# Check for upcoming deprecations you have to adjust before ugprading
curl --insecure -uelastic:${es_password} https://127.0.0.1:9200/_migration/deprecations| jq

# Check if indexes need migration
curl --insecure -uelastic:${es_password} https://127.0.0.1:9200/_migration/system_features| jq

# Migrate endpoints, if they say "MIGRATION NEEDED" or "ERROR"
curl --insecure -uelastic:${es_password} -XPOST https://127.0.0.1:9200/_migration/system_features | jq

# Remove ingest-attachment plugin (Elasticsearch has that on board starting with version 8)
/usr/share/elasticsearch/bin/elasticsearch-plugin remove ingest-attachment

# Switch repository source from Elasticsearch 7 to 8
rm /etc/apt/sources.list.d/elastic-7.x.list
curl -fsSL https://artifacts.elastic.co/GPG-KEY-elasticsearch | \
  gpg --dearmor | tee /usr/share/keyrings/elasticsearch-keyring.gpg \
  && chmod 644 /usr/share/keyrings/elasticsearch-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | tee /etc/apt/sources.list.d/elastic-8.x.list

# Switch repository source from Elasticsearch 8 to 9
rm /etc/apt/sources.list.d/elastic-8.x.list
echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/9.x/apt stable main" | tee /etc/apt/sources.list.d/elastic-9.x.list