kelseyhightower

$ tar -xvf hello-0.0.1-linux-amd64.aci 
x rootfs
x rootfs/bin
x rootfs/bin/hello
x manifest
hello $ cat manifest 
{"acKind":"ImageManifest","acVersion":"0.1.1","name":"coreos.com/hello","labels":[{"name":"version","value":"0.0.1"},{"name":"arch","value":"amd64"},{"name":"os","value":"linux"}],"app":{"exec":["/bin/hello"],"user":"root","group":"root","ports":[{"name":"www","protocol":"tcp","port":5000,"socketActivated":false}]}}

kelseyhightower

$ sudo ./bin/rkt fetch example.com/hello:0.0.1
rkt: starting to discover app img example.com/hello:0.0.1
rkt: starting to fetch img from http://example.com/images/example.com/hello-0.0.1-linux-amd64.aci
Downloading aci: [                                             ] 1.45 KB/1.26 MB
keystore: checking signature openpgp: signature made by unknown entity

$ sudo mv ~/3028A353FEA3A704 /etc/rkt/trustedkeys/prefix.d/coreos.com/hello/3028A353FEA3A704
$ sudo ./bin/rkt fetch example.com/hello:0.0.1
rkt: starting to discover app img example.com/hello:0.0.1
rkt: starting to fetch img from http://example.com/images/example.com/hello-0.0.1-linux-amd64.aci

kelseyhightower

{
  "name": "ipv4allocator",
  "range": "10.10.0.1/24",
  "command": {
    "add": ["/usr/bin/ipv4allocator", "-c {conf}", "-n {net-name}", "-id {cont-id}", "-netns {netns}", "-i {if-name}", "add"]
  }
}

kelseyhightower

Edit the dhcpd.conf

```
sudo vim /Library/Preferences/VMware\ Fusion/vmnet8/dhcpd.conf
```
Add `filename "http://192.168.12.1:4777?mac=${net0/mac}&serial=${serial}&asset=${asset}";`

```
 Configuration file for ISC 2.0 vmnet-dhcpd operating on vmnet8.
#

kelseyhightower

Edit the dhcpd.conf

sudo vim /Library/Preferences/VMware\ Fusion/vmnet8/dhcpd.conf

Add filename "http://192.168.12.1:4777?mac=${net0/mac}&serial=${serial}&asset=${asset}";

 Configuration file for ISC 2.0 vmnet-dhcpd operating on vmnet8.
#

kelseyhightower

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2 (ACI gzip/tar)
Comment: GPGTools - https://gpgtools.org

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kelseyhightower

Key-Value API

Read consistency

Starting with etcd 2.0.0 read operations provide the following consistency guarantees:

The consistent read guarantees the sequential consistency within one client that talks to one etcd server. Read/Write from one client to one etcd member should be observed in order. If one client write a value to a etcd server successfully, it should be able to get the value out of the server immediately.

Each etcd member will proxy the request to leader and only return the result to user after the result is applied on the local member. Thus after the write succeed, the user is guaranteed to see the value on the member it sent the request to.

kelseyhightower

    - name: etcd.service
      command: start
      content: |
        [Unit]
        Description=etcd

        [Service]
        User=etcd
        PermissionsStartOnly=true
        ExecStartPre=/usr/bin/wget -N -P /opt/bin http://192.168.0.1/etcd

kelseyhightower

demo $ ./bin/etcd-down 
stopping core2...
stopping core1...
stopping core0...
demo $ ./bin/etcd-revert 
reverting core5 to base snapshot
reverting core4 to base snapshot
reverting core3 to base snapshot
reverting core2 to base snapshot
reverting core1 to base snapshot

kelseyhightower

[Unit]
Description=etcd

[Service]
User=etcd
PermissionsStartOnly=true
ExecStartPre=/usr/bin/wget -N -P /opt/bin http://192.168.0.1/etcd
ExecStartPre=/usr/bin/wget -N -P /opt/bin http://192.168.0.1/etcdctl
ExecStartPre=/usr/bin/chmod +x /opt/bin/etcd
ExecStartPre=/usr/bin/chmod +x /opt/bin/etcdctl