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Merge pull request #829 from bogdando/opts

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Rework group/role vars
This commit is contained in:
Antoine Legrand 2017-02-23 10:39:43 +01:00 committed by GitHub
commit 1b7c272109
17 changed files with 263 additions and 201 deletions
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1
contrib/terraform/group_vars Symbolic link
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../../inventory/group_vars

1
contrib/terraform/openstack/group_vars/all.yml
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@ -1 +0,0 @@
../../../../inventory/group_vars/all.yml

4
docs/ansible.md
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@ -67,7 +67,9 @@ Group vars and overriding variables precedence
----------------------------------------------
The group variables to control main deployment options are located in the directory ``inventory/group_vars``.
Optional variables are located in the ```inventory/group_vars/all.yml```.
Mandatory variables that are common for at least one role (or a node group) can be found in the
```inventory/group_vars/k8s-cluster.yml```.
There are also role vars for docker, rkt, kubernetes preinstall and master roles.
According to the [ansible docs](http://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable),
those cannot be overriden from the group vars. In order to override, one should use

237
inventory/group_vars/all.yml
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@ -1,176 +1,60 @@
# Valid bootstrap options (required): ubuntu, coreos, centos, none
bootstrap_os: none
# Directory where the binaries will be installed
bin_dir: /usr/local/bin
## The access_ip variable is used to define how other nodes should access
## the node. This is used in flannel to allow other flannel nodes to see
## this node for example. The access_ip is really useful AWS and Google
## environments where the nodes are accessed remotely by the "public" ip,
## but don't know about that address themselves.
#access_ip: 1.1.1.1
# Kubernetes configuration dirs and system namespace.
# Those are where all the additional config stuff goes
# the kubernetes normally puts in /srv/kubernets.
# This puts them in a sane location and namespace.
# Editing those values will almost surely break something.
kube_config_dir: /etc/kubernetes
kube_script_dir: "{{ bin_dir }}/kubernetes-scripts"
kube_manifest_dir: "{{ kube_config_dir }}/manifests"
system_namespace: kube-system
### LOADBALANCING AND ACCESS MODES
## Enable multiaccess to configure etcd clients to access all of the etcd members directly
## as the "http://hostX:port, http://hostY:port, ..." and ignore the proxy loadbalancers.
## This may be the case if clients support and loadbalance multiple etcd servers natively.
#etcd_multiaccess: true
# This is where all the cert scripts and certs will be located
kube_cert_dir: "{{ kube_config_dir }}/ssl"
## External LB example config
## apiserver_loadbalancer_domain_name: "elb.some.domain"
#loadbalancer_apiserver:
# address: 1.2.3.4
# port: 1234
# This is where all of the bearer tokens will be stored
kube_token_dir: "{{ kube_config_dir }}/tokens"
## Internal loadbalancers for apiservers
#loadbalancer_apiserver_localhost: true
# This is where to save basic auth file
kube_users_dir: "{{ kube_config_dir }}/users"
## Local loadbalancer should use this port instead, if defined.
## Defaults to kube_apiserver_port (443)
#nginx_kube_apiserver_port: 8443
## Change this to use another Kubernetes version, e.g. a current beta release
kube_version: v1.5.3
### OTHER OPTIONAL VARIABLES
## For some things, kubelet needs to load kernel modules. For example, dynamic kernel services are needed
## for mounting persistent volumes into containers. These may not be loaded by preinstall kubernetes
## processes. For example, ceph and rbd backed volumes. Set to true to allow kubelet to load kernel
## modules.
# kubelet_load_modules: false
# Where the binaries will be downloaded.
# Note: ensure that you've enough disk space (about 1G)
local_release_dir: "/tmp/releases"
