fixes#3868
docker image - `hasura/graphql-engine:inherited-roles-preview-48b73a2de`
Note:
To be able to use the inherited roles feature, the graphql-engine should be started with the env variable `HASURA_GRAPHQL_EXPERIMENTAL_FEATURES` set to `inherited_roles`.
Introduction
------------
This PR implements the idea of multiple roles as presented in this [paper](https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/FGALanguageICDE07.pdf). The multiple roles feature in this PR can be used via inherited roles. An inherited role is a role which can be created by combining multiple singular roles. For example, if there are two roles `author` and `editor` configured in the graphql-engine, then we can create a inherited role with the name of `combined_author_editor` role which will combine the select permissions of the `author` and `editor` roles and then make GraphQL queries using the `combined_author_editor`.
How are select permissions of different roles are combined?
------------------------------------------------------------
A select permission includes 5 things:
1. Columns accessible to the role
2. Row selection filter
3. Limit
4. Allow aggregation
5. Scalar computed fields accessible to the role
Suppose there are two roles, `role1` gives access to the `address` column with row filter `P1` and `role2` gives access to both the `address` and the `phone` column with row filter `P2` and we create a new role `combined_roles` which combines `role1` and `role2`.
Let's say the following GraphQL query is queried with the `combined_roles` role.
```graphql
query {
employees {
address
phone
}
}
```
This will translate to the following SQL query:
```sql
select
(case when (P1 or P2) then address else null end) as address,
(case when P2 then phone else null end) as phone
from employee
where (P1 or P2)
```
The other parameters of the select permission will be combined in the following manner:
1. Limit - Minimum of the limits will be the limit of the inherited role
2. Allow aggregations - If any of the role allows aggregation, then the inherited role will allow aggregation
3. Scalar computed fields - same as table column fields, as in the above example
APIs for inherited roles:
----------------------
1. `add_inherited_role`
`add_inherited_role` is the [metadata API](https://hasura.io/docs/1.0/graphql/core/api-reference/index.html#schema-metadata-api) to create a new inherited role. It accepts two arguments
`role_name`: the name of the inherited role to be added (String)
`role_set`: list of roles that need to be combined (Array of Strings)
Example:
```json
{
"type": "add_inherited_role",
"args": {
"role_name":"combined_user",
"role_set":[
"user",
"user1"
]
}
}
```
After adding the inherited role, the inherited role can be used like single roles like earlier
Note:
An inherited role can only be created with non-inherited/singular roles.
2. `drop_inherited_role`
The `drop_inherited_role` API accepts the name of the inherited role and drops it from the metadata. It accepts a single argument:
`role_name`: name of the inherited role to be dropped
Example:
```json
{
"type": "drop_inherited_role",
"args": {
"role_name":"combined_user"
}
}
```
Metadata
---------
The derived roles metadata will be included under the `experimental_features` key while exporting the metadata.
```json
{
"experimental_features": {
"derived_roles": [
{
"role_name": "manager_is_employee_too",
"role_set": [
"employee",
"manager"
]
}
]
}
}
```
Scope
------
Only postgres queries and subscriptions are supported in this PR.
Important points:
-----------------
1. All columns exposed to an inherited role will be marked as `nullable`, this is done so that cell value nullification can be done.
TODOs
-------
- [ ] Tests
- [ ] Test a GraphQL query running with a inherited role without enabling inherited roles in experimental features
- [] Tests for aggregate queries, limit, computed fields, functions, subscriptions (?)
- [ ] Introspection test with a inherited role (nullability changes in a inherited role)
- [ ] Docs
- [ ] Changelog
Co-authored-by: Vamshi Surabhi <6562944+0x777@users.noreply.github.com>
GitOrigin-RevId: 3b8ee1e11f5ceca80fe294f8c074d42fbccfec63
Added a note on existentials. I plan to create a subsequent PR with a note on how we use the singletons trick to recover the type inside an existential.
GitOrigin-RevId: 1f227d859dcc384b4ac7e103053f643f879827d1
* server: use a leaky bucket algorithm for bytes-per-second cache rate limiting
* Use evalsha properly
* Adds redis cache limit parameters to PoliciesConfig
* Loads Leaky Bucket Script On Server Start
* Adds more redis logging and moves cache update into lua script
* reverts setex in lua and adds notes
* Refactors cacheStore and adds max TTL and cache size limits
* Filter session vars in cache key
* WIP
* parens
* cache-clear-hander POC implementation
* cache-clear-hander POC implementation
* Pro projectId used as cache key
* POC working!
