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frostfs-s3-gw/docs/configuration.md
Denis Kirillov 5d6d5e41d0 [#398] Support retryer 
Add two strategy for PutBucketSettings request retryer:
* exponential backoff (increasing up to `max_backoff` delays with jitter)
* constant backoff (always the same `max_backoff` delay between requests)

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

(cherry picked from commit bb81afc14a)
Signed-off-by: Alex Vanin <a.vanin@yadro.com>
2024-06-19 08:55:45 +03:00

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# Configuration
There are three ways to configure the S3 GW:
1. CLI parameters
2. YAML file
3. Environment variables
Everything available as a CLI parameter can also be specified via environment variables and almost everything can be
specified via `.yaml` configuration file.
But **not vice versa**, some parameters can be configured only with environment variables/configuration file.
Most of these parameters have default values, therefore, these ways to configure the gateway are optional and
basic configuration can be completed with CLI parameters only.
1. [CLI parameters](#cli-parameters)
1. [Nodes and weights](#nodes-and-weights)
2. [Wallet](#wallet)
3. [Binding and TLS](#listening-on-address-and-TLS)
4. [RPC endpoint and resolving of bucket names](#rpc-endpoint-and-resolving-of-bucket-names)
5. [Processing of requests](#processing-of-requests)
6. [Connection to FrostFS](#connection-to-FrostFS)
7. [Monitoring and metrics](#monitoring-and-metrics)
2. [YAML file and environment variables](#yaml-file-and-environment-variables)
1. [Configuration file](#frostfs-s3-gateway-configuration-file)
## CLI parameters
### Nodes and weights
You can specify multiple `-p` options to add more FrostFS nodes; this will make
a gateway spread requests equally among them (using weight 1 for every node):
```shell
$ frostfs-s3-gw -p 192.168.130.72:8080 -p 192.168.130.71:8080
```
If you want some specific load distribution proportions, use weights and priorities, they
can only be specified via environment variables or a configuration file.
### Wallet
Wallet (`--wallet`) is a mandatory parameter. It is a path to a wallet file. You can provide a passphrase to decrypt
a wallet via env variable or conf file, or you will be asked to enter a password interactively.
You can also specify an account address to use from a wallet using the `--address` parameter.
### Listening on address and TLS
You can make the gateway listen on specific address using the `--listen_address` option.
It can also provide TLS interface for its users, just specify paths to the key and
certificate files via `--tls.key_file` and `--tls.cert_file` parameters. Note
that using these options makes gateway TLS-only. If you need to serve both TLS
and plain text, you either have to run two gateway instances or use some
external redirecting solution.
Example to bind to `192.168.130.130:443` and serve TLS there (keys and nodes are
omitted):
```shell
$ frostfs-s3-gw --listen_address 192.168.130.130:443 \
--tls.key_file=key.pem --tls.cert_file=cert.pem
```
Using these flag you can configure only one address. To set multiple addresses use yaml config.
### RPC endpoint and resolving of bucket names
To set RPC endpoint specify a value of parameter `-r` or `--rpc_endpoint`. The parameter is **required if** another
parameter's `--resolve_order` value contains `nns`.
```shell
$ frostfs-s3-gw --rpc_endpoint http://morph-chain.frostfs.devenv:30333/ --resolve_order nns,dns
```
### Processing of requests
Maximum number of clients whose requests can be handled by the gateway can be specified by the value of
`--max_clients_count` parameter.
`--max_clients_deadline` defines deadline after which the gate sends error `RequestTimeout` to a client.
```shell
$ frostfs-s3-gw --max_clients_count 150 --max_clients_deadline 1m
```
### Connection to FrostFS
Timeout to connect to FrostFS nodes can be set with `--connect_timeout`
and timeout to check node health during rebalance`--healthcheck_timeout`.
Also, interval to check node health can be specified by `--rebalance_interval` value.
