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Migration from Elasticsearch 6.8.2 to ES 7.x#

⚠️ IMPORTANT NOTE

  • This migration process is intended for single node of Elasticsearch database
  • The current version of this document is provided for testing purpose ONLY!
  • This guide has been written and tested to migrate data from ES 6.8.2 to ES 7.8.1, and Cortex 3.0.1 to Cortex 3.1.0 only!
  • This guide starts with Elasticsearch version 6.8.2 up and running, indexes and data. To test this guide, we recommend using a backup of you production server. (see Backup and Restore page for more information)
  • This guide is illustrated with Cortex index. The process is identical for Cortex, you just have to adjust index names.

Prerequisite#

The software jq is required to manipulate JSON and create new indexes. More information at https://stedolan.github.io/jq/.

Identify if your index should be reindexed#

You can easily identify if indexes should be reindexed or not. On the index named cortex_4 run the following command: 

curl -s http://127.0.0.1:9200/cortex_4?human | jq '.cortex_4.settings.index.version.created'

if the output is similar to "5xxxxxx" then reindexing is required, you should follow this guide.

If it is "6xxxxxx" then the index can be read by Elasticsearch 7.8.x. Upgrade Elasticsearch, and Cortex 3.1.0.

Migration guide#

Current status#

Current context is: - Elasticsearch 6.8.2 - Cortex 3.0.1

All up and running.

Start by identifying indices on you Elasticsearch instance.

curl  http://localhost:9200/_cat/indices\?v

The output should look like this: 

health status index           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   cortex_4    Y5rDTO23RBC_n6pjFP0-Qw   5   0       8531            8       13mb           13mb

The index name is cortex_4. Record this somewhere.

Stop services#

Before starting updating the database, lets stop applications:

sudo service cortex stop

Create a new index#

The First operation lies in creating a new index named new_cortex_4 with settings from current index cortex_4 (ensure to keep index version, needed for future upgrade).

curl -XPUT 'http://localhost:9200/new_cortex_4' \
  -H 'Content-Type: application/json' \
  -d "$(curl http://localhost:9200/cortex_4 |\
   jq '.cortex_4 |
   del(.settings.index.provided_name,
    .settings.index.creation_date,
    .settings.index.uuid,
    .settings.index.version,
    .settings.index.mapping.single_type,
    .mappings.doc._all)'
    )"

Check the new index is well created: 

curl -XGET http://localhost:9200/_cat/indices\?v

The output should look like this: 

health status index           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   new_cortex_4    wRX6rhzXTuW_F2wLNxqVyg   5   0          0            0      1.1kb          1.1kb
green  open   cortex_4        Y5rDTO23RBC_n6pjFP0-Qw   5   0       8531            8       13mb           13mb

Proceed to reindex#

Next operation lies in running the reindex command in the newly created index:

curl -XPOST -H 'Content-Type: application/json' http://localhost:9200/_reindex -d '{
  "conflicts": "proceed",
  "source": {
    "index": "cortex_4"
  },
  "dest": {
    "index": "new_cortex_4"
  }
}'

After a moment, you should get a similar output: 

{
    "took": 5119,
    "timed_out": false,
    "total": 5889,
    "updated": 0,
    "created": 5889,
    "deleted": 0,
    "batches": 6,
    "version_conflicts": 0,
    "noops": 0,
    "retries": {
        "bulk": 0,
        "search": 0
    },
    "throttled_millis": 0,
    "requests_per_second": -1.0,
    "throttled_until_millis": 0,
    "failures": []
}

Ensure new index has been created#

Run the following command, and ensure the new index is like the current one (size can vary):

curl -XGET http://localhost:9200/_cat/indices\?v

The output should look like this: 

health status index           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   new_cortex_4    wRX6rhzXTuW_F2wLNxqVyg   5   0       8531            0     12.6mb         12.6mb
green  open   cortex_4        Y5rDTO23RBC_n6pjFP0-Qw   5   0       8531            8       13mb           13mb

Delete old indices#

This is the thrilling part. Now the new index new_cortex_4 is created and similar to cortex_4, older indexes should be completely deleted from the database. To delete index named cortex_4, run the following command: 

curl -XDELETE http://localhost:9200/cortex_4

Run the same command for older indexes if exist (cortex_3, cortex_2....). Elasticsearch 7.x cannot run with index created with Elasticsearch 5.x.

