Using EUMETSAT data buckets (fresh data pool)

Available EUMETSAT data buckets are listed below with the corresponding mount point in case of using ready workflow. The buckets are available from the whole EWC (including ECMWF side) without credentials.

EUMETSAT Data Buckets:

1. ERA5 subset contains following parameters: O3, q, t, u, v from all model levels, r from all pressure levels, and mwd1, mwd2, mwd3, mwp1, mwp2, mwp3, swh, swh1, swh2, swh3, 10u, 10v, 2d, 2t,, and ci from surface ↩

OPERA data:

Regarding the data, please refer the EUMETNET documentation

GeoRing data:

Following GeoRing source data are available in the EWC data buckets. Please note that these are not included in the workflow to mount data via FUSE mount.

Using the data directly from workloads 

It is advisable to use the data directly from workloads (scripts / applications). Please consult e.g.

• s3 using Python libraries
• Object storage: How to use s3cmd and s3fs
• S3 from command line

for more help. 

Mounting the buckets using FUSE

Following describes how to mount EUMETSAT data buckets as FUSE mounts. The possibility to mount the buckets into as filesystem is provided to as convenience. Readers are advised to note that mounting buckets via FUSE will provide significantly worse performance than accessing the data directly from workloads, for example using python.  Whenever possible, users are advised to use the buckets directly from the workloads.

Tenants having Morpheus account at EUMETSAT Morpheus, can mount the data buckets using ready workflow. This article describes how to run the workflow and how to mount the data manually. One can naturally use the same steps to any other buckets as well by modifying bucket name, service endpoint, credentials, and potentially project id.

Using the Workflow

1. Go to instances and select the instance of interest
   
2. Select Actions → Run Workflow
   
   
3. Select Mount EUMETSAT databuckets from Workflow drop-down menu and click Execute. Command options are not needed.
   
   

You can then follow the workflow from the output or by going to Instance History tab. After the workflow is executed, you can access the data at /eumetsatdata.

Manual mount

Following steps are using ASCAT data as an example. Please modify the commands to mount any other bucket. 

1. Make sure you have latest rclone installed

   curl https://rclone.org/install.sh | sudo bash

2. Create mount directory, i.e. for ascat:

   sudo mkdir -p /eumetsatdata/ascat && sudo chown -R $USER:$USER /eumetsatdata/ascat && chmod 755 /eumetsatdata/ascat

3. Put rclone like listed below config into a config file. For example, into /etc/eum_bucket_creds (keys without brackets) 

   sudo sh -c "cat >>/etc/eum_bucket_creds <<-EOF
   [eumetsat-ascat]
   type = s3
   provider = Ceph
   endpoint = https://s3.waw3-1.cloudferro.com
   EOF

4. Now you can already mount the data with command:

   sudo rclone --config /etc/eum_bucket_creds mount --allow-other --daemon eumetsat-ascat:ascat.metop-abc.level-1b.native /eumetsatdata/ascat

Setting up a service

To have mount points available all the time and after reboots, one need to set up the service and add mount points into fstab.

1. Link rclone

   sudo ln -s /usr/bin/rclone /sbin/mount.rclone

2. Create systemd service:, for example for ascat:

   sudo sh -c "cat >>/etc/systemd/system/eum-data-ascat.service" <<-EOF
   [Unit]
   Description=Mount EUMETSAT data bucket ascat
   After=network-online.target
   
   [Mount]
   Type=rclone
   What=eumetsat-ascat:ascat.metop-abc.level-1b.native
   Where=/eumetsatdata/ascat
   Options=ro,allow_other,args2env,vfs-cache-mode=writes,config=/etc/eum_bucket_creds,cache-dir=/var/rclone,vfs-cache-max-size=512Mi,vfs-cache-poll-interval=30m'
   EOF

3. Add corresponding line into /etc/fstab:

   echo "eumetsat-ascat:ascat.metop-abc.level-1b.native /eumetsatdata/ascat rclone ro,noauto,nofail,x-systemd.automount,args2env,allow_other,vfs_cache_mode=writes,config=/etc/eum_bucket_creds,cache_dir=/var/cache/rclone,vfs-cache-max-size=512Mi,vfs-cache-poll-interval=30m 0 0" | sudo tee -a /etc/fstab

4. Mount the folder:

   sudo mount /eumetsatdata/ascat

Limitations

1. Access to the archive is read-only.
2. Only a limited subset of EUMETSAT data is available. Please contact us if you need something that is not currently there.

Related articles

• Page:
  EUMETCast Terrestrial on AMT
• Page:
  Adding extra disk storage to your instances
• Page:
  EWC MARS access
• Page:
  Mounting EUMETSAT data buckets using FUSE
• Page:
  How to create S3 buckets in Morpheus