race condition in download role under vagrant
using a shared folder can cause race conditions for the download role as it tries to download files on all the nodes to the same shared path. This adds a flag to run the tasks in the download role on just one node.
This commit is contained in:
Paul Czarkowski
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5240465f39
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ba615ff94e
4 changed files with 14 additions and 54 deletions
57
README.md
57
README.md
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@ -2,7 +2,7 @@
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# Deploy a production ready kubernetes cluster
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##Deploy a production ready kubernetes cluster
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- Can be deployed on **AWS, GCE, OpenStack or Baremetal**
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- **High available** cluster
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@ -10,61 +10,12 @@
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- Support most popular **Linux distributions**
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- **Continuous integration tests**
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# Getting Started
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To deploy the cluster you can use :
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## kargo-cli
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[**kargo-cli**](https://github.com/kubespray/kargo-cli)
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## Vagrant
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Assuming you have Vagrant (1.8+) installed with virtualbox (it may work
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with vmware, but is untested) you should be able to launch a 3 node
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Kubernetes cluster by simply running `$ vagrant up`.
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This will spin up 3 VMs and install kubernetes on them. Once they are
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completed you can connect to any of them by running
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`$ vagrant ssh k8s-0[1..3]`.
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```
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$ vagrant up
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Bringing machine 'k8s-01' up with 'virtualbox' provider...
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Bringing machine 'k8s-02' up with 'virtualbox' provider...
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Bringing machine 'k8s-03' up with 'virtualbox' provider...
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==> k8s-01: Box 'bento/ubuntu-14.04' could not be found. Attempting to find and install...
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...
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...
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k8s-03: Running ansible-playbook...
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PLAY [k8s-cluster] *************************************************************
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TASK [setup] *******************************************************************
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ok: [k8s-03]
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ok: [k8s-01]
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ok: [k8s-02]
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...
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...
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PLAY RECAP *********************************************************************
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k8s-01 : ok=157 changed=66 unreachable=0 failed=0
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k8s-02 : ok=137 changed=59 unreachable=0 failed=0
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k8s-03 : ok=86 changed=51 unreachable=0 failed=0
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$ vagrant ssh k8s-01
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vagrant@k8s-01:~$ kubectl get nodes
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NAME STATUS AGE
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k8s-01 Ready 45s
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k8s-02 Ready 45s
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k8s-03 Ready 45s
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```
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## Ansible
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**Ansible** usual commands
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# Further Reading
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* [**kargo-cli**](https://github.com/kubespray/kargo-cli)
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* **vagrant** by simply running `vagrant up`
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* **Ansible** usual commands
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A complete **documentation** can be found [**here**](https://docs.kubespray.io)
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4
Vagrantfile
vendored
4
Vagrantfile
vendored
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@ -79,7 +79,8 @@ Vagrant.configure("2") do |config|
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"access_ip" => ip,
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"flannel_interface" => ip,
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"flannel_backend_type" => "host-gw",
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"local_release_dir" => "/vagrant/temp"
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"local_release_dir" => "/vagrant/temp",
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"download_run_once" => "True"
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}
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config.vm.network :private_network, ip: ip
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@ -96,6 +97,7 @@ Vagrant.configure("2") do |config|
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ansible.host_key_checking = false
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ansible.raw_arguments = ["--forks=#{$num_instances}"]
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ansible.host_vars = host_vars
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#ansible.tags = ['download']
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ansible.groups = {
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# The first three nodes should be etcd servers
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"etcd" => ["k8s-0[1:3]"],
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@ -1,6 +1,9 @@
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---
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local_release_dir: /tmp
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# if this is set to true will only download files once
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download_run_once: False
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# Versions
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kube_version: "v1.2.4"
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etcd_version: v2.2.5
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@ -2,6 +2,7 @@
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- name: Create dest directories
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file: path={{local_release_dir}}/{{item.dest|dirname}} state=directory recurse=yes
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with_items: "{{ downloads }}"
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run_once: "{{ download_run_once|bool }}"
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- name: Download items
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get_url:
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@ -11,6 +12,7 @@
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owner: "{{ item.owner|default(omit) }}"
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mode: "{{ item.mode|default(omit) }}"
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with_items: "{{ downloads }}"
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run_once: "{{ download_run_once|bool }}"
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- name: Extract archives
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unarchive:
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@ -21,6 +23,7 @@
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copy: no
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when: "{{item.unarchive is defined and item.unarchive == True}}"
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with_items: "{{ downloads }}"
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run_once: "{{ download_run_once|bool }}"
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- name: Fix permissions
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file:
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@ -30,3 +33,4 @@
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mode: "{{ item.mode|default(omit) }}"
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when: "{{item.unarchive is not defined or item.unarchive == False}}"
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with_items: "{{ downloads }}"
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run_once: "{{ download_run_once|bool }}"
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