dgregoire commented on issue #7522: Peon cannot write segments to GCS but can write index logs URL: https://github.com/apache/druid/issues/7522#issuecomment-599512943 > hello. I have same case. What you solved problem? Using the version of the gcs hdfs connector that was recommended at that time (almost a year ago) did not work and I had switched to using the latest. There's been developments more recently and there is a GCS extension now, perhaps things have changed? I'm not working on this project anymore, but I have theses excerpts to share. I was using this from a `dockerfile` to add the gcs connector. ```dockerfile # GCS connector ADD https://storage.googleapis.com/hadoop-lib/gcs/gcs-connector-hadoop2-latest.jar /opt/druid/extensions/druid-hdfs-storage ``` `core-site.xml` placed in `_common`, I had a startup script replacing the KV of the keys `GCS_PROJECT_ID` and `GCS_KEY_FILE`. ```xml <configuration> <property> <name>fs.gs.impl</name> <value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem</value> <description>The FileSystem for gs: (GCS) uris.</description> </property> <property> <name>fs.AbstractFileSystem.gs.impl</name> <value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFS</value> <description> The AbstractFileSystem for gs: (GCS) uris. Only necessary for use with Hadoop 2. </description> </property> <property> <name>fs.gs.project.id</name> <value>GCS_PROJECT_ID</value> <description> Required. Google Cloud Project ID with access to configured GCS buckets. </description> </property> <property> <name>google.cloud.auth.service.account.enable</name> <value>true</value> <description> Whether to use a service account for GCS authorizaiton. If an email and keyfile are provided (see google.cloud.auth.service.account.email and google.cloud.auth.service.account.keyfile), then that service account willl be used. Otherwise the connector will look to see if it running on a GCE VM with some level of GCS access in it's service account scope, and use that service account. </description> </property> <property> <name>google.cloud.auth.service.account.json.keyfile</name> <value>GCS_KEY_FILE</value> <description> The JSON key file of the service account used for GCS access when google.cloud.auth.service.account.enable is true. </description> </property> <property> <name>hadoop.tmp.dir</name> <value>/var/druid</value> </property> </configuration> ``` and `common.runtime.properties` including the hdfs storage extension. ```properties # This is not the full list of Druid extensions, but common ones that people often use. You may need to change this list # based on your particular setup. druid.extensions.directory=/opt/druid/extensions druid.extensions.loadList=["druid-histogram", "druid-datasketches", "mysql-metadata-storage", "druid-hdfs-storage", "druid-kafka-indexing-service", "druid-protobuf-extensions"] ```
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