Openshift-4x-Redis.md

Get Credentials

HOST

❯ REDIS_HOSTS=$(oc -n iib-3scale-apim extract secret/backend-redis --keys=REDIS_STORAGE_SENTINEL_HOSTS --to=-)
# REDIS_STORAGE_SENTINEL_HOSTS

❯ echo $REDIS_HOSTS
redis://redis-storage-01.hm.example.com.br:26379,redis://redis-storage-02.hm.example.com.br:26379,redis://redis-storage-03.hm.example.com.br:26379

❯ FIRST_HOST=$(echo $REDIS_HOSTS| awk -F, '{print $1}'|  awk -F// '{print $2}' | awk -F: '{print $1}')

❯ echo $FIRST_HOST
redis-storage-01.hm.example.com.br

❯ REDIS_URL=$(oc -n iib-3scale-apim extract secret/backend-redis --keys=REDIS_STORAGE_URL --to=-)
# REDIS_STORAGE_URL

❯ echo $REDIS_URL
redis://:COKZjBba@mymaster:6379
❯ REDIS_USER=$(echo $REDIS_URL| awk -Fredis:// '{print $2}' |  awk -F@ '{print $1}' |  awk -F: '{print $1}')
❯ REDIS_PASS=$(echo $REDIS_URL| awk -Fredis:// '{print $2}' |  awk -F@ '{print $1}' |  awk -F: '{print $2}')

❯ echo $REDIS_USER

❯ echo $REDIS_PASS
COKZjBba

output variables

cat <<EOF
---
redis-cli -h $FIRST_HOST --pass "$REDIS_PASS" --scan > redis-full-scan.txt
---
EOF

SCAN

❯ redis-cli -h $FIRST_HOST --pass "$REDIS_PASS" --scan > redis-full-scan.txt

# or
❯ export REDISCLI_AUTH=$REDIS_PASS
❯ redis-cli -h $FIRST_HOST --scan > redis-full-scan.txt

# example to output the last 7 days, from now (now=2022/11/28)
❯ for i in {1..7} ; do gdate --date="$(date) -${i} day" "+%Y%m%d" ; done
20221128
20221127
20221126
20221125
20221124
20221123
20221122

# create a list with the last 7 days from now, like: YYYYMMDD|YYYYMMDD|YYYYMMDD|YYYYMMDD|
s=''; for i in {1..7} ; do s+=$(gdate --date="$(date) -${i} day" "+%Y%m%d");s+='|' ; done
# remove the last '|'
listWithoutLastPipe=${s%|*}

# create the files that are out of range from the last week
grep -v -E $listWithoutLastPipe redis-full-scan.txt > redis-full-files-to-be-deleted.txt

# get only the pattern of days
grep -Eo 'day:[[:digit:]]+' redis-days-to-be-deleted.txt

# delete the days that are not into the last week
while read day; do
    echo "$line"
done < redis-days-to-be-deleted.txt

References

• https://redis.com/thank-you/redisinsight-the-best-redis-gui-35/

• https://stackoverflow.com/questions/27658675/how-to-remove-last-n-characters-from-a-string-in-bash

• https://access.redhat.com/solutions/5798961

• https://stackoverflow.com/questions/51095892/redis-cli-scan-pattern-and-unlink-delete-multiple-patterns-in-a-single-call

  • sh-4.2$ redis-cli --scan --pattern '*:2022[^11]*' | wc -l
    100
    
    sh-4.2$ redis-cli --scan --pattern '*:2022[11]*' | wc -l
    218
    
    sh-4.2$ redis-cli --scan --pattern '*:2022[^11]*'  | xargs --delim='\n' redis-cli DEL
    (integer) 100
    
    sh-4.2$ redis-cli --scan --pattern '*:2022[11]*' | wc -l
    218
    
    sh-4.2$ redis-cli --scan --pattern '*:2022[^11]*' | wc -l
    0