```shell
$ frostfs-s3-gw --healthcheck_timeout 15s --connect_timeout 1m --rebalance_interval 1h
```
### Monitoring and metrics
Pprof and Prometheus are integrated into the gateway. To enable them, use `--pprof` and `--metrics` flags or
`S3_GW_PPROF_ENABLED`/`S3_GW_PROMETHEUS_ENABLED` environment variables.
## YAML file and environment variables
Example of a YAML configuration file: [yaml-example](/config/config.yaml)
Examples of environment variables: [env-example](/config/config.env).
A path to a configuration file can be specified with `--config` parameter:
```shell
$ frostfs-s3-gw --config your-config.yaml
```
### Multiple configs
You can use several config files when running application. It allows you to split configuration into parts.
For example, you can use separate yaml file for pprof and prometheus section in config (see [config examples](../config)).
You can either provide several files with repeating `--config` flag or provide path to the dir that contains all configs using `--config-dir` flag.
Also, you can combine these flags:
```shell
$ frostfs-s3-gw --config ./config/config.yaml --config /your/partial/config.yaml --config-dir ./config/dir
```
**Note:** next file in `--config` flag overwrites values from the previous one.
Files from `--config-dir` directory overwrite values from `--config` files.
So the command above run `frostfs-s3-gw` to listen on `0.0.0.0:8080` address (value from `./config/config.yaml`),
applies parameters from `/your/partial/config.yaml`,
enable pprof (value from `./config/dir/pprof.yaml`) and prometheus (value from `./config/dir/prometheus.yaml`).
### Reload on SIGHUP
Some config values can be reloaded on SIGHUP signal.
Such parameters have special mark in tables below.
You can send SIGHUP signal to app using the following command:
```shell
$ kill -s SIGHUP <app_pid>
```
Example:
```shell
$ ./bin/frostfs-s3-gw --config config.yaml &> s3.log &
[1] 998346
$ cat s3.log
# ...
2022-09-30T17:38:22.338+0300 info s3-gw/app.go:371 application started {"name": "frostfs-s3-gw", "version": "v0.24.0"}
# ...
$ kill -s SIGHUP 998346
$ cat s3.log
# ...
2022-09-30T17:38:40.909+0300 info s3-gw/app.go:491 SIGHUP config reload completed
```
### FrostFS S3 Gateway configuration file
This section contains detailed FrostFS S3 Gateway configuration file description
including default config values and some tips to set up configurable values.
There are some custom types used for brevity:
* `duration` -- string consisting of a number and a suffix. Suffix examples include `s` (seconds), `m` (minutes), `ms` (
milliseconds).
### Structure
| Section | Description |
|--------------------|----------------------------------------------------------------|
| no section | [General parameters](#general-section) |
| `wallet` | [Wallet configuration](#wallet-section) |
| `peers` | [Nodes configuration](#peers-section) |
| `placement_policy` | [Placement policy configuration](#placement_policy-section) |
| `server` | [Server configuration](#server-section) |
| `control` | [Control API configuration](#control-section) |
| `logger` | [Logger configuration](#logger-section) |
| `cache` | [Cache configuration](#cache-section) |
| `nats` | [NATS configuration](#nats-section) |
| `cors` | [CORS configuration](#cors-section) |
| `pprof` | [Pprof configuration](#pprof-section) |
