I'm not actually issuing any when starting up the new instance. None are
needed; the instance is booted from an image which has the zpool configuration
stored within, so simply starts and sees that the devices aren't available,
which become available after I've attached the EBS device.
Before the image was bundled the following zpool commands were issued with the
EBS volumes attached at "10" (primary), "6" (log main) and "7" (log mirror):
# zpool create foo c7d16 log mirror c7d6 c7d7
# zpool status
pool: mnt
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
mnt ONLINE 0 0 0
c7d1p0 ONLINE 0 0 0
c7d2p0 ONLINE 0 0 0
errors: No known data errors
pool: foo
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
foo ONLINE 0 0 0
c7d16 ONLINE 0 0 0
logs ONLINE 0 0 0
mirror ONLINE 0 0 0
c7d6 ONLINE 0 0 0
c7d7 ONLINE 0 0 0
errors: No known data errors
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c7d0s0 ONLINE 0 0 0
errors: No known data errors
After booting a new instance based on the image I see this:
# zpool status
pool: foo
state: UNAVAIL
status: One or more devices could not be opened. There are insufficient
replicas for the pool to continue functioning.
action: Attach the missing device and online it using 'zpool online'.
see: http://www.sun.com/msg/ZFS-8000-3C
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
foo UNAVAIL 0 0 0 insufficient replicas
c7d16 UNAVAIL 0 0 0 cannot open
logs UNAVAIL 0 0 0 insufficient replicas
mirror UNAVAIL 0 0 0 insufficient replicas
c7d6 UNAVAIL 0 0 0 cannot open
c7d7 UNAVAIL 0 0 0 cannot open
Which changes to "ONLINE" (as previous) when the EBS volumes are attached.
After reading through the documentation a little more, could this be due to the
zpool.cache file being stored on the image (& therefore refreshed after each
boot) rather than somewhere more persistent?
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