Author Archives: Loic Dachary

Public OpenStack providers useable within the hour

The OpenStack marketplace provides a list of OpenStack public clouds, a few of which enable the user to launch an instance at most one hour after registration. Enter Cloud Suite has a 2GB RAM, 2 CPU, 40GB Disk instance for … Continue reading

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Setting a custom name server on an OpenStack instance

In an OpenStack tenant that is not allowed to create a network with neutron net-create, the name server can be set via cloudinit. The resolv-conf module although documented in the examples is not always available. It can be worked around … Continue reading

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OpenStack instance name based on its IP address

A DNS has a set of pre-defined names such as: … the-re018 the-re019 … If nova fixed-ip-reserve is denied by the OpenStack policy and neutron net-create is not available to create a network with the subnet that … Continue reading

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Delete the last port of an OpenStack router

When trying to delete an OpenStack subnet and the associated router, the command neutron router-delete complains because of the port allocated for the gateway and the port of the gateway cannot be removed with neutron port-delete because it is owned … Continue reading

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OpenStack script to pre-allocate fixed IPs

The script allocates ports and indirectly gets fixed IPs from the DHCP server. The ports are named openstack000, openstack001 etc. and they are displayed in a format suitable for dnsmasq: $ python –count 2 –net fsf-lan | \ … Continue reading

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create / delete an OpenStack instance with python-openstackclient

The python-openstackclient library has an example that provides the basic structure for a new command (the auth_url problem workaround may be needed). To create a virtual machine with 1GB RAM, 1CPU, ubuntu-14.04, using the teuthology keypair on the fsf-lan network, … Continue reading

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Teuthology docker targets hack (5/5)

The teuthology container hack is improved to run teuthology-suite. For instance: ./virtualenv/bin/teuthology-suite \ –distro ubuntu \ –suite-dir $HOME/software/ceph/ceph-qa-suite \ –config-file docker-integration/teuthology.yaml \ –machine-type container \ –owner \ –filter ‘rados:basic/{clusters/fixed-2.yaml fs/btrfs.yaml \ msgr-failures/few.yaml tasks/rados_cls_all.yaml}’ \ –suite rados/basic –ceph ANY \ … Continue reading

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Ceph Jerasure and ISA plugins benchmarks

In Ceph, a pool can be configured to use erasure coding instead of replication to save space. When used with Intel processors, the default Jerasure plugin that computes erasure code can be replaced by the ISA plugin for better write … Continue reading

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Improving Ceph python scripts tests

The Ceph command line and ceph-disk helper are python scripts for which there are integration tests ( and It would be useful to add unit tests and pep8 checks. It can be done by creating a python module instead … Continue reading

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Testing if a jenkins container finished booting

When running Jenkins as a docker container for test purposes, it is necessary to verify the Jenkins master is fully functional before running the first test cases. The http interface can be tested with a call to the API such … Continue reading

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