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| 1 | +use std::sync::Arc; |
| 2 | + |
| 3 | +use anyhow::Result; |
| 4 | +use azure_storage_blobs::prelude::{BlobServiceClient, ContainerClient}; |
| 5 | +use spin_core::async_trait; |
| 6 | +use spin_factor_blobstore::{Container, ContainerManager, Error}; |
| 7 | + |
| 8 | +pub mod auth; |
| 9 | +mod incoming_data; |
| 10 | +mod object_names; |
| 11 | + |
| 12 | +use auth::AzureBlobAuthOptions; |
| 13 | +use incoming_data::AzureIncomingData; |
| 14 | +use object_names::AzureObjectNames; |
| 15 | + |
| 16 | +pub struct AzureContainerManager { |
| 17 | + client: BlobServiceClient, |
| 18 | +} |
| 19 | + |
| 20 | +impl AzureContainerManager { |
| 21 | + pub fn new(auth_options: AzureBlobAuthOptions) -> Result<Self> { |
| 22 | + let (account, credentials) = match auth_options { |
| 23 | + AzureBlobAuthOptions::AccountKey(config) => ( |
| 24 | + config.account.clone(), |
| 25 | + azure_storage::StorageCredentials::access_key(&config.account, config.key.clone()), |
| 26 | + ), |
| 27 | + AzureBlobAuthOptions::Environmental => { |
| 28 | + let account = std::env::var("STORAGE_ACCOUNT").expect("missing STORAGE_ACCOUNT"); |
| 29 | + let access_key = |
| 30 | + std::env::var("STORAGE_ACCESS_KEY").expect("missing STORAGE_ACCOUNT_KEY"); |
| 31 | + ( |
| 32 | + account.clone(), |
| 33 | + azure_storage::StorageCredentials::access_key(account, access_key), |
| 34 | + ) |
| 35 | + } |
| 36 | + }; |
| 37 | + |
| 38 | + let client = azure_storage_blobs::prelude::ClientBuilder::new(account, credentials) |
| 39 | + .blob_service_client(); |
| 40 | + Ok(Self { client }) |
| 41 | + } |
| 42 | +} |
| 43 | + |
| 44 | +#[async_trait] |
| 45 | +impl ContainerManager for AzureContainerManager { |
| 46 | + async fn get(&self, name: &str) -> Result<Arc<dyn Container>, Error> { |
| 47 | + Ok(Arc::new(AzureContainer { |
| 48 | + _label: name.to_owned(), |
| 49 | + client: self.client.container_client(name), |
| 50 | + })) |
| 51 | + } |
| 52 | + |
| 53 | + fn is_defined(&self, _store_name: &str) -> bool { |
| 54 | + true |
| 55 | + } |
| 56 | +} |
| 57 | + |
| 58 | +struct AzureContainer { |
| 59 | + _label: String, |
| 60 | + client: ContainerClient, |
| 61 | +} |
| 62 | + |
| 63 | +/// Azure doesn't provide us with a container creation time |
| 64 | +const DUMMY_CREATED_AT: u64 = 0; |
| 65 | + |
| 66 | +#[async_trait] |
| 67 | +impl Container for AzureContainer { |
| 68 | + async fn exists(&self) -> anyhow::Result<bool> { |
| 69 | + Ok(self.client.exists().await?) |
| 70 | + } |
| 71 | + |
| 72 | + async fn name(&self) -> String { |
| 73 | + self.client.container_name().to_owned() |
| 74 | + } |
| 75 | + |
| 76 | + async fn info(&self) -> anyhow::Result<spin_factor_blobstore::ContainerMetadata> { |
| 77 | + let properties = self.client.get_properties().await?; |
| 78 | + Ok(spin_factor_blobstore::ContainerMetadata { |
| 79 | + name: properties.container.name, |
| 80 | + created_at: DUMMY_CREATED_AT, |
| 81 | + }) |
| 82 | + } |
| 83 | + |
| 84 | + async fn clear(&self) -> anyhow::Result<()> { |
| 85 | + anyhow::bail!("Azure blob storage does not support clearing containers") |
| 86 | + } |
| 87 | + |
| 88 | + async fn delete_object(&self, name: &str) -> anyhow::Result<()> { |
| 89 | + self.client.blob_client(name).delete().await?; |
| 90 | + Ok(()) |
| 91 | + } |
| 92 | + |
| 93 | + async fn delete_objects(&self, names: &[String]) -> anyhow::Result<()> { |
| 94 | + // TODO: are atomic semantics required? or efficiency guarantees? |
| 95 | + let futures = names.iter().map(|name| self.delete_object(name)); |
| 96 | + futures::future::try_join_all(futures).await?; |
| 97 | + Ok(()) |
| 98 | + } |
| 99 | + |
| 100 | + async fn has_object(&self, name: &str) -> anyhow::Result<bool> { |
| 101 | + Ok(self.client.blob_client(name).exists().await?) |
| 102 | + } |
| 103 | + |
| 104 | + async fn object_info( |
| 105 | + &self, |
| 106 | + name: &str, |
| 107 | + ) -> anyhow::Result<spin_factor_blobstore::ObjectMetadata> { |
| 108 | + let response = self.client.blob_client(name).get_properties().await?; |
