usrbinkat

Bare Metal:

• Talos
• Cert Manager
• Rook Ceph
• Kubevirt
• Containerized Data Importer
• Cluster Network Addons Operator
• Cluster API

likid0

#Check bucket limits:
$ radosgw-admin bucket limit check | jq '.[].buckets[].fill_status' | uniq
$ radosgw-admin bucket limit check | jq '.[].buckets[].objects_per_shard'  | sort -n | uniq


#Default WARN Thresholds:
"osd_deep_scrub_large_omap_object_key_threshold": "2000000",
"osd_deep_scrub_large_omap_object_value_sum_threshold": "1073741824"  #1G

#Warnings you get in the cluster log:

djoreilly

Multicast on OpenStack

The following works with Neutron VLAN provider networks, and requires configuration on the physical switches. Multicast works on br-int because the ML2 OVS driver/agent uses OVS in standalone mode (no external controller). The packets on br-int hit the NORMAL flow action, and so get treated by the ovs-vswitchd code that does IGMP snooping (when enabled). All IGMP packets are sent to the slow path (userspace ovs-vswitchd).

The following will not work on Neutron tunnel backed networks (VxLAN, GRE), as the neutron-openvswitch-agent hardcodes flows on br-tun that treats multicast the same as broadcasts and the NORMAL action is not used.

+----------------------------+      +----------------------------+
|      +----+    +----+      |      |      +----+    +----+      |
|      | VM |    | VM |      |      |      | VM |    | VM |      |
|      +-+--+    +--+-+      |      |      +-+--+    +--+-+      |

pshchelo

# kudos to dzaku at consolechars.wordpress.com

### MOUNT qcow2 image with lvm partitions

# ensure nbd can handle that many partitions
sudo modprobe nbd max_part=8

# present image as block device through NBD
sudo qemu-nbd --connect=/dev/nbd0 <image.qcow2>