Ensure that new kb taken by the scanner are always clean.

[jjnicola]

What:
Ensure that new kb taken by the scanner are always clean.

Why:
To ensure that new kbs taken by the scanner are always clean.

How:
Enter to redis-cli and check that the only kb set "in used" is the kb 1, which contains the VTs cache

$ redis-cli -s /run/redis-openvas/redis.sock 
redis /run/redis-openvas/redis.sock> keys *
1) "GVM.__GlobalDBIndex"
redis /run/redis-openvas/redis.sock> HGETALL GVM.__GlobalDBIndex
1) "1"
2) "1"

Add some items to the the KB 2 and KB 3

redis /run/redis-openvas/redis.sock> SELECT 2
OK
redis /run/redis-openvas/redis.sock[2]> LPUSH a 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> LPUSH b 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> LPUSH b 123 1231 11222
(integer) 6
redis /run/redis-openvas/redis.sock[2]> LPUSH x 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> LPUSH c 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> LPUSH v 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> LPUSH w 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[2]> keys *
1) "a"
2) "w"
3) "b"
4) "v"
5) "x"
6) "c"
redis /run/redis-openvas/redis.sock[2]> SELECT 3
OK
redis /run/redis-openvas/redis.sock[3]> LPUSH w 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH v 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH b 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH x 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH a 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH as 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asd 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asdf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asdgf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asdvdsgf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asd23vdsgf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asd23htvdsgf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asd23htvjdsgf 123 1231 11222
(integer) 3
redis /run/redis-openvas/redis.sock[3]> LPUSH asd23htvdjdsgf 123 1231 11222
(integer) 3

redis /run/redis-openvas/redis.sock> info keyspace
# Keyspace
db0:keys=1,expires=0,avg_ttl=0
db1:keys=179237,expires=0,avg_ttl=0
db2:keys=6,expires=0,avg_ttl=0
db3:keys=14,expires=0,avg_ttl=0

Run a scan. As the only kb set as "in used" is the kb 1, kb 2 and kb 3 will be taken for the task.
Once the openvas started and scans the host, check in the kb 2 and kb 3 if the items you added above were deleted (kb clean)

redis /run/redis-openvas/redis.sock[2]> SELECT 2
OK
redis /run/redis-openvas/redis.sock[2]> keys *
1) "internal/scanid"
2) "internal/7f24d936-8879-41b4-83ef-195a55129345/scanprefs"
3) "internal/ec2f19c9-32dd-4fde-b9b4-7d6f07a7a53c/globalscanid"
4) "internal/7f24d936-8879-41b4-83ef-195a55129345"

redis /run/redis-openvas/redis.sock[2]> SELECT 3
OK
redis /run/redis-openvas/redis.sock[3]> keys as*
(empty list or set)
redis /run/redis-openvas/redis.sock[3]> info keyspace
# Keyspace
db0:keys=1,expires=0,avg_ttl=0
db1:keys=179237,expires=0,avg_ttl=0
db2:keys=5,expires=0,avg_ttl=0
db3:keys=71,expires=0,avg_ttl=0

Checklist:

• Tests
• CHANGELOG Entry