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feat: introduce cluster agent

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This commit is contained in:
0x1d
2025-05-13 21:59:44 +02:00
parent ee0489dcbb
commit 49014c951f
12 changed files with 485 additions and 18 deletions
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7
Makefile
View File

@@ -37,9 +37,10 @@ run: build
bin/rcond-${ARCH} -config config/rcond.yaml bin/rcond-${ARCH} -config config/rcond.yaml
dev: dev:
RCOND_ADDR=127.0.0.1:8080 \ go run cmd/rcond/main.go -config config/rcond.yaml
RCOND_API_TOKEN=1234567890 \
go run cmd/rcond/main.go dev-agent:
go run cmd/rcond/main.go -config config/rcond-agent.yaml
upload: upload:
scp bin/rcond-${ARCH} pi@192.168.1.43:/home/pi/rcond scp bin/rcond-${ARCH} pi@192.168.1.43:/home/pi/rcond

46
README.md
View File

@@ -7,6 +7,7 @@ A simple daemon and REST API designed to simplify the management of various syst
- System hostname: Dynamically update the system's hostname - System hostname: Dynamically update the system's hostname
- Authorized SSH keys: Directly managing the user's authorized_keys file to securely add, remove, or modify authorized SSH keys - Authorized SSH keys: Directly managing the user's authorized_keys file to securely add, remove, or modify authorized SSH keys
- System state: Restart and shutdown the system - System state: Restart and shutdown the system
- Cluster: Join and manage a cluster of rcond nodes
## Requirements ## Requirements
@@ -43,14 +44,22 @@ The dev target will run the main.go directly with environment variable configura
make dev make dev
``` ```
## Configuration You can also run a cluster agent in dev mode:
### File ```sh
make dev-agent
```
## Configuration
The default config file location is `/etc/rcond/config.yaml`. The default config file location is `/etc/rcond/config.yaml`.
It can be overwritten by environment variables and flags. It can be overwritten by environment variables and flags.
An full example configuration with comments can be found in `config/rcond.yaml` An full example configuration with comments can be found in `config/rcond.yaml`
### API Server
The API server is the main component of the rcond daemon. It is responsible for managing the host and providing a REST API for managing the system.
Example configuration: Example configuration:
```yaml ```yaml
rcond: rcond:
@@ -58,6 +67,38 @@ rcond:
api_token: 1234567890 api_token: 1234567890
``` ```
### Cluster
The cluster agent is a component of rcond that is responsible for joining and managing a cluster of rcond nodes.
This functionality can be used to manage and configure multiple hosts through a single API server.
In the background, the cluster agent will use [Serf](https://github.com/hashicorp/serf) to form a cluster, handle node discovery and gossip.
Forming a cluster is optional and can be enabled by configuring the cluster section in the config file.
Example configuration:
```yaml
cluster:
# Enable the cluster agent
enabled: true
# Name of the node in the cluster
node_name: rcond
# Secret key for the cluster agent used for message encryption.
# Must be 32 bytes long and base64 encoded.
# Generate with: base64 /dev/urandom | tr -d '\n' | head -c 32
secret_key: DMXnaJUUbIBMj1Df0dPsQY+Sks1VxWTa
# Advertise address for the cluster agent
advertise_addr: 0.0.0.0
# Advertise port for the cluster agent
advertise_port: 7946
# Bind address for the cluster agent
bind_addr: 0.0.0.0
# Bind port for the cluster agent
bind_port: 7946
# Join addresses for the cluster agent
join:
- 127.0.0.1:7947
```
### Environment Variables ### Environment Variables
| Environment Variable | Description | Default | | Environment Variable | Description | Default |
@@ -88,6 +129,7 @@ All endpoints except `/health` require authentication via an API token passed in
| DELETE | `/users/{user}/keys/{fingerprint}` | Remove an authorized SSH key | | DELETE | `/users/{user}/keys/{fingerprint}` | Remove an authorized SSH key |
| POST | `/system/restart` | Restart the system | | POST | `/system/restart` | Restart the system |
| POST | `/system/shutdown` | Shutdown the system | | POST | `/system/shutdown` | Shutdown the system |
| GET | `/cluster/members` | Get the cluster members |
### Response Codes ### Response Codes

66
api/rcond.yaml
View File

@@ -536,4 +536,68 @@ paths:
application/json: application/json:
schema: schema:
$ref: '#/components/schemas/Error' $ref: '#/components/schemas/Error'
/cluster/members:
get:
summary: Get cluster members
description: Returns the list of nodes in the cluster
responses:
'200':
description: Cluster members retrieved successfully
content:
application/json:
schema:
type: array
items:
type: object
properties:
Name:
type: string
description: Node name
example: "rcond-agent"
Addr:
type: string
description: Node address
example: "192.168.1.100"
Port:
type: integer
description: Node port
example: 8080
Tags:
type: object
description: Node tags
example: {"role": "web", "env": "prod"}
Status:
type: integer
description: Node status
example: 1
ProtocolMin:
type: integer
description: Minimum protocol version
example: 1
ProtocolMax:
type: integer
description: Maximum protocol version
example: 1
ProtocolCur:
type: integer
description: Current protocol version
example: 1
DelegateMin:
type: integer
description: Minimum delegate version
example: 1
DelegateMax:
type: integer
description: Maximum delegate version
example: 1
DelegateCur:
type: integer
description: Current delegate version
example: 1
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Error'

