Hi All,
We had a fiber cut tonight between 2 data centers, and a ceph cluster didn't
do very well :( We ended up with 98% of PGs as down.
This setup has 2 data centers defined, with 4 copies across both, and a
minimum of size of 1. We have 1 mon/mgr in each DC, with one in a 3rd data
center connected to each of the other 2 by VPN.
When I did a pg query on the PG's that were stuck it said they were blocked
from coming up because they couldn't contact 2 of the OSDs (located in the
other data center that it was unable to reach).. but the other 2 were fine.
I'm at a loss because this was exactly the thing we thought we had set it up
to prevent.. and with size = 4 and min_size set = 1 I understood that it
would continue without a problem? :(
Crush map is below .. if anyone has any ideas? I would sincerely appreciate
it :)
Thanks!
Dale
# begin crush map
tunable choose_local_tries 0
tunable choose_local_fallback_tries 0
tunable choose_total_tries 50
tunable chooseleaf_descend_once 1
tunable chooseleaf_vary_r 1
tunable straw_calc_version 1
# devices
device 0 osd.0 class ssd
device 1 osd.1 class ssd
device 2 osd.2 class ssd
device 3 osd.3 class ssd
device 4 osd.4 class ssd
device 5 osd.5 class ssd
device 6 osd.6 class ssd
device 7 osd.7 class ssd
device 8 osd.8 class ssd
device 9 osd.9 class ssd
device 10 osd.10 class ssd
device 11 osd.11 class ssd
device 12 osd.12 class ssd
device 13 osd.13 class ssd
device 14 osd.14 class ssd
device 15 osd.15 class ssd
device 16 osd.16 class ssd
device 17 osd.17 class ssd
device 18 osd.18 class ssd
device 19 osd.19 class ssd
device 20 osd.20 class ssd
device 21 osd.21 class ssd
device 22 osd.22 class ssd
device 23 osd.23 class ssd
device 24 osd.24 class ssd
device 25 osd.25 class ssd
device 26 osd.26 class ssd
device 27 osd.27 class ssd
device 28 osd.28 class ssd
device 29 osd.29 class ssd
device 30 osd.30 class ssd
device 31 osd.31 class ssd
device 32 osd.32 class ssd
device 33 osd.33 class ssd
device 34 osd.34 class ssd
device 35 osd.35 class ssd
device 36 osd.36 class ssd
device 37 osd.37 class ssd
device 38 osd.38 class ssd
device 39 osd.39 class ssd
device 40 osd.40 class ssd
device 41 osd.41 class ssd
device 42 osd.42 class ssd
device 43 osd.43 class ssd
device 44 osd.44 class ssd
device 45 osd.45 class ssd
device 46 osd.46 class ssd
device 47 osd.47 class ssd
device 49 osd.49 class ssd
# types
type 0 osd
type 1 host
type 2 chassis
type 3 rack
type 4 row
type 5 pdu
type 6 pod
type 7 room
type 8 datacenter
type 9 region
type 10 root
# buckets
host Pnode01 {
id -8 # do not change unnecessarily
id -9 class ssd # do not change unnecessarily
# weight 0.000
alg straw2
hash 0 # rjenkins1
}
host node01 {
id -2 # do not change unnecessarily
id -15 class ssd # do not change unnecessarily
# weight 14.537
alg straw2
hash 0 # rjenkins1
item osd.4 weight 1.817
item osd.1 weight 1.817
item osd.3 weight 1.817
item osd.2 weight 1.817
item osd.6 weight 1.817
item osd.9 weight 1.817
item osd.5 weight 1.817
item osd.0 weight 1.818
}
host node02 {
id -3 # do not change unnecessarily
id -16 class ssd # do not change unnecessarily
# weight 14.536
alg straw2
hash 0 # rjenkins1
item osd.10 weight 1.817
item osd.11 weight 1.817
item osd.12 weight 1.817
item osd.13 weight 1.817
item osd.14 weight 1.817
item osd.15 weight 1.817
item osd.16 weight 1.817
item osd.19 weight 1.817
}
host node03 {
id -4 # do not change unnecessarily
id -17 class ssd # do not change unnecessarily
# weight 14.536
alg straw2
hash 0 # rjenkins1
item osd.20 weight 1.817
item osd.21 weight 1.817
item osd.22 weight 1.817
item osd.23 weight 1.817
item osd.25 weight 1.817
item osd.26 weight 1.817
item osd.29 weight 1.817
item osd.24 weight 1.817
}
datacenter EDM1 {
id -11 # do not change unnecessarily
id -14 class ssd # do not change unnecessarily
# weight 43.609
alg straw
hash 0 # rjenkins1
item node01 weight 14.537
item node02 weight 14.536
item node03 weight 14.536
}
host node04 {
id -5 # do not change unnecessarily
id -18 class ssd # do not change unnecessarily
# weight 14.536
alg straw2
hash 0 # rjenkins1
item osd.30 weight 1.817
item osd.31 weight 1.817
item osd.32 weight 1.817
item osd.33 weight 1.817
item osd.34 weight 1.817
item osd.35 weight 1.817
item osd.36 weight 1.817
item osd.39 weight 1.817
}
host node05 {
id -6 # do not change unnecessarily
id -19 class ssd # do not change unnecessarily
# weight 14.536
alg straw2
hash 0 # rjenkins1
item osd.40 weight 1.817
item osd.41 weight 1.817
item osd.42 weight 1.817
item osd.43 weight 1.817
item osd.44 weight 1.817
item osd.45 weight 1.817
item osd.46 weight 1.817
item osd.49 weight 1.817
}
host node06 {
id -7 # do not change unnecessarily
id -20 class ssd # do not change unnecessarily
# weight 16.353
alg straw2
hash 0 # rjenkins1
item osd.47 weight 1.817
item osd.37 weight 1.817
item osd.27 weight 1.817
item osd.38 weight 1.817
item osd.7 weight 1.817
item osd.28 weight 1.817
item osd.8 weight 1.817
item osd.17 weight 1.817
item osd.18 weight 1.817
}
datacenter EDM3 {
id -12 # do not change unnecessarily
id -13 class ssd # do not change unnecessarily
# weight 45.425
alg straw
hash 0 # rjenkins1
item node04 weight 14.536
item node05 weight 14.536
item node06 weight 16.353
}
datacenter EDM2 {
id -10 # do not change unnecessarily
id -22 class ssd # do not change unnecessarily
# weight 0.000
alg straw
hash 0 # rjenkins1
}
root default {
id -1 # do not change unnecessarily
id -21 class ssd # do not change unnecessarily
# weight 89.034
alg straw2
hash 0 # rjenkins1
item Pnode01 weight 0.000
item EDM1 weight 43.609
item EDM3 weight 45.425
item EDM2 weight 0.000
}
# rules
rule replicated_ruleset {
id 0
type replicated
min_size 1
max_size 10
step take default
step choose firstn 2 type datacenter
step chooseleaf firstn 2 type host
step emit
}
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