Create an alias#

Before stopping Elasticsearch service, let’s create an alias to keep index names in the future. 

curl -XPOST -H 'Content-Type: application/json'  'http://localhost:9200/_aliases' -d '{
    "actions": [
        {
            "add": {
                "index": "new_cortex_4",
                "alias": "cortex_4"
            }
        }
    ]
}'

Doing so will allow Cortex 3.1.0 to find the index without updating the configuration file.

Check the alias has been well created by running the following command

curl -XGET http://localhost:9200/_alias?pretty

The output should look like:

{
  "new_cortex_4" : {
    "aliases" : {
      "cortex_4" : { }
    }
  }
}

Stop Elasticsearch version 6.8.2#

sudo service elasticsearch stop

Update Elasticsearch#

Update the configuration of Elastisearch. Configuration file should look like this:

[..]
http.host: 127.0.0.1
discovery.type: single-node
cluster.name: hive
script.allowed_types: inline
thread_pool.search.queue_size: 100000
thread_pool.write.queue_size: 10000

Now, upgrade Elasticsearch to version 7.x following the documentation for your operating system, and ensure the service start successfully.

Install or update to Cortex 3.1.0#

Destination path

The commands below use /tmp/ as the download path. Replace it with the full local directory path where you want to save the files.

  1. Download the installation package along with its SHA256 checksum and signature files.

    • Using Wget:

      wget -O /tmp/cortex_3.2.1-2_all.deb https://cortex.download.strangebee.com/3.2/deb/cortex_3.2.1-2_all.deb
wget -O /tmp/cortex_3.2.1-2_all.deb.sha256 https://cortex.download.strangebee.com/3.2/sha256/cortex_3.2.1-2_all.deb.sha256
wget -O /tmp/cortex_3.2.1-2_all.deb.asc https://cortex.download.strangebee.com/3.2/asc/cortex_3.2.1-2_all.deb.asc

      To download a specific version instead of the latest, use the following format:

      wget -O /tmp/<file_name>.deb https://cortex.download.strangebee.com/<major.minor_version>/deb/<file_name>.deb
wget -O /tmp/<file_name>.deb.sha256 https://cortex.download.strangebee.com/<major.minor_version>/sha256/<file_name>.deb.sha256
wget -O /tmp/<file_name>.deb.asc https://cortex.download.strangebee.com/<major.minor_version>/asc/<file_name>.deb.asc
      • Replace <file_name> with the full name of the versioned file you want to install. For example, use cortex_3.1.8-1_all.
      • Replace <major.minor_version> with the corresponding version directory. For example, use 3.1.

    • Using cURL:

      curl -o /tmp/cortex_3.2.1-2_all.deb https://cortex.download.strangebee.com/3.2/deb/cortex_3.2.1-2_all.deb
curl -o /tmp/cortex_3.2.1-2_all.deb.sha256 https://cortex.download.strangebee.com/3.2/sha256/cortex_3.2.1-2_all.deb.sha256
curl -o /tmp/cortex_3.2.1-2_all.deb.asc https://cortex.download.strangebee.com/3.2/asc/cortex_3.2.1-2_all.deb.asc

      To download a specific version instead of the latest, use the following format:

      curl -o /tmp/<file_name>.deb https://cortex.download.strangebee.com/<major.minor_version>/deb/<file_name>.deb
curl -o /tmp/<file_name>.deb.sha256 https://cortex.download.strangebee.com/<major.minor_version>/sha256/<file_name>.deb.sha256
curl -o /tmp/<file_name>.deb.asc https://cortex.download.strangebee.com/<major.minor_version>/asc/<file_name>.deb.asc
      • Replace <file_name> with the full name of the versioned file you want to install. For example, use cortex_3.1.8-1_all.
      • Replace <major.minor_version> with the corresponding version directory. For example, use 3.1.

