OpenNebula - Key Aspects in CentOS

OpenNebula

Key Aspects of OpenNebula in CentOS Jaime Melis

Project Engineer

© OpenNebula Project. Creative Commons Attribution-NonCommercial-ShareAlike License

CentOS Dojo Cologne, Germany– August 4th 2014

2/16 OpenNebula - Latest Innovations in Private Cloud Computing!

Upcoming Release Features OpenNebula 4.8

●  OpenNebula 4.8 will be release this week! ●  New Virtual Network Model ●  New Address Range Concept ●  Identify federated zone in the logs (syslog) ●  Raw Device mapping datastore ●  Clone Image to another datastore ●  More Hybrid Clouds: Azure, SoftLayer (and EC2) ●  OneFlow and OneGate got shinier! ●  User Inputs ●  New VDCAdmin View


CentOS 7 Awesome!!

●  Newer Ruby! Newer Apache! Newer Kernel! Newer… Everything (it looks so shiny!)

●  Small footprint!

●  Already everywhere!

●  We really like modern and stable software

●  Amazing community for users and devs


Firewalld

CentOS 7 But …

NetworkManager

Systemd

●  New Challenges ●  Learn or Die! ●  Long nights coding…


OpenNebula in CentOS 7 Ruby

●  Ruby 1.9… better performance!! (we had this a lot in the code if RUBY_VERSION < 1.9 )

●  Missing gems from EPEL. We still need to run install_gems (any package maintainers in the room??) ●  sinatra ●  rack ●  thin ●  uuidtools ●  sequel ●  aws-sdk, softlayer, azure, treetop, parse-cron


OpenNebula in CentOS 7 Init Scripts

●  systemd-sysv… we owe you! (old system V scripts are compatible)

●  Full migration to systemd in the next release

●  Seriously, any package maintainers around?


OpenNebula in CentOS 7 Contextualization – Cloud Init

●  Cloud Init will be supported in this release ●  Patched DataSourceOpenNebula.py in the CentOS package (the

predictable network interfaces have been a predictable pain!) ●  Migrate from ifconfig to ip ●  Image requirements

●  Avahi unconfigures network ●  Acpid to shut down the VM ●  Sudoers: Defaults !requiretty

●  Actions ●  Network Contextualization ●  SSH Public Key ●  User Data ●  Hostname

●  One Image to rule the all! (AWS, OpenStack, OpenNebula, etc…)


OpenNebula in CentOS 7 Contextualization – Native Packages

●  Packages created by the OpenNebula Project (with fpm no srpm, sorry! – easy to fix though)

●  Actions ●  Network ●  DNS ●  SSH Public Key ●  SELinux ●  Mount Swap ●  Hostname ●  Execute Scripts

●  Easily extensible. Drop a script and you’re good to go.


OpenNebula in CentOS 7 KVM

●  Openebula-node-kvm works like a charm! ●  KVM version 1.5.3 (CentOS 6 had 0.12!) ●  Libvirt version 1.1.1 (CentOS 6 0.10) ●  … YES! It’s worth upgrading to CentOS 7!

NETWORK TOOLS

●  Replace vconfig with ip … type vlan … ●  Replace ifconfig with ip …

SELinux

●  oneadmin home is /var/lib/ne (no SSH allowed)


OpenNebula Storage GlusterFS

Libgfapi is supported (of course fuse is also supported) OpenNebula runs as `oneadmin`:

/etc/glusterfs/glusterd.vol ->

option rpc-auth-allow-insecure on

$ gluster volume set <volume> server.allow-insecure on

$ gluster volume set <volume> storage.owner-uid <oneadmin uid>

$ gluster volume set <volume> storage.owner-gid <oneadmin gid>


OpenNebula Storage GlusterFS /var/lib/glusterd/groups/virt -> quick-read=off

read-ahead=off

io-cache=off

stat-prefetch=on

eager-lock=enable

remote-dio=enable

quorum-type=auto

server.allow-insecure=on

server-quorum-type=server

$ gluster volume set <volume> group virt

$ mkdir -p /var/lib/one/datastores/0

$ mount -t gluster server:/volume /var/lib/one/datastores/0

$ chown oneadmin:oneadmin /var/lib/one/datastores/0

$ ln -s /var/lib/one/datastores/0 /var/lib/one/datastores/1


OpenNebula Storage GlusterFS

NAME = "glusterfs"

DS_MAD = fs

TM_MAD = shared

# the following line *must* be preset

DISK_TYPE = GLUSTER

GLUSTER_HOST = gluster_server:24007

GLUSTER_VOLUME = one_vol

CLONE_TARGET="SYSTEM"

LN_TARGET="NONE"

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OpenNebula - Key Aspects in CentOS