# Random shifts for retrying failed ops like pushing/downloading
retry_stagger: 5
## Internal network total size. This is the prefix of the
## entire network. Must be unused in your environment.
#kube_network_prefix: 18
# Uncomment this line for CoreOS only.
# Directory where python binary is installed
# ansible_python_interpreter: "/opt/bin/python"
# This is the group that the cert creation scripts chgrp the
# cert files to. Not really changable...
kube_cert_group: kube-cert
# Cluster Loglevel configuration
kube_log_level: 2
# Kubernetes 1.5 added a new flag to the apiserver to disable anonymous auth. In previos versions, anonymous auth was
# not implemented. As the new flag defaults to true, we have to explicitly disable it. Change this line if you want the
# 1.5 default behavior. The flag is actually only added if the used kubernetes version is >= 1.5
kube_api_anonymous_auth: false
#
# For some things, kubelet needs to load kernel modules. For example, dynamic kernel services are needed
# for mounting persistent volumes into containers. These may not be loaded by preinstall kubernetes
# processes. For example, ceph and rbd backed volumes. Set to true to allow kubelet to load kernel
# modules.
#
kubelet_load_modules: false
# Users to create for basic auth in Kubernetes API via HTTP
kube_api_pwd: "changeme"
kube_users:
kube:
pass: "{{kube_api_pwd}}"
role: admin
root:
pass: "{{kube_api_pwd}}"
role: admin
# Kubernetes cluster name, also will be used as DNS domain
cluster_name: cluster.local
# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
ndots: 2
# Deploy netchecker app to verify DNS resolve as an HTTP service
deploy_netchecker: false
# For some environments, each node has a publicly accessible
# address and an address it should bind services to. These are
# really inventory level variables, but described here for consistency.
#
# When advertising access, the access_ip will be used, but will defer to
# ip and then the default ansible ip when unspecified.
#
# When binding to restrict access, the ip variable will be used, but will
# defer to the default ansible ip when unspecified.
#
# The ip variable is used for specific address binding, e.g. listen address
# for etcd. This is use to help with environments like Vagrant or multi-nic
# systems where one address should be preferred over another.
# ip: 10.2.2.2
#
# The access_ip variable is used to define how other nodes should access
# the node. This is used in flannel to allow other flannel nodes to see
# this node for example. The access_ip is really useful AWS and Google
# environments where the nodes are accessed remotely by the "public" ip,
# but don't know about that address themselves.
# access_ip: 1.1.1.1
# Etcd access modes:
# Enable multiaccess to configure clients to access all of the etcd members directly
# as the "http://hostX:port, http://hostY:port, ..." and ignore the proxy loadbalancers.
# This may be the case if clients support and loadbalance multiple etcd servers natively.
etcd_multiaccess: true
# Assume there are no internal loadbalancers for apiservers exist and listen on
# kube_apiserver_port (default 443)
loadbalancer_apiserver_localhost: true
# Choose network plugin (calico, canal, weave or flannel)
# Can also be set to 'cloud', which lets the cloud provider setup appropriate routing
kube_network_plugin: calico
# Kubernetes internal network for services, unused block of space.
kube_service_addresses: 10.233.0.0/18
# internal network. When used, it will assign IP
# addresses from this range to individual pods.
# This network must be unused in your network infrastructure!
kube_pods_subnet: 10.233.64.0/18
# internal network total size (optional). This is the prefix of the
# entire network. Must be unused in your environment.
# kube_network_prefix: 18
# internal network node size allocation (optional). This is the size allocated
# to each node on your network. With these defaults you should have
# room for 4096 nodes with 254 pods per node.
kube_network_node_prefix: 24
# With calico it is possible to distributed routes with border routers of the datacenter.
peer_with_router: false
# Warning : enabling router peering will disable calico's default behavior ('node mesh').
# The subnets of each nodes will be distributed by the datacenter router
# API Server service IP address in Kubernetes internal network.
kube_apiserver_ip: "{{ kube_service_addresses|ipaddr('net')|ipaddr(1)|ipaddr('address') }}"
# The port the API Server will be listening on.
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# local loadbalancer should use this port instead - default to kube_apiserver_port
nginx_kube_apiserver_port: "{{ kube_apiserver_port }}"