  2. Verify the integrity of the downloaded package.

    • Check the SHA256 checksum by comparing it with the provided value.

      a. Generate the SHA256 checksum of your downloaded package.

      sha256sum /tmp/cortex_3.2.1-2_all.deb

      b. Compare the output hash with the official SHA256 value listed in the .sha256 file.

      c. If both hashes match exactly, the file integrity is verified. If not, the file may be corrupted or tampered with—don't proceed with installation, and contact the StrangeBee Security Team.

    • Verify the GPG signature using the public key.

      a. Download the public key at keys.download.strangebee.com using Wget or cURL.

      wget -O /tmp/strangebee.gpg https://keys.download.strangebee.com/latest/gpg/strangebee.gpg

      curl -o /tmp/strangebee.gpg https://keys.download.strangebee.com/latest/gpg/strangebee.gpg

      b. Import the key into your GPG keyring.

      gpg --import /tmp/strangebee.gpg

      c. Verify the downloaded package signature.

      gpg --verify /tmp/cortex_3.2.1-2_all.deb.asc /tmp/cortex_3.2.1-2_all.deb

      d. You should see a message stating indicating that the signature is valid and the package is authentic. If you see warnings or errors, don't install the package as its integrity or authenticity can't be confirmed. Report the issue to the StrangeBee Security Team.

  3. Install the package.

    • Using apt-get to manage dependencies automatically:

      sudo apt-get install /tmp/cortex_3.2.1-2_all.deb

    • Using dpkg:

      sudo dpkg -i /tmp/cortex_3.2.1-2_all.deb

      Missing dependencies

      While using dpkg, you might encounter warnings about missing dependencies during installation. To resolve this, run the commands described in the Required packages section of the installation guide.

  4. When switching from the previous repository-based installation, remove the old repository to avoid stale configurations.

    Why you should remove the old repository

    Keeping the old repository configuration can cause your system to download outdated or conflicting packages during updates, potentially breaking your installation or causing unexpected behavior.

    sudo rm /etc/apt/sources.list.d/strangebee.list
sudo apt-get update

Destination path

The commands below use /tmp/ as the download path. Replace it with the full local directory path where you want to save the files.

  1. Download the installation package along with its SHA256 checksum and signature files.

    • Using Wget:

      wget -O /tmp/cortex-3.2.1-2.noarch.rpm https://cortex.download.strangebee.com/3.2/rpm/cortex-3.2.1-2.noarch.rpm
wget -O /tmp/cortex-3.2.1-2.noarch.rpm.sha256 https://cortex.download.strangebee.com/3.2/sha256/cortex-3.2.1-2.noarch.rpm.sha256
wget -O /tmp/cortex-3.2.1-2.noarch.rpm.asc https://cortex.download.strangebee.com/3.2/asc/cortex-3.2.1-2.noarch.rpm.asc

      To download a specific version instead of the latest, use the following format:

      wget -O /tmp/<file_name>.noarch.rpm https://cortex.download.strangebee.com/<major.minor_version>/rpm/<file_name>.noarch.rpm
wget -O /tmp/<file_name>.noarch.rpm.sha256 https://cortex.download.strangebee.com/<major.minor_version>/sha256/<file_name>.noarch.rpm.sha256
wget -O /tmp/<file_name>.noarch.rpm.asc https://cortex.download.strangebee.com/<major.minor_version>/asc/<file_name>.noarch.rpm.asc
      • Replace <file_name> with the full name of the versioned file you want to install. For example, use cortex-3.1.8-1.
      • Replace <major.minor_version> with the corresponding version directory. For example, use 3.1.

