mirror of https://github.com/hashicorp/consul
18b29c45c4
This PR is almost a complete rewrite of the ACL system within Consul. It brings the features more in line with other HashiCorp products. Obviously there is quite a bit left to do here but most of it is related docs, testing and finishing the last few commands in the CLI. I will update the PR description and check off the todos as I finish them over the next few days/week. Description At a high level this PR is mainly to split ACL tokens from Policies and to split the concepts of Authorization from Identities. A lot of this PR is mostly just to support CRUD operations on ACLTokens and ACLPolicies. These in and of themselves are not particularly interesting. The bigger conceptual changes are in how tokens get resolved, how backwards compatibility is handled and the separation of policy from identity which could lead the way to allowing for alternative identity providers. On the surface and with a new cluster the ACL system will look very similar to that of Nomads. Both have tokens and policies. Both have local tokens. The ACL management APIs for both are very similar. I even ripped off Nomad's ACL bootstrap resetting procedure. There are a few key differences though. Nomad requires token and policy replication where Consul only requires policy replication with token replication being opt-in. In Consul local tokens only work with token replication being enabled though. All policies in Nomad are globally applicable. In Consul all policies are stored and replicated globally but can be scoped to a subset of the datacenters. This allows for more granular access management. Unlike Nomad, Consul has legacy baggage in the form of the original ACL system. The ramifications of this are: A server running the new system must still support other clients using the legacy system. A client running the new system must be able to use the legacy RPCs when the servers in its datacenter are running the legacy system. The primary ACL DC's servers running in legacy mode needs to be a gate that keeps everything else in the entire multi-DC cluster running in legacy mode. So not only does this PR implement the new ACL system but has a legacy mode built in for when the cluster isn't ready for new ACLs. Also detecting that new ACLs can be used is automatic and requires no configuration on the part of administrators. This process is detailed more in the "Transitioning from Legacy to New ACL Mode" section below. |
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retry | ||
README.md | ||
io.go | ||
server.go | ||
server_methods.go | ||
server_wrapper.go |
README.md
Consul Testing Utilities
This package provides some generic helpers to facilitate testing in Consul.
TestServer
TestServer is a harness for managing Consul agents and initializing them with
test data. Using it, you can form test clusters, create services, add health
checks, manipulate the K/V store, etc. This test harness is completely decoupled
from Consul's core and API client, meaning it can be easily imported and used in
external unit tests for various applications. It works by invoking the Consul
CLI, which means it is a requirement to have Consul installed in the $PATH
.
Following is an example usage:
package my_program
import (
"testing"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testutil"
)
func TestFoo_bar(t *testing.T) {
// Create a test Consul server
srv1, err := testutil.NewTestServer()
if err != nil {
t.Fatal(err)
}
defer srv1.Stop()
// Create a secondary server, passing in configuration
// to avoid bootstrapping as we are forming a cluster.
srv2, err := testutil.NewTestServerConfig(t, func(c *testutil.TestServerConfig) {
c.Bootstrap = false
})
if err != nil {
t.Fatal(err)
}
defer srv2.Stop()
// Join the servers together
srv1.JoinLAN(t, srv2.LANAddr)
// Create a test key/value pair
srv1.SetKV(t, "foo", []byte("bar"))
// Create lots of test key/value pairs
srv1.PopulateKV(t, map[string][]byte{
"bar": []byte("123"),
"baz": []byte("456"),
})
// Create a service
srv1.AddService(t, "redis", structs.HealthPassing, []string{"master"})
// Create a service that will be accessed in target source code
srv1.AddAccessibleService("redis", structs.HealthPassing, "127.0.0.1", 6379, []string{"master"})
// Create a service check
srv1.AddCheck(t, "service:redis", "redis", structs.HealthPassing)
// Create a node check
srv1.AddCheck(t, "mem", "", structs.HealthCritical)
// The HTTPAddr field contains the address of the Consul
// API on the new test server instance.
println(srv1.HTTPAddr)
// All functions also have a wrapper method to limit the passing of "t"
wrap := srv1.Wrap(t)
wrap.SetKV("foo", []byte("bar"))
}