# Internal DNS configuration.
# Kubernetes can create and mainatain its own DNS server to resolve service names
# into appropriate IP addresses. It's highly advisable to run such DNS server,
# as it greatly simplifies configuration of your applications - you can use
# service names instead of magic environment variables.
# Can be dnsmasq_kubedns, kubedns or none
dns_mode: dnsmasq_kubedns
# Can be docker_dns, host_resolvconf or none
resolvconf_mode: docker_dns
## With calico it is possible to distributed routes with border routers of the datacenter.
## Warning : enabling router peering will disable calico's default behavior ('node mesh').
## The subnets of each nodes will be distributed by the datacenter router
#peer_with_router: false
## Upstream dns servers used by dnsmasq
#upstream_dns_servers:
# - 8.8.8.8
# - 8.8.4.4
dns_domain: "{{ cluster_name }}"
## There are some changes specific to the cloud providers
## for instance we need to encapsulate packets with some network plugins
## If set the possible values are either 'gce', 'aws', 'azure' or 'openstack'
## When openstack is used make sure to source in the openstack credentials
## like you would do when using nova-client before starting the playbook.
#cloud_provider:
# Ip address of the kubernetes skydns service
skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
# There are some changes specific to the cloud providers
# for instance we need to encapsulate packets with some network plugins
# If set the possible values are either 'gce', 'aws', 'azure' or 'openstack'
# When openstack is used make sure to source in the openstack credentials
# like you would do when using nova-client before starting the playbook.
# When azure is used, you need to also set the following variables.
# cloud_provider:
# see docs/azure.md for details on how to get these values
## When azure is used, you need to also set the following variables.
## see docs/azure.md for details on how to get these values
#azure_tenant_id:
#azure_subscription_id:
#azure_aad_client_id:
@ -182,46 +66,25 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
#azure_vnet_name:
#azure_route_table_name:
## Set these proxy values in order to update docker daemon to use proxies
# http_proxy: ""
# https_proxy: ""
# no_proxy: ""
# Path used to store Docker data
docker_daemon_graph: "/var/lib/docker"
## A string of extra options to pass to the docker daemon.
## This string should be exactly as you wish it to appear.
## An obvious use case is allowing insecure-registry access
## to self hosted registries like so:
docker_options: "--insecure-registry={{ kube_service_addresses }} --graph={{ docker_daemon_graph }} --iptables=false"
docker_bin_dir: "/usr/bin"
#http_proxy: ""
#https_proxy: ""
#no_proxy: ""
## Uncomment this if you want to force overlay/overlay2 as docker storage driver
## Please note that overlay2 is only supported on newer kernels
#docker_storage_options: -s overlay2
# K8s image pull policy (imagePullPolicy)
k8s_image_pull_policy: IfNotPresent
# default packages to install within the cluster
kpm_packages: []
## Default packages to install within the cluster, f.e:
#kpm_packages:
# - name: kube-system/grafana
# Settings for containerized control plane (etcd/kubelet)
rkt_version: 1.21.0
etcd_deployment_type: docker
kubelet_deployment_type: docker
vault_deployment_type: docker
efk_enabled: false
## Certificate Management
## This setting determines whether certs are generated via scripts or whether a
## cluster of Hashicorp's Vault is started to issue certificates (using etcd
## as a backend). Options are "script" or "vault"
cert_management: script
#cert_management: script
# Please specify true if you want to perform a kernel upgrade
kernel_upgrade: false
## Please specify true if you want to perform a kernel upgrade
#kernel_upgrade: false

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inventory/group_vars/calico-rr.yml Normal file
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@ -0,0 +1,33 @@
## Required for bootstrap-os/preinstall/download roles and setting facts
# Valid bootstrap options (required): ubuntu, coreos, centos, none
bootstrap_os: none
# Directory where the binaries will be installed
bin_dir: /usr/local/bin
docker_bin_dir: /usr/bin
# Where the binaries will be downloaded.
# Note: ensure that you've enough disk space (about 1G)
local_release_dir: "/tmp/releases"
# Random shifts for retrying failed ops like pushing/downloading
retry_stagger: 5
kube_service_addresses: 10.233.0.0/18
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# DNS configuration.