    • Using cURL:

      curl -o /tmp/cortex-3.2.1-2.noarch.rpm https://cortex.download.strangebee.com/3.2/rpm/cortex-3.2.1-2.noarch.rpm
curl -o /tmp/cortex-3.2.1-2.noarch.rpm.sha256 https://cortex.download.strangebee.com/3.2/sha256/cortex-3.2.1-2.noarch.rpm.sha256
curl -o /tmp/cortex-3.2.1-2.noarch.rpm.asc https://cortex.download.strangebee.com/3.2/asc/cortex-3.2.1-2.noarch.rpm.asc

      To download a specific version instead of the latest, use the following format:

      curl -o /tmp/<file_name>.noarch.rpm https://cortex.download.strangebee.com/<major.minor_version>/rpm/<file_name>.noarch.rpm
curl -o /tmp/<file_name>.noarch.rpm.sha256 https://cortex.download.strangebee.com/<major.minor_version>/sha256/<file_name>.noarch.rpm.sha256
curl -o /tmp/<file_name>.noarch.rpm.asc https://cortex.download.strangebee.com/<major.minor_version>/asc/<file_name>.noarch.rpm.asc
      • Replace <file_name> with the full name of the versioned file you want to install. For example, use cortex-3.1.8-1.
      • Replace <major.minor_version> with the corresponding version directory. For example, use 3.1.

  2. Verify the integrity of the downloaded package.

    • Check the SHA256 checksum by comparing it with the provided value.

      a. Generate the SHA256 checksum of your downloaded package.

      sha256sum /tmp/cortex-3.2.1-2.noarch.rpm

      b. Compare the output hash with the official SHA256 value listed in the .sha256 file.

      c. If both hashes match exactly, the file integrity is verified. If not, the file may be corrupted or tampered with—don't proceed with installation, and contact the StrangeBee Security Team.

    • Verify the GPG signature using the public key.

      a. Download the public key at keys.download.strangebee.com using Wget or cURL.

      wget -O /tmp/strangebee.gpg https://keys.download.strangebee.com/latest/gpg/strangebee.gpg

      curl -o /tmp/strangebee.gpg https://keys.download.strangebee.com/latest/gpg/strangebee.gpg

      b. Import the key into your GPG keyring.

      gpg --import /tmp/strangebee.gpg

      c. Verify the downloaded package signature.

      gpg --verify /tmp/cortex-3.2.1-2.noarch.rpm.asc /tmp/cortex-3.2.1-2.noarch.rpm

      d. You should see a message stating indicating that the signature is valid and the package is authentic. If you see warnings or errors, don't install the package as its integrity or authenticity can't be confirmed. Report the issue to the StrangeBee Security Team.

  3. Install the package.

    • Using yum to manage dependencies automatically:

      sudo yum install /tmp/cortex-3.2.1-2.noarch.rpm

    • Using dnf to manage dependencies automatically:

      sudo dnf install /tmp/cortex-3.2.1-2.noarch.rpm

    • Using rpm:

      sudo rpm -ivh /tmp/cortex-3.2.1-2.noarch.rpm

      Missing dependencies

      While using rpm, you might encounter warnings about missing dependencies during installation. To resolve this, run the commands described in the Required packages section of the installation guide.

  4. When switching from the previous repository-based installation, deactivate the old repository to avoid stale configurations.

    Why you should deactivate the old repository

    Keeping the old repository configuration can cause your system to download outdated or conflicting packages during updates, potentially breaking your installation or causing unexpected behavior.

    a. Deactivate the repository.

    ```bash
sudo yum-config-manager --disable strangebee
```

    b. Optional: Remove the repository file.

    ```bash
sudo rm /etc/yum.repos.d/strangebee.repo
sudo yum clean all
```

Docker images are also provided on Docker Hub.

docker pull thehiveproject/cortex:3.1.0-1

⚠️ Starting from this version, Docker images don't contain analyzers anymore. Analyzers__/__Responders and Cortex have different life-cycles, their update including their dependencies should not be correlated to Cortex update.

It is recommended to use Docker version of analyzers : this can be done by binding Docker service docket inside Cortex container (run with -v /var/run/docker.sock:/var/run/docker.sock).

Update database#

Connect to TheHive (and Cortex), the maintenance page should ask to update.

Once updated, ensure a new index named cortex_5 has been created.

curl -XGET http://localhost:9200/_cat/indices\?v

The output should look like this: 

health status index           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   new_cortex_4 GV-3Y8QjTjWw0F-p2sjW6Q   5   0      30977            0       26mb           26mb
yellow open   cortex_5     Nz0vCKqhRK2xkx1t_WF-0g   5   1      30977            0     26.1mb         26.1mb