| # Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source. | |
| # Will include all hosts the playbook is run on. | |
| # Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html | |
| - name: "Build hosts file" | |
| lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present | |
| when: hostvars[item].ansible_default_ipv4.address is defined | |
| with_items: groups['all'] |
| package main | |
| import ( | |
| "net" | |
| "os/exec" | |
| "github.com/k0kubun/pp" | |
| ) | |
| func Hosts(cidr string) ([]string, error) { |
| // struct filed only support uint* and string | |
| // for string, there should be a value to represent the length of string | |
| // packed | |
| func WriteStructToBuffer(buffer *bytes.Buffer, data interface{}) error { | |
| v := reflect.Indirect(reflect.ValueOf(data)) | |
| if v.Kind() != reflect.Struct { | |
| return errors.New("invaild type Not a struct") | |
| } |
| diff --git a/Makefile b/Makefile | |
| index 00730a98..28d23f11 100644 | |
| --- a/Makefile | |
| +++ b/Makefile | |
| @@ -39,7 +39,7 @@ GOARM=7 | |
| # List images with gcloud alpha container images list-tags gcr.io/google_containers/kube-cross | |
| KUBE_CROSS_TAG=v1.8.3-1 | |
| -IPTABLES_VERSION=1.4.21 | |
| +IPTABLES_VERSION=1.6.1 |
| ddns-update-style none; | |
| deny bootp; #default | |
| authoritative; | |
| include "/etc/dhcp/ipxe-option-space.conf"; | |
| # GREEN (private network) | |
| subnet 10.1.1.0 netmask 255.255.255.0 { | |
| range 10.1.1.100 10.1.1.199; | |
| option subnet-mask 255.255.255.0; |
A running example of the code from:
This gist creates a working example from blog post, and a alternate example using simple worker pool.
TLDR: if you want simple and controlled concurrency use a worker pool.
Yes - you can create a Kubernetes cluster with Raspberry Pis with the default operating system Raspbian. Carry on using all the tools and packages you're used to with the officially-supported OS.