feat(buckets): add CRYOSTAT_BUCKETS for pre-created buckets

cryostat-entrypoint.bash

@@ -15,6 +15,26 @@ set -xe
 cfg="$(mktemp)"
 envsubst '$CRYOSTAT_ACCESS_KEY $CRYOSTAT_SECRET_KEY' < /etc/seaweed_conf.template.json > "${cfg}"
 
+function createBuckets() {
+    for i in $(echo "$CRYOSTAT_BUCKETS" | tr ',' '\n'); do
+        local len
+        len="${#i}"
+        if [ "${len}" -lt 3 ]; then
+            echo "Bucket names must be at least 3 characters"
+            exit 1
+        fi
+        if [ "${len}" -gt 63 ]; then
+            echo "Bucket names must be at most 63 characters"
+            exit 1
+        fi
+        local cmd
+        # FIXME do something better than sleeping here
+        cmd="sleep ${BUCKET_CREATION_STARTUP_SECONDS:-30} ; echo \"s3.bucket.create -name ${i}\" | weed shell"
+        bash -c "${cmd}" &
+    done
+}
+createBuckets
+
 exec /usr/bin/entrypoint.sh \
     server -dir="${DATA_DIR:-/tmp}" \
     -s3 -s3.config="${cfg}" \