| `prometheus` | [Prometheus configuration](#prometheus-section) |
| `tracing` | [Tracing configuration](#tracing-section) |
| `frostfs` | [Parameters of requests to FrostFS](#frostfs-section) |
| `resolve_bucket` | [Bucket name resolving configuration](#resolve_bucket-section) |
| `kludge` | [Different kludge configuration](#kludge-section) |
| `runtime` | [Runtime configuration](#runtime-section) |
| `features` | [Features configuration](#features-section) |
| `web` | [Web server configuration](#web-section) |
| `frostfsid` | [FrostfsID configuration](#frostfsid-section) |
| `policy` | [Policy contract configuration](#policy-section) |
| `proxy` | [Proxy contract configuration](#proxy-section) |
| `namespaces` | [Namespaces configuration](#namespaces-section) |
| `retry` | [Retry configuration](#retry-section) |
### General section
```yaml
listen_domains:
- s3dev.frostfs.devenv
- s3dev2.frostfs.devenv
rpc_endpoint: http://morph-chain.frostfs.devenv:30333
resolve_order:
- nns
- dns
connect_timeout: 10s
stream_timeout: 10s
healthcheck_timeout: 15s
rebalance_interval: 60s
pool_error_threshold: 100
max_clients_count: 100
max_clients_deadline: 30s
allowed_access_key_id_prefixes:
- Ck9BHsgKcnwfCTUSFm6pxhoNS4cBqgN2NQ8zVgPjqZDX
- 3stjWenX15YwYzczMr88gy3CQr4NYFBQ8P7keGzH5QFn
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|----------------------------------|------------|---------------|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `listen_domains` | `[]string` | no | | Domains to be able to use virtual-hosted-style access to bucket. |
| `rpc_endpoint` | `string` | no | | The address of the RPC host to which the gateway connects to resolve bucket names and interact with frostfs contracts (required to use the `nns` resolver and `frostfsid` contract). |
| `resolve_order` | `[]string` | yes | `[dns]` | Order of bucket name resolvers to use. Available resolvers: `dns`, `nns`. |
| `connect_timeout` | `duration` | no | `10s` | Timeout to connect to a node. |
| `stream_timeout` | `duration` | no | `10s` | Timeout for individual operations in streaming RPC. |
| `healthcheck_timeout` | `duration` | no | `15s` | Timeout to check node health during rebalance. |
| `rebalance_interval` | `duration` | no | `60s` | Interval to check node health. |
| `pool_error_threshold` | `uint32` | no | `100` | The number of errors on connection after which node is considered as unhealthy. |
| `max_clients_count` | `int` | no | `100` | Limits for processing of clients' requests. |
| `max_clients_deadline` | `duration` | no | `30s` | Deadline after which the gate sends error `RequestTimeout` to a client. |
| `allowed_access_key_id_prefixes` | `[]string` | no | | List of allowed `AccessKeyID` prefixes which S3 GW serve. If the parameter is omitted, all `AccessKeyID` will be accepted. |
### `wallet` section
```yaml
wallet:
path: /path/to/wallet.json # Path to wallet
passphrase: "" # Passphrase to decrypt wallet.
address: NfgHwwTi3wHAS8aFAN243C5vGbkYDpqLHP
```
| Parameter | Type | Default value | Description |
|--------------|----------|---------------|---------------------------------------------------------------------------|
| `path` | `string` | | Path to wallet |
| `passphrase` | `string` | | Passphrase to decrypt wallet. |
| `address` | `string` | | Account address to get from wallet. If omitted default one will be used. |
