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* dns token fix whitespace for docs and comments fix test cases fix test cases remove tabs in help text Add changelog Peering dns test Peering dns test Partial implementation of Peered DNS test Swap to new topology lib expose dns port for integration tests on client remove partial test implementation remove extra port exposure remove changelog from the ent pr Add dns token to set-agent-token switch Add enterprise golden file Use builtin/dns template in tests Update ent dns policy Update ent dns template test remove local gen certs fix templated policy specs * add changelog * go mod tidy |
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| .. | ||
| sprawl | ||
| topology | ||
| util | ||
| .gitignore | ||
| README.md | ||
| TODO.md | ||
| go.mod | ||
| go.sum | ||
README.md
Summary
This is a Go library used to launch one or more Consul clusters that can be
peered using the cluster peering feature. Under the covers terraform is used
in conjunction with the
kreuzwerker/docker
provider to manage a fleet of local docker containers and networks.
Configuration
The complete topology of Consul clusters is defined using a topology.Config
which allows you to define a set of networks and reference those networks when
assigning nodes and services to clusters. Both Consul clients and
consul-dataplane instances are supported.
Here is an example configuration with two peered clusters:
cfg := &topology.Config{
Networks: []*topology.Network{
{Name: "dc1"},
{Name: "dc2"},
{Name: "wan", Type: "wan"},
},
Clusters: []*topology.Cluster{
{
Name: "dc1",
Nodes: []*topology.Node{
{
Kind: topology.NodeKindServer,
Name: "dc1-server1",
Addresses: []*topology.Address{
{Network: "dc1"},
{Network: "wan"},
},
},
{
Kind: topology.NodeKindClient,
Name: "dc1-client1",
Services: []*topology.Service{
{
ID: topology.ServiceID{Name: "mesh-gateway"},
Port: 8443,
EnvoyAdminPort: 19000,
IsMeshGateway: true,
},
},
},
{
Kind: topology.NodeKindClient,
Name: "dc1-client2",
Services: []*topology.Service{
{
ID: topology.ServiceID{Name: "ping"},
Image: "rboyer/pingpong:latest",
Port: 8080,
EnvoyAdminPort: 19000,
Command: []string{
"-bind", "0.0.0.0:8080",
"-dial", "127.0.0.1:9090",
"-pong-chaos",
"-dialfreq", "250ms",
"-name", "ping",
},
Upstreams: []*topology.Upstream{{
ID: topology.ServiceID{Name: "pong"},
LocalPort: 9090,
Peer: "peer-dc2-default",
}},
},
},
},
},
InitialConfigEntries: []api.ConfigEntry{
&api.ExportedServicesConfigEntry{
Name: "default",
Services: []api.ExportedService{{
Name: "ping",
Consumers: []api.ServiceConsumer{{
Peer: "peer-dc2-default",
}},
}},
},
},
},
{
Name: "dc2",
Nodes: []*topology.Node{
{
Kind: topology.NodeKindServer,
Name: "dc2-server1",
Addresses: []*topology.Address{
{Network: "dc2"},
{Network: "wan"},
},
},
{
Kind: topology.NodeKindClient,
Name: "dc2-client1",
Services: []*topology.Service{
{
ID: topology.ServiceID{Name: "mesh-gateway"},
Port: 8443,
EnvoyAdminPort: 19000,
IsMeshGateway: true,
},
},
},
{
Kind: topology.NodeKindDataplane,
Name: "dc2-client2",
Services: []*topology.Service{
{
ID: topology.ServiceID{Name: "pong"},
Image: "rboyer/pingpong:latest",
Port: 8080,
EnvoyAdminPort: 19000,
Command: []string{
"-bind", "0.0.0.0:8080",
"-dial", "127.0.0.1:9090",
"-pong-chaos",
"-dialfreq", "250ms",
"-name", "pong",
},
Upstreams: []*topology.Upstream{{
ID: topology.ServiceID{Name: "ping"},
LocalPort: 9090,
Peer: "peer-dc1-default",
}},
},
},
},
},
InitialConfigEntries: []api.ConfigEntry{
&api.ExportedServicesConfigEntry{
Name: "default",
Services: []api.ExportedService{{
Name: "ping",
Consumers: []api.ServiceConsumer{{
Peer: "peer-dc2-default",
}},
}},
},
},
},
},
Peerings: []*topology.Peering{{
Dialing: topology.PeerCluster{
Name: "dc1",
},
Accepting: topology.PeerCluster{
Name: "dc2",
},
}},
}
Once you have a topology configuration, you simply call the appropriate
Launch function to validate and boot the cluster.
You may also modify your original configuration (in some allowed ways) and call
Relaunch on an existing topology which will differentially adjust the running
infrastructure. This can be useful to do things like upgrade instances in place
or subly reconfigure them.
For Testing
It is meant to be consumed primarily by unit tests desiring a complex
reasonably realistic Consul setup. For that use case use the sprawl/sprawltest wrapper:
func TestSomething(t *testing.T) {
cfg := &topology.Config{...}
sp := sprawltest.Launch(t, cfg)
// do stuff with 'sp'
}