Openebs.ci postgresql pod went crashloop backoff

What happened:

Some times postgresql pod went crashloopbackoff .

Platform :
GCP

logs of postgresql pod :

Working on primary...
+ case "$PG_MODE" in
+ echo 'Working on primary...'
+ initialize_primary
+ echo initialize_primary
initialize_primary
+ '[' '!' -f /pgdata/postgresql-0/postgresql.conf ']'
+ '[' -f /pgconf/postgresql.conf ']'
+ date
+ postgres -D /pgdata/postgresql-0
Mon Dec 30 07:10:50 UTC 2019
+ [[ -v PGAUDIT_ANALYZE ]]
+ wait
2019-12-30 02:10:50 EST [40]: [1-1] user=,db=,app=,client=FATAL:  could not remove old lock file "postmaster.pid": Read-only file system
2019-12-30 02:10:50 EST [40]: [2-1] user=,db=,app=,client=HINT:  The file seems accidentally left over, but it could not be removed. Please remove the file by hand and try again.
Exiting...at end
+ echo 'Exiting...at end

cstor pool pod also went to crashloopbackoff state in openebs namespace

logs :

W1230 07:13:17.948706       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:20.952801       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:23.956290       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:26.959823       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:29.963835       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:32.967654       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:35.971751       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:38.974637       1 pool.go:54] Failed to get zpool status, error: exit status 1, pool container may be initializing,  retry after 2s
W1230 07:13:40.978918       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:43.982456       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:46.986487       1 pool.go:60] No pool available, pool must be creating, retry after 3s
W1230 07:13:49.990016       1 pool.go:60] No pool available, pool must be creating, retry after 3s