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Ceph assemblies are now better reorganized to follow a simple rule/struct. A main ceph-cluster migration assembly is included in main, and it contains a quick intro and the (ordered) list of procedures (including the cardinality section that is critical here and will be improved in a follow up patch). This way the ceph doc is very easy to access and maintain. There are also fixes to wrong references (e.g. horizon != Ceph dashboard). Signed-off-by: Francesco Pantano <[email protected]>
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ifdef::context[:parent-context: {context}] | ||
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[id="ceph-migration_{context}"] | ||
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= Migrating the {CephCluster} Cluster | ||
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:context: migrating-ceph | ||
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:toc: left | ||
:toclevels: 3 | ||
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ifdef::parent-context[:context: {parent-context}] | ||
ifndef::parent-context[:!context:] | ||
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In the context of data plane adoption, where the {rhos_prev_long} | ||
({OpenStackShort}) services are redeployed in {OpenShift}, you migrate a | ||
{OpenStackPreviousInstaller}-deployed {CephCluster} cluster by using a process | ||
called “externalizing” the {CephCluster} cluster. | ||
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There are two deployment topologies that include an internal {CephCluster} | ||
cluster: | ||
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* {OpenStackShort} includes dedicated {CephCluster} nodes to host object | ||
storage daemons (OSDs) | ||
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* Hyperconverged Infrastructure (HCI), where Compute and Storage services are | ||
colocated on hyperconverged nodes | ||
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In either scenario, there are some {Ceph} processes that are deployed on | ||
{OpenStackShort} Controller nodes: {Ceph} monitors, Ceph Object Gateway (RGW), | ||
Rados Block Device (RBD), Ceph Metadata Server (MDS), Ceph Dashboard, and NFS | ||
Ganesha. To migrate your {CephCluster} cluster, you must decommission the | ||
Controller nodes and move the {Ceph} daemons to a set of target nodes that are | ||
already part of the {CephCluster} cluster. | ||
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include::../modules/con_ceph-daemon-cardinality.adoc[leveloffset=+1] | ||
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include::assembly_migrating-ceph-monitoring-stack.adoc[leveloffset=+1] | ||
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include::../modules/proc_migrating-ceph-mds.adoc[leveloffset=+1] | ||
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include::assembly_migrating-ceph-rgw.adoc[leveloffset=+1] | ||
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include::assembly_migrating-ceph-rbd.adoc[leveloffset=+1] |
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