# Kubernetes cluster name, also will be used as DNS domain
cluster_name: cluster.local
# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
ndots: 2
# Can be dnsmasq_kubedns, kubedns or none
dns_mode: dnsmasq_kubedns
# Can be docker_dns, host_resolvconf or none
resolvconf_mode: docker_dns
# Deploy netchecker app to verify DNS resolve as an HTTP service
deploy_netchecker: false
# Ip address of the kubernetes skydns service
skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
dns_domain: "{{ cluster_name }}"

38
inventory/group_vars/etcd.yml Normal file
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@ -0,0 +1,38 @@
## Required for bootstrap-os/preinstall/download roles and setting facts
# Valid bootstrap options (required): ubuntu, coreos, centos, none
bootstrap_os: none
# Directory where the binaries will be installed
bin_dir: /usr/local/bin
docker_bin_dir: /usr/bin
# Where the binaries will be downloaded.
# Note: ensure that you've enough disk space (about 1G)
local_release_dir: "/tmp/releases"
# Random shifts for retrying failed ops like pushing/downloading
retry_stagger: 5
# Settings for containerized control plane (etcd/secrets)
etcd_deployment_type: docker
cert_management: script
vault_deployment_type: docker
kube_service_addresses: 10.233.0.0/18
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# DNS configuration.
# Kubernetes cluster name, also will be used as DNS domain
cluster_name: cluster.local
# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
ndots: 2
# Can be dnsmasq_kubedns, kubedns or none
dns_mode: dnsmasq_kubedns
# Can be docker_dns, host_resolvconf or none
resolvconf_mode: docker_dns
# Deploy netchecker app to verify DNS resolve as an HTTP service
deploy_netchecker: false
# Ip address of the kubernetes skydns service
skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
dns_domain: "{{ cluster_name }}"

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inventory/group_vars/k8s-cluster.yml Normal file
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@ -0,0 +1,113 @@
# Valid bootstrap options (required): ubuntu, coreos, centos, none
bootstrap_os: none
# Directory where the binaries will be installed
bin_dir: /usr/local/bin
# Kubernetes configuration dirs and system namespace.
# Those are where all the additional config stuff goes
# the kubernetes normally puts in /srv/kubernets.
# This puts them in a sane location and namespace.
# Editting those values will almost surely break something.
kube_config_dir: /etc/kubernetes
kube_script_dir: "{{ bin_dir }}/kubernetes-scripts"
kube_manifest_dir: "{{ kube_config_dir }}/manifests"
system_namespace: kube-system
# Logging directory (sysvinit systems)
kube_log_dir: "/var/log/kubernetes"
# This is where all the cert scripts and certs will be located
kube_cert_dir: "{{ kube_config_dir }}/ssl"
# This is where all of the bearer tokens will be stored
kube_token_dir: "{{ kube_config_dir }}/tokens"
# This is where to save basic auth file
kube_users_dir: "{{ kube_config_dir }}/users"
## Change this to use another Kubernetes version, e.g. a current beta release
kube_version: v1.5.3
# Where the binaries will be downloaded.
# Note: ensure that you've enough disk space (about 1G)
local_release_dir: "/tmp/releases"
# Random shifts for retrying failed ops like pushing/downloading
retry_stagger: 5
# This is the group that the cert creation scripts chgrp the
# cert files to. Not really changable...
kube_cert_group: kube-cert
# Cluster Loglevel configuration
kube_log_level: 2
# Users to create for basic auth in Kubernetes API via HTTP
kube_api_pwd: "changeme"
kube_users:
kube:
pass: "{{kube_api_pwd}}"
role: admin
root:
pass: "{{kube_api_pwd}}"
role: admin
# Choose network plugin (calico, weave or flannel)
# Can also be set to 'cloud', which lets the cloud provider setup appropriate routing
kube_network_plugin: calico
# Kubernetes internal network for services, unused block of space.
kube_service_addresses: 10.233.0.0/18
# internal network. When used, it will assign IP
# addresses from this range to individual pods.
# This network must be unused in your network infrastructure!
kube_pods_subnet: 10.233.64.0/18
# internal network node size allocation (optional). This is the size allocated
# to each node on your network. With these defaults you should have
# room for 4096 nodes with 254 pods per node.
kube_network_node_prefix: 24
# The port the API Server will be listening on.
kube_apiserver_ip: "{{ kube_service_addresses|ipaddr('net')|ipaddr(1)|ipaddr('address') }}"
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# DNS configuration.