### `peers` section
```yaml
# Nodes configuration
# This configuration makes the gateway use the first node (node1.frostfs:8080)
# while it's healthy. Otherwise, gateway uses the second node (node2.frostfs:8080)
# for 10% of requests and the third node (node3.frostfs:8080) for 90% of requests.
# Until nodes with the same priority level are healthy
# nodes with other priority are not used.
# The lower the value, the higher the priority.
peers:
0:
address: node1.frostfs:8080
priority: 1
weight: 1
1:
address: node2.frostfs:8080
priority: 2
weight: 0.1
2:
address: node3.frostfs:8080
priority: 2
weight: 0.9
```
| Parameter | Type | Default value | Description |
|------------|----------|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|
| `address` | `string` | | Address of storage node. |
| `priority` | `int` | `1` | It allows to group nodes and don't switch group until all nodes with the same priority will be unhealthy. The lower the value, the higher the priority. |
| `weight` | `float` | `1` | Weight of node in the group with the same priority. Distribute requests to nodes proportionally to these values. |
### `placement_policy` section
```yaml
placement_policy:
default: REP 3
region_mapping: /path/to/mapping/rules.json
copies_numbers:
- location_constraint: one-dc
vector:
- 1
- 2
- 3
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|------------------|------------------------------------------------|---------------|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `default` | `string` | yes | `REP 3` | Default policy of placing containers in FrostFS. If a user sends a request `CreateBucket` and doesn't define policy for placing of a container in FrostFS, the S3 Gateway will put the container with default policy. |
| `region_mapping` | `string` | yes | | Path to file that maps aws `LocationContraint` values to FrostFS placement policy. The similar to `--container-policy` flag in `frostfs-s3-authmate` util, see in [docs](./authmate.md#containers-policy) |
| `copies_numbers` | [[]Copies numbers](#copies_numbers-subsection) | no | | Array of configured location constraints and their copies numbers. |
File for `region_mapping` must contain something like this:
```json
{
"rep-3": "REP 3",
"complex": "REP 1 IN X CBF 1 SELECT 1 FROM * AS X",
"example-json-policy": "{\"replicas\":[{\"count\":3,\"selector\":\"SelASD0\"}],\"container_backup_factor\":3,\"selectors\":[{\"name\":\"SelASD0\",\"count\":3,\"filter\":\"*\"}],\"filters\":[]}"
}
```
**Note:** on SIGHUP reload policies will be updated only if both parameters are valid.
So if you change `default` to some valid value and set invalid path in `region_mapping` the `default` value won't be changed.
#### `copies_numbers` subsection
```yaml
- location_constraint: sample-01
vector:
- 1
- 2
- 3
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------------------|----------|---------------|---------------|----------------------------------------------------------|
| `location_constraint` | `string` | no | | Location constraint text label. |
| `vector` | `[]int` | no | | Array of copies numbers corresponding to the constraint. |
### `server` section
You can specify several listeners for server. For example, for `http` and `https`.
```yaml
server:
- address: 0.0.0.0:8080
tls:
enabled: false
cert_file: /path/to/cert
key_file: /path/to/key
- address: 0.0.0.0:8081
tls:
enabled: true
cert_file: /path/to/another/cert
key_file: /path/to/another/key
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------------|----------|---------------|----------------|-----------------------------------------------|
| `address` | `string` | | `0.0.0.0:8080` | The address that the gateway is listening on. |
| `tls.enabled` | `bool` | | false | Enable TLS or not. |
| `tls.cert_file` | `string` | yes | | Path to the TLS certificate. |
| `tls.key_file` | `string` | yes | | Path to the key. |
### `control` section
Control API parameters.
```yaml
control:
authorized_keys:
- 035839e45d472a3b7769a2a1bd7d54c4ccd4943c3b40f547870e83a8fcbfb3ce11
- 028f42cfcb74499d7b15b35d9bff260a1c8d27de4f446a627406a382d8961486d6
grpc:
endpoint: localhost:8083
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-------------------|------------|---------------|------------------|------------------------------------------------------------------------------|
| `authorized_keys` | `[]string` | yes | | List of hex-encoded public keys that have rights to use the Control Service. |
| `grpc.endpoint` | `string` | | `localhost:8083` | Endpoint that is listened by the Control Service. |
### `logger` section
```yaml
logger:
level: debug
destination: stdout
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|---------------|----------|---------------|---------------|----------------------------------------------------------------------------------------------------|
| `level` | `string` | yes | `debug` | Logging level.<br/>Possible values: `debug`, `info`, `warn`, `error`, `dpanic`, `panic`, `fatal`. |