| 109 | + Ok(spin_factor_blobstore::ObjectMetadata { |
| 110 | + name: name.to_string(), |
| 111 | + container: self.client.container_name().to_string(), |
| 112 | + created_at: response |
| 113 | + .blob |
| 114 | + .properties |
| 115 | + .creation_time |
| 116 | + .unix_timestamp() |
| 117 | + .try_into() |
| 118 | + .unwrap(), |
| 119 | + size: response.blob.properties.content_length, |
| 120 | + }) |
| 121 | + } |
| 122 | + |
| 123 | + async fn get_data( |
| 124 | + &self, |
| 125 | + name: &str, |
| 126 | + start: u64, |
| 127 | + end: u64, |
| 128 | + ) -> anyhow::Result<Box<dyn spin_factor_blobstore::IncomingData>> { |
| 129 | + // We can't use a Rust range because the Azure type does not accept inclusive ranges, |
| 130 | + // and we don't want to add 1 to `end` if it's already at MAX! |
| 131 | + let range = if end == u64::MAX { |
| 132 | + azure_core::request_options::Range::RangeFrom(start..) |
| 133 | + } else { |
| 134 | + azure_core::request_options::Range::Range(start..(end + 1)) |
| 135 | + }; |
| 136 | + let client = self.client.blob_client(name); |
| 137 | + Ok(Box::new(AzureIncomingData::new(client, range))) |
| 138 | + } |
| 139 | + |
| 140 | + async fn write_data( |
| 141 | + &self, |
| 142 | + name: &str, |
| 143 | + data: tokio::io::ReadHalf<tokio::io::SimplexStream>, |
| 144 | + finished_tx: tokio::sync::mpsc::Sender<anyhow::Result<()>>, |
| 145 | + ) -> anyhow::Result<()> { |
| 146 | + let client = self.client.blob_client(name); |
| 147 | + |
| 148 | + tokio::spawn(async move { |
| 149 | + let write_result = Self::write_data_core(data, client).await; |
| 150 | + finished_tx |
| 151 | + .send(write_result) |
| 152 | + .await |
| 153 | + .expect("should sent finish tx"); |
| 154 | + }); |
| 155 | + |
| 156 | + Ok(()) |
| 157 | + } |
| 158 | + |
| 159 | + async fn list_objects(&self) -> anyhow::Result<Box<dyn spin_factor_blobstore::ObjectNames>> { |
| 160 | + let stm = self.client.list_blobs().into_stream(); |
| 161 | + Ok(Box::new(AzureObjectNames::new(stm))) |
| 162 | + } |
| 163 | +} |
| 164 | + |
| 165 | +impl AzureContainer { |
| 166 | + async fn write_data_core( |
| 167 | + mut data: tokio::io::ReadHalf<tokio::io::SimplexStream>, |
| 168 | + client: azure_storage_blobs::prelude::BlobClient, |
| 169 | + ) -> anyhow::Result<()> { |
| 170 | + use tokio::io::AsyncReadExt; |
| 171 | + |
| 172 | + // Azure limits us to 50k blocks per blob. At 2MB/block that allows 100GB, which will be |
| 173 | + // enough for most use cases. If users need flexibility for larger blobs, we could make |
| 174 | + // the block size configurable via the runtime config ("size hint" or something). |
| 175 | + const BLOCK_SIZE: usize = 2 * 1024 * 1024; |
| 176 | + |
| 177 | + let mut blocks = vec![]; |
| 178 | + |
| 179 | + 'put_blocks: loop { |
| 180 | + let mut bytes = Vec::with_capacity(BLOCK_SIZE); |
| 181 | + loop { |
| 182 | + let read = data.read_buf(&mut bytes).await?; |
| 183 | + let len = bytes.len(); |
| 184 | + |
| 185 | + if read == 0 { |
| 186 | + // end of stream - send the last block and go |
| 187 | + let id_bytes = uuid::Uuid::new_v4().as_bytes().to_vec(); |
| 188 | + let block_id = azure_storage_blobs::prelude::BlockId::new(id_bytes); |
| 189 | + client.put_block(block_id.clone(), bytes).await?; |
| 190 | + blocks.push(azure_storage_blobs::blob::BlobBlockType::Uncommitted( |
| 191 | + block_id, |
| 192 | + )); |
| 193 | + break 'put_blocks; |
| 194 | + } |
| 195 | + if len >= BLOCK_SIZE { |
| 196 | + let id_bytes = uuid::Uuid::new_v4().as_bytes().to_vec(); |
| 197 | + let block_id = azure_storage_blobs::prelude::BlockId::new(id_bytes); |
| 198 | + client.put_block(block_id.clone(), bytes).await?; |
| 199 | + blocks.push(azure_storage_blobs::blob::BlobBlockType::Uncommitted( |
| 200 | + block_id, |
| 201 | + )); |
| 202 | + break; |
| 203 | + } |
| 204 | + } |
| 205 | + } |
| 206 | + |
| 207 | + let block_list = azure_storage_blobs::blob::BlockList { blocks }; |
| 208 | + client.put_block_list(block_list).await?; |
| 209 | + |
| 210 | + Ok(()) |
| 211 | + } |
| 212 | +} |
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