# Kubernetes cluster name, also will be used as DNS domain
cluster_name: cluster.local
# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
ndots: 2
# Can be dnsmasq_kubedns, kubedns or none
dns_mode: dnsmasq_kubedns
# Can be docker_dns, host_resolvconf or none
resolvconf_mode: docker_dns
# Deploy netchecker app to verify DNS resolve as an HTTP service
deploy_netchecker: false
# Ip address of the kubernetes skydns service
skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
dns_domain: "{{ cluster_name }}"
# Path used to store Docker data
docker_daemon_graph: "/var/lib/docker"
## A string of extra options to pass to the docker daemon.
## This string should be exactly as you wish it to appear.
## An obvious use case is allowing insecure-registry access
## to self hosted registries like so:
docker_options: "--insecure-registry={{ kube_service_addresses }} --graph={{ docker_daemon_graph }} --iptables=false"
docker_bin_dir: "/usr/bin"
# Settings for containerized control plane (etcd/kubelet/secrets)
etcd_deployment_type: docker
kubelet_deployment_type: docker
cert_management: script
vault_deployment_type: docker
# K8s image pull policy (imagePullPolicy)
k8s_image_pull_policy: IfNotPresent
# Monitoring apps for k8s
efk_enabled: false

9
inventory/group_vars/kube-master.yml Normal file
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@ -0,0 +1,9 @@
# Kubernetes 1.5 added a new flag to the apiserver to disable anonymous auth. In previos versions, anonymous auth was
# not implemented. As the new flag defaults to true, we have to explicetely disable it. Change this line if you want the
# 1.5 default behavior. The flag is actually only added if the used kubernetes version is >= 1.5
kube_api_anonymous_auth: false
# Kubernetes internal network for services, unused block of space.
kube_service_addresses: 10.233.0.0/18
kube_version: v1.5.3

2
roles/adduser/defaults/main.yml
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@ -1,4 +1,6 @@
---
kube_cert_group: kube-cert
addusers:
etcd:
name: etcd

1
roles/download/defaults/main.yml
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@ -18,6 +18,7 @@ download_localhost: False
download_always_pull: False
# Versions
kube_version: v1.5.3
etcd_version: v3.0.6
#TODO(mattymo): Move calico versions to roles/network_plugins/calico/defaults
# after migration to container download

4
roles/kubernetes-apps/kpm/tasks/main.yml
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@ -4,7 +4,7 @@
name: "kpm"
state: "present"
version: "0.16.1"
when: kpm_packages | length > 0
when: kpm_packages|default([])| length > 0
- name: manage kubernetes applications
kpm:
@ -14,7 +14,7 @@
version: "{{item.version | default(omit)}}"
variables: "{{item.variables | default(omit)}}"
name: "{{item.name}}"
with_items: "{{kpm_packages}}"
with_items: "{{kpm_packages|default([])}}"
register: kpmresults
environment:
PATH: "{{ ansible_env.PATH }}:{{ bin_dir }}"

2
roles/kubernetes/node/templates/nginx.conf.j2
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@ -16,7 +16,7 @@ stream {
}
server {
listen 127.0.0.1:{{ nginx_kube_apiserver_port }};
listen 127.0.0.1:{{ nginx_kube_apiserver_port|default(kube_apiserver_port) }};
proxy_pass kube_apiserver;
proxy_timeout 10m;
proxy_connect_timeout 1s;

5
roles/kubernetes/preinstall/defaults/main.yml
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@ -17,6 +17,8 @@ common_required_pkgs:
# GCE docker repository
disable_ipv6_dns: false
kube_cert_group: kube-cert
kube_config_dir: /etc/kubernetes
# For the openstack integration kubelet will need credentials to access
# openstack apis like nova and cinder. Per default this values will be
@ -27,9 +29,6 @@ openstack_password: "{{ lookup('env','OS_PASSWORD') }}"
openstack_region: "{{ lookup('env','OS_REGION_NAME') }}"
openstack_tenant_id: "{{ lookup('env','OS_TENANT_ID')|default(lookup('env','OS_PROJECT_ID'),true) }}"