| `destination` | `string` | no | `stdout` | Destination for logger: `stdout` or `journald` |
### `cache` section
```yaml
cache:
objects:
lifetime: 300s
size: 150
list:
lifetime: 1m
size: 100
list_session:
lifetime: 1m
size: 100
names:
lifetime: 1m
size: 1000
buckets:
lifetime: 1m
size: 500
system:
lifetime: 2m
size: 1000
accessbox:
removing_check_interval: 5m
lifetime: 10m
size: 100
accesscontrol:
lifetime: 1m
size: 100000
morph_policy:
lifetime: 30s
size: 10000
frostfsid:
lifetime: 1m
size: 10000
```
| Parameter | Type | Default value | Description |
|-----------------|-------------------------------------------------|-----------------------------------|----------------------------------------------------------------------------------------|
| `objects` | [Cache config](#cache-subsection) | `lifetime: 5m`<br>`size: 1000000` | Cache for objects (FrostFS headers). |
| `list` | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 100000` | Cache which keeps lists of objects in buckets. |
| `list_session` | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 100` | Cache which keeps listing session. |
| `names` | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 10000` | Cache which contains mapping of nice name to object addresses. |
| `buckets` | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 1000` | Cache which contains mapping of bucket name to bucket info. |
| `system` | [Cache config](#cache-subsection) | `lifetime: 5m`<br>`size: 10000` | Cache for system objects in a bucket: bucket settings, notification configuration etc. |
| `accessbox` | [Accessbox cache config](#accessbox-subsection) | `lifetime: 10m`<br>`size: 100` | Cache which stores access box with tokens by its address. |
| `accesscontrol` | [Cache config](#cache-subsection) | `lifetime: 1m`<br>`size: 100000` | Cache which stores owner to cache operation mapping. |
| `morph_policy` | [Cache config](#cache-subsection) | `lifetime: 1m`<br>`size: 10000` | Cache which stores list of policy chains. |
| `frostfsid` | [Cache config](#cache-subsection) | `lifetime: 1m`<br>`size: 10000` | Cache which stores FrostfsID subject info. |
#### `cache` subsection
```yaml
lifetime: 2m
size: 1000
```
| Parameter | Type | Default value | Description |
|------------|------------|------------------|-------------------------------|
| `lifetime` | `duration` | depends on cache | Lifetime of entries in cache. |
| `size` | `int` | depends on cache | LRU cache size. |
#### `accessbox` subsection
```yaml
lifetime: 10m
size: 100
```
| Parameter | Type | Default value | Description |
|---------------------------|------------|---------------|-------------------------------------------------------|
| `removing_check_interval` | `duration` | `5m' | Time after which creds should be checked for removal. |
| `lifetime` | `duration` | '10m' | Lifetime of entries in cache. |
| `size` | `int` | '100 | LRU cache size. |
### `nats` section
This is an advanced section, use with caution.
You can turn on notifications about successful completions of basic operations, and the gateway will send notifications
via NATS JetStream.
1. to configure the NATS server with JetStream
2. to specify NATS parameters for the S3 GW. It's ***necessary*** to define a values of `nats.enable` or
`S3_GW_NATS_ENABLED` as `True`
3. to configure notifications in a bucket
```yaml
nats:
enabled: true
endpoint: nats://localhost:4222
timeout: 30s
cert_file: /path/to/cert
key_file: /path/to/key
root_ca: /path/to/ca
```
| Parameter | Type | Default value | Description |
|---------------|------------|---------------|------------------------------------------------------|
| `enabled` | `bool` | `false` | Flag to enable the service. |
| `endpoint` | `string` | | NATS endpoint to connect to. |
| `timeout` | `duration` | `30s` | Timeout for the object notification operation. |
| `certificate` | `string` | | Path to the client certificate. |
| `key` | `string` | | Path to the client key. |
| `ca` | `string` | | Override root CA used to verify server certificates. |
### `cors` section
```yaml
cors:
default_max_age: 600
```
| Parameter | Type | Default value | Description |
|-------------------|-------|---------------|------------------------------------------------------|
| `default_max_age` | `int` | `600` | Value of `Access-Control-Max-Age` header in seconds. |
# `pprof` section
Contains configuration for the `pprof` profiler.
```yaml
pprof:
enabled: true
address: localhost:8085
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------|----------|---------------|------------------|-----------------------------------------|
| `enabled` | `bool` | yes | `false` | Flag to enable the service. |
| `address` | `string` | yes | `localhost:8085` | Address that service listener binds to. |
# `prometheus` section
Contains configuration for the `prometheus` metrics service.
