a redstack technology company oracle emea database partner of the year oracle partner of the year...

A RedStack Technology Company

Oracle EMEA Database Partner of the Year Oracle Partner of the year 2010 & 2012

+44 (0) 844 811 [email protected]

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Linux Containers

Jason ArneilSolutions Architect

e-DBA Ltd

Oracle Partner of the year 2010 & 2012


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Oracle EMEA Database Partner of the Year

Linux Containers

Types of Virtualisation

Linux Containers

Demo

Resource Management



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Oracle EMEA Database Partner of the Year Oracle EMEA Database Partner of the Year

jarneil.wordpress.com

@jarneil



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About Red Stack Technology



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Virtualisation

HardwareVirtualisation

O/SPartitions

SoftwareVirtualisation



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“containers can just be thought of as a collection of processes, separated from the main host processes via a set of resource namespaces and constrained via control groups resource tunables”



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Hardware

Standard Host O/S

O/S Virtulisation

Cont

aine

r 1

Cont

aine

r 2

Hardware

Driver Support

Hypervisor

Virtual Machine Monitor

VM2

Guest O/S

VM1

Guest O/S



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Linux Containers



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2.6.39-400.210.2.el6uek



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Why?



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Control Groups



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cgroup



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subsystem



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lssubsys -am



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cpuset /cgroup/cpusetcpu /cgroup/cpucpuacct /cgroup/cpuacctmemory /cgroup/memorydevices /cgroup/devicesfreezer /cgroup/freezernet_cls /cgroup/net_clsblkio /cgroup/blkio



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hierachy



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Name Spaces



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LXC



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LXC is a userspace interface for the Linux kernel containment features.



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lxc-create –n cont1 –t oracle -- --release=6.latest



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lxc-create: No config file specified, using the default config /etc/lxc/default.confHost is OracleServer 6.4Create configuration file /container/cont1/configDownloading release 6.latest for x86_64Loaded plugins: refresh-packagekit, securityol6_latest | 1.4 kB 00:00 ol6_latest/primary | 33 MB 00:04 ol6_latest 22589/22589Setting up Install ProcessResolving Dependencies--> Running transaction check---> Package chkconfig.x86_64 0:1.3.49.3-2.el6_4.1 will be installed--> Processing Dependency: libc.so.6(GLIBC_2.2.5)(64bit) for package: chkconfig-1.3.49.3-2.el6_4.1.x86_64--> Processing Dependency: libc.so.6(GLIBC_2.8)(64bit) for package: chkconfig-1.3.49.3-2.el6_4.1.x86_64..



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Complete!Rebuilding rpm databaseConfiguring container for Oracle Linux 6.4Added container user:oracle password:oracleAdded container user:root password:rootContainer : /container/cont1/rootfsConfig : /container/cont1/configNetwork : eth0 (veth) on virbr0'oracle' template installed'cont1' created



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templates



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ls -lh /container/cont1/

-rw-r--r--. 1 root root 2.1K Nov 25 09:06 config-rw-r--r--. 1 root root 195 Nov 25 09:06 fstabdr-xr-xr-x. 21 root root 4.0K Nov 25 09:08 rootfs



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lxc-start -n cont1 –d



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lxc-ls



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lxc-info –n cont1



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ps –elf --forest



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root 2771 2748 0 4738 1164 0 10:04 pts/0 00:00:00 | \_ lxc-start -n cont1root 2775 2771 0 4819 1496 0 10:04 ? 00:00:00 | \_ /sbin/initroot 3005 2775 0 2291 604 0 10:04 ? 00:00:00 | \_ /sbin/dhclient -H cont1 -1 -q -lf /var/lib/dhclient/dhclient-eth0.leases -pf /var/run/dhclient-eth0.pid eth0root 3028 2775 0 44888 1344 0 10:04 ? 00:00:00 | \_ /sbin/rsyslogd -i /var/run/syslogd.pid -c 5root 3070 2775 0 16575 1160 0 10:04 ? 00:00:00 | \_ /usr/sbin/sshdroot 3081 2775 0 1027 576 0 10:04 pts/1 00:00:00 | \_ /sbin/mingetty /dev/tty1root 3083 2775 0 1027 572 0 10:04 pts/2 00:00:00 | \_ /sbin/mingetty /dev/tty2root 3085 2775 0 1027 572 0 10:04 pts/3 00:00:00 | \_ /sbin/mingetty /dev/tty3root 3087 2775 0 1027 576 0 10:04 pts/4 00:00:00 | \_ /sbin/mingetty /dev/tty4root 3208 2775 0 1027 568 0 10:23 pts/5 00:00:00 | \_ /sbin/mingetty /dev/console



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lxc-console -n cont1



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lxc-clone -o cont1 –n cont2



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Tweaking configurationCopying rootfs...Updating rootfs...'cont2' created



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lxc-freeze -n cont1



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lxc-unfreeze -n cont1



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lxc-cgroup -n cont1 state-object



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lxc-shutdown -n cont1



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lxc-stop -n cont1



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lxc-destroy -n cont1



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Q & A

a redstack technology company oracle emea database partner of the year oracle partner of the year...

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