* prefixing query-response keys in redis
* Add cacheClearer to RedisScripts
* Partial implementation of cacheClearer from scripts record
* updating tests
* [automated] stylish-haskell commit
* Adds query look with up with metrics script
* Adds missing module and lua script from last commit
* Changes redis script module structure to match cache clearing branch
* minor change to lua script
* cleaning up cache clearing
* generalising JsonLog
* [automated] stylish-haskell commit
* Draft Cache Metrics Endpoint
* Adds Cache Metrics Handler
* Adds hook handler module
* Missed HandlerHook module in last commit
* glob
* Fixes redis mget bug
* Removes cache totals and changes dashes to colons in metric cache keys
* Adds query param to clear clear endpoint for deleting specific keys
* Adds query param to clear clear endpoint for deleting specific keys
* Cache Metrics on query families rather then queries
* Replace Set with nub
* Base16 Redis Hashes
* Query Family Redis Keys With Roles
* response headers for cache keys
* fixing bug in family key by excluding operation name; using hash for response header instead of entire key
* Adds query family to redis cache keys and cache clear endpoint
* Fixes queryfamily hash bug
* Moves cache endpoints to /pro
* Moved cache clear to POST
* Refactors cache clear function
* Fixes query family format bug
* Adds query cache tests and optional --redis-url flag to python test suite
* Adds session variable cache test
* Update pro changelog
* adding documentation for additional caching features
* more docs
* clearing up units of leaky bucket params
* Adds comments to leaky bucket script
* removes old todo
* Fixes session variable filtering to work with new query rootfield
* more advanced defaulting behaviour for bucket rate and capacity.
* Updates Docs
* Moves Role into QueryFamily hash
* Use Aeson for Cache Clear endpoint response
* Moves trace to bracket the leaky bucket script
* Misc review tweaks
* Adds sum type for cache clear query params
* Hardcodes RegisReplyLog log level
* Update docs/graphql/cloud/response-caching.rst
Co-authored-by: Phil Freeman <phil@hasura.io>
* new prose for rate limiting docs
* [automated] stylish-haskell commit
* make rootToSessVarPreds total
* [automated] stylish-haskell commit
* Fixes out of scope error
* Renamed _acRedis to _acCacheStore
Co-authored-by: Solomon Bothwell <ssbothwell@gmail.com>
Co-authored-by: Lyndon Maydwell <lyndon@sordina.net>
Co-authored-by: David Overton <david@hasura.io>
Co-authored-by: Stylish Haskell Bot <stylish-haskell@users.noreply.github.com>
Co-authored-by: Lyndon Maydwell <lyndon@hasura.io>
GitOrigin-RevId: dda5c1a3f902967b3d78310f950541a55fabb1b0
* Stop shutdown handler retaining the whole serveCtx
This might look like quite a strange way to write the function but it's
the only way I could get GHC to not capture `serveCtx` in the shutdown
handler.
Fixes the metadata issue in #344
* Force argumentNames
The arguments list is often empty so we end up with a lot of duplicate
thunks if this value is not forced.
* Increase sharing in nullableType and nonNullableType
The previous definitions would lead to increased allocation as it would
destory any previously created sharing. The new definition only allocate
a fresh constructor if the value is changed.
* Add memoization for field parsers
It was observed in #344 that many parsers were not being memoised which
led to an increase in memory usage. This patch generalisation memoisation so
that it works for FieldParsers as well as normal Parsers.
There can still be substantial improvement made by also memoising
InputFieldParsers but that is left for future work.
Co-authored-by: Antoine Leblanc <antoine@hasura.io>
* [automated] stylish-haskell commit
* changelog
Co-authored-by: Phil Freeman <paf31@cantab.net>
Co-authored-by: Antoine Leblanc <antoine@hasura.io>
Co-authored-by: Stylish Haskell Bot <stylish-haskell@users.noreply.github.com>
Co-authored-by: Phil Freeman <phil@hasura.io>
GitOrigin-RevId: 36255f77a47cf283ea61df9d6a4f9138d4e5834c
The metadata storage implementation for graphql-engine-multitenant.
- It uses a centralized PG database to store metadata of all tenants (instead of per tenant database)
- Similarly, it uses a single schema-sync listener thread per MT worker (instead of listener thread per tenant) (PS: although, the processor thread is spawned per tenant)
- 2 new flags are introduced - `--metadataDatabaseUrl` and (optional) `--metadataDatabaseRetries`
Internally, a "metadata mode" is introduced to indicate an external/managed store vs a store managed by each pro-server.
