OpenNebula - Key Aspects in CentOS
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The document discusses the upcoming release of OpenNebula 4.8, highlighting new features such as a new virtual network model, improvements in hybrid cloud integration, and enhanced contextualization. It emphasizes the migration to CentOS 7, improvements in Ruby and KVM, and the introduction of GlusterFS support for storage. The release aims to deliver modern and stable software with an active community for users and developers.
OpenNebula - Key Aspects in CentOS
- 1. Cologne, Germany– August 4th 2014 OpenNebula CentOS Dojo Key Aspects of OpenNebula in CentOS Jaime Melis Project Engineer © OpenNebula Project. Creative Commons Attribution-NonCommercial-ShareAlike License
- 2. 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 OpenNebula - Latest Innovations in Private Cloud Computing!2/16
- 3. 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 OpenNebula - Latest Innovations in Private Cloud Computing!3/16
- 4. Firewalld CentOS 7 But … NetworkManager Systemd ● New Challenges ● Learn or Die! ● Long nights coding… OpenNebula - Latest Innovations in Private Cloud Computing!4/16
- 5. 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 - Latest Innovations in Private Cloud Computing!5/16
- 6. 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 - Latest Innovations in Private Cloud Computing!6/16
- 7. 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 - Latest Innovations in Private Cloud Computing!7/16
- 8. 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 - Latest Innovations in Private Cloud Computing!8/16
- 9. 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 - Latest Innovations in Private Cloud Computing!9/16
- 10. 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 - Latest Innovations in Private Cloud Computing!10/16
- 11. 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 - Latest Innovations in Private Cloud Computing!11/16
- 12. 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" OpenNebula - Latest Innovations in Private Cloud Computing!12/16