General metrics are available on `/metrics` url path, billing metrics on `/metrics/billing`.
```yaml
prometheus:
enabled: true
address: localhost:8086
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------|----------|---------------|------------------|-----------------------------------------|
| `enabled` | `bool` | yes | `false` | Flag to enable the service. |
| `address` | `string` | yes | `localhost:8086` | Address that service listener binds to. |
# `tracing` section
Contains configuration for the `tracing` service.
```yaml
tracing:
enabled: false
exporter: "otlp_grpc"
endpoint: "localhost:4318"
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-------------|----------|---------------|---------------|-----------------------------------------|
| `enabled` | `bool` | yes | `false` | Flag to enable the service. |
| `exporter` | `string` | yes | `` | Type of tracing exporter. |
| `endpoint` | `string` | yes | `` | Address that service listener binds to. |
# `frostfs` section
Contains parameters of requests to FrostFS.
The `set_copies_number` value can be overridden with `X-Amz-Meta-Frostfs-Copies-Number` (value is comma separated numbers: `1,2,3`)
header for `PutObject`, `CopyObject`, `CreateMultipartUpload`.
```yaml
frostfs:
set_copies_number: [0]
client_cut: false
buffer_max_size_for_put: 1048576 # 1mb
tree_pool_max_attempts: 0
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|---------------------------|------------|---------------|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `set_copies_number` | `[]uint32` | yes | `[0]` | Numbers of the object copies (for each replica) to consider PUT to FrostFS successful. <br/>Default value `[0]` or empty list means that object will be processed according to the container's placement policy |
| `client_cut` | `bool` | yes | `false` | This flag enables client side object preparing. |
| `buffer_max_size_for_put` | `uint64` | yes | `1048576` | Sets max buffer size for read payload in put operations. |
| `tree_pool_max_attempts` | `uint32` | no | `0` | Sets max attempt to make successful tree request. Value 0 means the number of attempts equals to number of nodes in pool. |
# `resolve_bucket` section
Bucket name resolving parameters from and to container ID.
```yaml
resolve_bucket:
namespace_header: X-Frostfs-Namespace
allow:
- container
deny:
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|--------------------|------------|---------------|-----------------------|--------------------------------------------------------------------------------------------------------------------------|
| `namespace_header` | `string` | yes | `X-Frostfs-Namespace` | Header to determine zone to resolve bucket name. |
| `allow` | `[]string` | no | | List of container zones which are available to resolve. Mutual exclusive with `deny` list. Prioritized over `deny` list. |
| `deny` | `[]string` | no | | List of container zones which are restricted to resolve. Mutual exclusive with `allow` list. |
# `kludge` section
Workarounds for non-standard use cases.
```yaml
kludge:
use_default_xmlns: false
bypass_content_encoding_check_in_chunks: false
default_namespaces: [ "", "root" ]
acl_enabled: false
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-------------------------------------------|------------|---------------|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `use_default_xmlns` | `bool` | yes | `false` | Enable using default xml namespace `http://s3.amazonaws.com/doc/2006-03-01/` when parse xml bodies. |
| `bypass_content_encoding_check_in_chunks` | `bool` | yes | `false` | Use this flag to be able to use [chunked upload approach](https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html) without having `aws-chunked` value in `Content-Encoding` header. |
| `default_namespaces` | `[]string` | yes | `["","root"]` | Namespaces that should be handled as default. |
| `acl_enabled` | `bool` | yes | `false` | Enable bucket/object ACL support for newly created buckets. |
# `runtime` section
Contains runtime parameters.
```yaml
runtime:
soft_memory_limit: 1gb
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|---------------------|--------|---------------|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `soft_memory_limit` | `size` | yes | maxint64 | Soft memory limit for the runtime. Zero or no value stands for no limit. If `GOMEMLIMIT` environment variable is set, the value from the configuration file will be ignored. |
# `features` section
Contains parameters for enabling features.
