnetName": "{{ azure_vnet_name }}",
+  "vnetResourceGroup": "{{ azure_vnet_resource_group }}",
   "routeTableName": "{{ azure_route_table_name }}"
 }

roles/network_plugin/weave/tasks/main.yml

@@ -2,7 +2,6 @@
 - import_tasks: seed.yml
   when: weave_mode_seed
 
-
 - name: template weavenet conflist
   template:
     src: weavenet.conflist.j2

scripts/collect-info.yaml

@@ -114,7 +114,12 @@
       with_items: "{{logs}}"
 
     - name: Pack results and logs
-      local_action: raw GZIP=-9 tar --remove-files -cvzf {{dir|default(".")}}/logs.tar.gz -C /tmp collect-info
+      archive:
+        path: "/tmp/collect-info"
+        dest: "{{ dir|default('.') }}/logs.tar.gz"
+        remove: true
+      delegate_to: localhost
+      become: false
       run_once: true
 
     - name: Clean up collected command outputs

tests/files/gce_centos7-flannel-addons.yml

@@ -15,3 +15,4 @@ etcd_deployment_type: host
 deploy_netchecker: true
 kubedns_min_replicas: 1
 cloud_provider: gce
+kube_encrypt_secret_data: true