# All clients access each node individually, instead of using a load balancer.
etcd_multiaccess: true
# Container Linux by CoreOS cloud init config file to define /etc/resolv.conf content
# for hostnet pods and infra needs
resolveconf_cloud_init_conf: /etc/resolveconf_cloud_init.conf

6
roles/kubernetes/preinstall/tasks/set_facts.yml
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@ -20,8 +20,8 @@
- set_fact:
kube_apiserver_endpoint: |-
{% if not is_kube_master and loadbalancer_apiserver_localhost -%}
https://localhost:{{ nginx_kube_apiserver_port }}
{% if not is_kube_master and loadbalancer_apiserver_localhost|default(false) -%}
https://localhost:{{ nginx_kube_apiserver_port|default(kube_apiserver_port) }}
{%- elif is_kube_master and loadbalancer_apiserver is not defined -%}
http://127.0.0.1:{{ kube_apiserver_insecure_port }}
{%- else -%}
@ -57,7 +57,7 @@
{%- endfor %}
- set_fact:
etcd_access_endpoint: "{% if etcd_multiaccess %}{{ etcd_access_addresses }}{% else %}{{ etcd_endpoint }}{% endif %}"
etcd_access_endpoint: "{% if etcd_multiaccess|default(true) %}{{ etcd_access_addresses }}{% else %}{{ etcd_endpoint }}{% endif %}"
- set_fact:
etcd_member_name: |-

2
roles/kubernetes/secrets/defaults/main.yml Normal file
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@ -0,0 +1,2 @@
---
kube_cert_group: kube-cert

4
roles/network_plugin/calico/tasks/main.yml
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@ -223,7 +223,7 @@
"apiVersion": "v1",
"metadata": {"node": "{{ inventory_hostname }}",
"scope": "node",
"peerIP": "{{ hostvars[item]["calico_rr_ip"]|default(hostvars[item]["ip"]) }}"}
"peerIP": "{{ hostvars[item]["calico_rr_ip"]|default(hostvars[item]["ip"])|default(hostvars[item]["ansible_default_ipv4.address"]) }}"}
}'
| {{ bin_dir }}/calicoctl create --skip-exists -f -
with_items: "{{ groups['calico-rr'] | default([]) }}"
@ -245,7 +245,7 @@
peer_with_router|default(false) and inventory_hostname in groups['k8s-cluster'])
- name: Calico (old) | Configure peering with route reflectors
shell: "{{ bin_dir }}/calicoctl node bgp peer add {{ hostvars[item]['calico_rr_ip']|default(hostvars[item]['ip']) }} as {{ local_as | default(global_as_num) }}"
shell: "{{ bin_dir }}/calicoctl node bgp peer add {{ hostvars[item]['calico_rr_ip']|default(hostvars[item]['ip'])|default(hostvars[item]['ansible_default_ipv4.address']) }} as {{ local_as | default(global_as_num) }}"
with_items: "{{ groups['calico-rr'] | default([]) }}"
when: (legacy_calicoctl and
peer_with_calico_rr|default(false) and inventory_hostname in groups['k8s-cluster']

2
roles/rkt/defaults/main.yml
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@ -1,6 +1,6 @@
---
rkt_version: 1.12.0
rkt_version: 1.21.0
rkt_pkg_version: "{{ rkt_version }}-1"
rkt_download_src: https://github.com/coreos/rkt
rkt_download_url: "{{ rkt_download_src }}/releases/download/v{{ rkt_version }}"