Change the backend setup variable used for setting up cache #71
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Description
Currently we use the following variable for setting up cache:
gluster_infra_cache_vars:
- vgname: vg_vdc
cachedisk: '/dev/vdd'
cachelvname: 'cachelv_thinpool_vg_vdc'
cachethinpoolname: 'thinpool_vg_vdc'
cachelvsize: '50G'
cachemetalvsize: '2G'
cachemetalvname: 'cache_thinpool_vg_vdc'
cachemode: 'writethrough'
We currently mention the disk which has to be used for setting up the cache.
And internally use this device to extend the volume group vg_vdc. However since Ansible 2.8
this will not work. We have to also mention the disks which are currently part of the volume group vg_vdc.
For example if vg_vdc is made of /dev/vdc then the variable should look like:
gluster_infra_cache_vars:
- vgname: vg_vdc
cachedisk: '/dev/vdc,/dev/vdd'
cachelvname: 'cachelv_thinpool_vg_vdc'
cachethinpoolname: 'thinpool_vg_vdc'
cachelvsize: '50G'
cachemetalvsize: '2G'
cachemetalvname: 'cache_thinpool_vg_vdc'
cachemode: 'writethrough'
We have to make this change while setting up cache for GlusterFS backend.
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