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restore-db-steps.md

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Steps to restore Config DB

Tested on Contrail All-in-one Centos 7.4 running R3.2.9 version

  1. Backup the config db, using the below command [Could be on customer's cluster]
 python db_json_exim.py --export-to config-db-dump.json
  1. Below steps to restore the backed up DB, performed in step 1.
    • Stop all the contrail services including zookeeper 
      service supervisor-vrouter stop
service supervisor-control stop
service supervisor-analytics stop
service supervisor-config stop
service supervisor-database stop
service contrail-database stop
service zookeeper stop
service kafka stop
    • Backup the existing cassandra database 
      mkdir -p /var/lib/cassandra/data-orig
mkdir -p /var/lib/cassandra/commitlog-orig
mkdir -p /var/lib/cassandra/saved_caches-orig
cp -R /var/lib/cassandra/data/* /var/lib/cassandra/data-orig
cp -R /var/lib/cassandra/commitlog/* /var/lib/cassandra/commitlog-orig
cp -R /var/lib/cassandra/saved_caches/* /var/lib/cassandra/saved_caches-orig
rm -rf /var/lib/cassandra/data/*
rm -rf /var/lib/cassandra/commitlog/*
rm -rf /var/lib/cassandra/save_caches/*
    • Backup the existing zookeeper database 
      mkdir -p /var/lib/zookeeper/data/version-2-orig
cp -R /var/lib/zookeeper/data/version-2/* /var/lib/zookeeper/data/version-2-orig
rm -rf /var/lib/zookeeper/data/version-2/*
    • Start cassandra and zookeeper services 
      service contrail-database start
service zookeeper start
    • Import DB 
      python db_json_exim.py --import-to config-db-dump.json
    • Start all the contrail services 
      service supervisor-control start
service supervisor-analytics start
service supervisor-config start
service supervisor-database start
service supervisor-vrouter start
service kafka start
    • Verify all the contrail services 
      contrail-status

Reference

Contrail Wiki