```yaml
features:
policy:
deny_by_default: false
md5:
enabled: false
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|--------------------------|--------|---------------|---------------|------------------------------------------------------------------------------|
| `md5.enabled` | `bool` | yes | false | Flag to enable return MD5 checksum in ETag headers and fields. |
| `policy.deny_by_default` | `bool` | yes | false | Enable denying access for request that doesn't match any policy chain rules. |
# `web` section
Contains web server configuration parameters.
```yaml
web:
read_timeout: 0
read_header_timeout: 30s
write_timeout: 0
idle_timeout: 30s
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------------------|------------|---------------|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `read_timeout` | `duration` | no | `0` | The maximum duration for reading the entire request, including the body. A zero or negative value means there will be no timeout. |
| `read_header_timeout` | `duration` | no | `30s` | The amount of time allowed to read request headers. If `read_header_timeout` is zero, the value of `read_timeout` is used. If both are zero, there is no timeout. |
| `write_timeout` | `duration` | no | `0` | The maximum duration before timing out writes of the response. A zero or negative value means there will be no timeout. |
| `idle_timeout` | `duration` | no | `30s` | The maximum amount of time to wait for the next request when keep-alives are enabled. If `idle_timeout` is zero, the value of `read_timeout` is used. If both are zero, there is no timeout. |
# `frostfsid` section
FrostfsID contract configuration. To enable this functionality the `rpc_endpoint` param must be also set.
```yaml
frostfsid:
contract: frostfsid.frostfs
validation:
enabled: false
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|----------------------|----------|---------------|---------------------|---------------------------------------------------------------------------------------|
| `contract` | `string` | no | `frostfsid.frostfs` | FrostfsID contract hash (LE) or name in NNS. |
| `validation.enabled` | `bool` | no | `false` | Enables a check to only allow requests to users registered in the FrostfsID contract. |
# `policy` section
Policy contract configuration. To enable this functionality the `rpc_endpoint` param must be also set.
```yaml
policy:
contract: policy.frostfs
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|------------|----------|---------------|----------------|-------------------------------------------|
| `contract` | `string` | no | policy.frostfs | Policy contract hash (LE) or name in NNS. |
# `proxy` section
Proxy contract configuration. To enable this functionality the `rpc_endpoint` param must be also set.
```yaml
proxy:
contract: proxy.frostfs
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|------------|----------|---------------|-----------------|------------------------------------------|
| `contract` | `string` | no | `proxy.frostfs` | Proxy contract hash (LE) or name in NNS. |
# `namespaces` section
Namespaces configuration.
```yaml
namespaces:
config: namespace.json
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|-----------|----------|---------------|---------------|-----------------------------------------------------|
| `config` | `string` | yes | | Path to json file with config value for namespaces. |
## `namespaces.config` subsection
Example of `namespaces.json`.
Note that config values from `namespaces.json` can override config values for default namespaces
(value for which are fetched from regular config value e.g. [placement-policy](#placement_policy-section)).
To override config values for default namespaces use namespace names that are provided in `kludge.default_namespaces`.
```json
{
"namespaces": {
"namespace1": {
"location_constraints": {
"default": "REP 3",
"test": "{\"replicas\":[{\"count\":1,\"selector\":\"\"}],\"containerBackupFactor\":0,\"selectors\":[],\"filters\":[],\"unique\":false}"
},
"copies_numbers": {
"default": [ 0 ],
"test": [ 1 ]
}
}
}
}
```
# `retry` section
Retry strategy configuration.
```yaml
retry:
max_attempts: 4
max_backoff: 30s
strategy: exponential
```
| Parameter | Type | SIGHUP reload | Default value | Description |
|---------------|------------|---------------|---------------|--------------------------------------------------------------------------------------|
| `max_attemps` | `int` | yes | `4` | Max amount of request attempts. Currently only for updating bucket settings request. |
| `max_backoff` | `duration` | yes | `30s` | Max delay before next attempt. |
| `strategy` | `string` | yes | `exponential` | Backoff strategy. `exponential` and `constant` are allowed. |
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