To run :
- obtain the schema file (located at `pro/server/res/cloud/metadata_db_schema.sql`)
- apply the schema on a PG database
- set the `--metadataDatabaseUrl` flag to point to the above database
- run the MT executable
The schema (and its migrations) for the metadata db is managed outside the MT worker.
### New metadata
The following is the new portion of `Metadata` added :
```yaml
version: 3
metrics_config:
analyze_query_variables: true
analyze_response_body: false
api_limits:
disabled: false
depth_limit:
global: 5
per_role:
user: 7
editor: 9
rate_limit:
per_role:
user:
unique_params:
- x-hasura-user-id
- x-hasura-team-id
max_reqs_per_min: 20
global:
unique_params: IP
max_reqs_per_min: 10
```
- In Pro, the code around fetching/updating/syncing pro-config is removed
- That also means, `hdb_pro_catalog` for keeping the config cache is not required. Hence the `hdb_pro_catalog` is also removed
- The required config comes from metadata / schema cache
### New Metadata APIs
- `set_api_limits`
- `remove_api_limits`
- `set_metrics_config`
- `remove_metrics_config`
#### `set_api_limits`
```yaml
type: set_api_limits
args:
disabled: false
depth_limit:
global: 5
per_role:
user: 7
editor: 9
rate_limit:
per_role:
anonymous:
max_reqs_per_min: 10
unique_params: "ip"
editor:
max_reqs_per_min: 30
unique_params:
- x-hasura-user-id
user:
unique_params:
- x-hasura-user-id
- x-hasura-team-id
max_reqs_per_min: 20
global:
unique_params: IP
max_reqs_per_min: 10
```
#### `remove_api_limits`
```yaml
type: remove_api_limits
args: {}
```
#### `set_metrics_config`
```yaml
type: set_metrics_config
args:
analyze_query_variables: true
analyze_response_body: false
```
#### `remove_metrics_config`
```yaml
type: remove_metrics_config
args: {}
```
#### TODO
- [x] on-prem pro implementation for `MonadMetadataStorage`
- [x] move the project config from Lux to pro metadata (PR: #379)
- [ ] console changes for pro config/api limits, subscription workers (cc @soorajshankar @beerose)
- [x] address other minor TODOs
- [x] TxIso for `MonadSourceResolver`
- [x] enable EKG connection pool metrics
- [x] add logging of connection info when sources are added?
- [x] confirm if the `buildReason` for schema cache is correct
- [ ] testing
- [x] 1.3 -> 1.4 cloud migration script (#465; PR: #508)
- [x] one-time migration of existing metadata from users' db to centralized PG
- [x] one-time migration of pro project config + api limits + regression tests from metrics API to metadata
- [ ] integrate with infra team (WIP - cc @hgiasac)
- [x] benchmark with 1000+ tenants + each tenant making read/update metadata query every second (PR: https://github.com/hasura/graphql-engine-mono/pull/411)
- [ ] benchmark with few tenants having large metadata (100+ tables etc.)
- [ ] when user moves regions (https://github.com/hasura/lux/issues/1717)
- [ ] metadata has to be migrated from one regional PG to another
- [ ] migrate metrics data as well ?
- [ ] operation logs
- [ ] regression test runs
- [ ] find a way to share the schema files with the infra team
Co-authored-by: Naveen Naidu <30195193+Naveenaidu@users.noreply.github.com>
GitOrigin-RevId: 39e8361f2c0e96e0f9e8f8fb45e6cc14857f31f1
This PR generalizes a bunch of metadata structures.
Most importantly, it changes `SourceCache` to hold existentially quantified values:
```
data BackendSourceInfo =
forall b. Backend b => BackendSourceInfo (SourceInfo b)
type SourceCache = HashMap SourceName BackendSourceInfo
```
This changes a *lot* of things throughout the code. For now, all code using the schema cache explicitly casts sources to Postgres, meaning that if any non-Postgres `SourceInfo` makes it to the cache, it'll be ignored.
That means that after this PR is submitted, we can split work between two different aspects:
- creating `SourceInfo` for other backends
- handling those other sources down the line
GitOrigin-RevId: fb9ea00f32e840fc33c5467896fb1dfa5283ab42
### Description
Our Prelude provides the very convenient `hoistMaybe :: Maybe b -> MaybeT m b`. This PR adds hlint rules to replace uses of `MaybeT $ pure $ x` with the cleaner `hoistMaybe x`, and rules to specifically replace `MaybeT $ pure Nothing` with `empty`.
GitOrigin-RevId: 7254f4954e34e4d7ca972dc7c12073d3ab8cb0b8
Fixes https://github.com/hasura/graphql-engine/issues/5704 by checking, for aggregate fields whether we are handling a numeric aggregation.
This PR also adds type information to `ColFld` such that we know the type of the field.
This is the second attempt. See #319 for a less invasive approach. @nicuveo suggested type information might be useful, and since it wasn't hard to add, I think this version is better as well.
GitOrigin-RevId: aa6a259fd5debe9466df6302839ddbbd0ea659b5
Fixes https://github.com/hasura/graphql-engine/issues/6385
In the v1.3.4-beta.2 version, the SQL generated for a query action containing relationship and configured with permissions parsed the `x-hasura-user-id` session variable value through the `hasura.user` postgres setting instead of passing the session variables as an JSON object to the query as it was in v1.3.3.
This PR fixes the SQL generation to that of v1.3.3
Co-authored-by: Rakesh Emmadi <12475069+rakeshkky@users.noreply.github.com>
GitOrigin-RevId: 838ba812f89b51df7fcead81b9d3c2885dfa39b4
### Description
This PR updates the graphql schema to be backend-agnostic. To do so, it also moves the definition of operators to `BackendSchema`, to be specified differently per backend.
GitOrigin-RevId: 35b9d2d1bff93fb68b872d6ab0d3d12ec12c1b93
This is an incremental PR towards https://github.com/hasura/graphql-engine/pull/5797
Co-authored-by: Anon Ray <ecthiender@users.noreply.github.com>
GitOrigin-RevId: a6cb8c239b2ff840a0095e78845f682af0e588a9
An incremental PR towards https://github.com/hasura/graphql-engine/pull/5797
- Expands `MonadMetadataStorage` with operations related to async actions and setting/updating metadata
GitOrigin-RevId: 53386b7b2d007e162050b826d0708897f0b4c8f6
Since PDV, introspection queries are parsed by a certain kind of reflection where during the GraphQL schema generation, we collect all GraphQL types used during schema generation to generate answers to introspection queries. This has a great advantage, namely that we don't need to keep track of which types are being used in our schema, as this information is extracted after the fact.
But what happens when we encounter two types with the same name in the GraphQL schema? Well, they better be the same, otherwise we likely made a programming error. So what do we do when we *do* encounter a conflict? So far, we've been throwing a rather generic error message, namely `found conflicting definitions for <typename> when collecting types from the schema`. It does not specify what the conflict is, or how it arose. In fact, I'm a little bit hesitant to output more information about what the conflict is, because we support many different kinds of GraphQL types, and these can have disagreements in many different ways. It'd be a bit tiring (not to mention error-prone) to spell this out explicitly for all types. And, in any case, at the moment our equality checks for types is incorrect anyway, as we are avoiding implementing a certain recursive equality checking algorithm.
As it turns out, type conflicts arise not just due to programming errors, but also arise naturally under certain configurations. @codingkarthik encountered an interesting case recently where adding a specific remote and a single unrelated database table would result in a conflict in our Relay schema. It was not readily visible how this conflict arose: this took significant engineering effort.
This adds stack traces to type collection, so that we can inform the user where the type conflict is taking place. The origin of the above conflict can easily be spotted using this PR. Here's a sample error message:
```
Found conflicting definitions for "PageInfo". The definition at "mutation_root.UpdateUser.favourites.anime.edges.node.characters.pageInfo" differs from the the definition at "query_root.test_connection.pageInfo"
```
Co-authored-by: Antoine Leblanc <antoine@hasura.io>
GitOrigin-RevId: d4c01c243022d8570b3c057b168a61c3033244ff
* Add update_by_pk test with more interesting permissions.
* Add new delete test with more interesting permissions.
* Fix byPk operations not providing all columns.
* Empty commit to unlock ci.
GitOrigin-RevId: eb1ca2cc4c59f421bc5fedf49bef91aa4bbdca94
This PR makes a bunch of schema generation code in Hasura.GraphQL.Schema backend-agnostic, by moving the backend-specific parts into a new BackendSchema type class. This way, the schema generation code can be reused for other backends, simply by implementing new instances of the BackendSchema type class.
This work is now in a state where the schema generators are sufficiently generic to accept the implementation of a new backend. That means that we can start exposing MS SQL schema. Execution is not implemented yet, of course.
The branch currently does not support computed fields or Relay. This is, in a sense, intentional: computed field support is normally baked into the schema generation (through the fieldSelection schema generator), and so this branch shows a programming technique that allows us to expose certain GraphQL schema depending on backend support. We can write support for computed fields and Relay at a later stage.
Co-authored-by: Antoine Leblanc <antoine@hasura.io>
GitOrigin-RevId: df369fc3d189cbda1b931d31678e9450a6601314