46
cmd/rcond/main.go
View File

@@ -8,6 +8,7 @@ import (
"log" "log"
"os" "os"
"github.com/0x1d/rcond/pkg/cluster"
"github.com/0x1d/rcond/pkg/config" "github.com/0x1d/rcond/pkg/config"
http "github.com/0x1d/rcond/pkg/http" http "github.com/0x1d/rcond/pkg/http"
) )
@@ -25,15 +26,11 @@ func main() {
os.Exit(1) os.Exit(1)
} }
srv := http.NewServer(appConfig) clusterAgent := startClusterAgent(appConfig)
srv.RegisterRoutes() startApiServer(appConfig, clusterAgent)
log.Printf("Starting server on %s", appConfig.Rcond.Addr) select {}
if err := srv.Start(); err != nil {
log.Fatal(err)
}
} }
func loadConfig() (*config.Config, error) { func loadConfig() (*config.Config, error) {
configPath := "/etc/rcond/config.yaml" configPath := "/etc/rcond/config.yaml"
appConfig := &config.Config{} appConfig := &config.Config{}
@@ -81,6 +78,41 @@ func loadConfig() (*config.Config, error) {
return appConfig, nil return appConfig, nil
} }
func startApiServer(appConfig *config.Config, clusterAgent *cluster.Agent) *http.Server {
srv := http.NewServer(appConfig)
srv.WithClusterAgent(clusterAgent)
srv.RegisterRoutes()
log.Printf("Starting API server on %s", appConfig.Rcond.Addr)
if err := srv.Start(); err != nil {
log.Fatal(err)
}
return srv
}
func startClusterAgent(appConfig *config.Config) *cluster.Agent {
clusterConfig := &appConfig.Cluster
if clusterConfig.Enabled {
log.Printf("Starting cluster agent on %s:%d", clusterConfig.BindAddr, clusterConfig.BindPort)
clusterAgent, err := cluster.NewAgent(clusterConfig)
if err != nil {
log.Fatal(err)
}
// join nodes in the cluster if the join addresses are provided
if len(clusterConfig.Join) > 0 {
clusterAgent.Join(clusterConfig.Join, true)
}
// get members in the cluster
members, err := clusterAgent.Members()
if err != nil {
log.Fatal(err)
}
log.Printf("Members: %v", members)
return clusterAgent
}
return nil
}
func overrideConfigValuesFromEnv(envMap map[string]*string) { func overrideConfigValuesFromEnv(envMap map[string]*string) {
for varName, configValue := range envMap { for varName, configValue := range envMap {
if envValue, ok := os.LookupEnv(varName); ok { if envValue, ok := os.LookupEnv(varName); ok {

15
config/rcond-agent.yaml Normal file
View File

@@ -0,0 +1,15 @@
# This is an example configuration file for running a cluster agent.
rcond:
addr: 0.0.0.0:8081
api_token: 1234567890
cluster:
enabled: true
node_name: rcond-agent
secret_key: DMXnaJUUbIBMj1Df0dPsQY+Sks1VxWTa
advertise_addr: 0.0.0.0
advertise_port: 7947
bind_addr: 0.0.0.0
bind_port: 7947
join:
- 127.0.0.1:7946

21
config/rcond.yaml
View File

@@ -3,3 +3,24 @@ rcond:
addr: 0.0.0.0:8080 addr: 0.0.0.0:8080
# API token to use for authentication # API token to use for authentication
api_token: 1234567890 api_token: 1234567890
cluster:
# Enable the cluster agent
enabled: true
# Name of the node in the cluster
node_name: rcond
# Secret key for the cluster agent used for message encryption.
# Must be 32 bytes long and base64 encoded.
# Generate with: base64 /dev/urandom | tr -d '\n' | head -c 32
secret_key: DMXnaJUUbIBMj1Df0dPsQY+Sks1VxWTa
# Advertise address for the cluster agent
advertise_addr: 0.0.0.0
# Advertise port for the cluster agent
advertise_port: 7946
# Bind address for the cluster agent
bind_addr: 0.0.0.0
# Bind port for the cluster agent
bind_port: 7946
# Join addresses for the cluster agent
#join:
# - 127.0.0.1:7947

16
go.mod
View File

@@ -10,13 +10,29 @@ require (
github.com/godbus/dbus/v5 v5.1.0 github.com/godbus/dbus/v5 v5.1.0
github.com/google/uuid v1.6.0 github.com/google/uuid v1.6.0
github.com/gorilla/mux v1.8.1 github.com/gorilla/mux v1.8.1
github.com/hashicorp/serf v0.10.2
github.com/stretchr/testify v1.10.0 github.com/stretchr/testify v1.10.0
golang.org/x/crypto v0.37.0 golang.org/x/crypto v0.37.0
gopkg.in/yaml.v3 v3.0.1 gopkg.in/yaml.v3 v3.0.1
) )
require ( require (
github.com/armon/go-metrics v0.4.1 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect github.com/davecgh/go-spew v1.1.1 // indirect
github.com/google/btree v1.1.2 // indirect
github.com/hashicorp/errwrap v1.1.0 // indirect
github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
github.com/hashicorp/go-metrics v0.5.4 // indirect
github.com/hashicorp/go-msgpack/v2 v2.1.2 // indirect
github.com/hashicorp/go-multierror v1.1.1 // indirect
github.com/hashicorp/go-sockaddr v1.0.5 // indirect
github.com/hashicorp/golang-lru v1.0.2 // indirect
github.com/hashicorp/memberlist v0.5.2 // indirect
github.com/miekg/dns v1.1.56 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 // indirect
golang.org/x/mod v0.13.0 // indirect
golang.org/x/net v0.21.0 // indirect
golang.org/x/sys v0.32.0 // indirect golang.org/x/sys v0.32.0 // indirect
golang.org/x/tools v0.14.0 // indirect
) )

181
go.sum
View File

@@ -1,22 +1,201 @@
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
github.com/armon/go-metrics v0.4.1 h1:hR91U9KYmb6bLBYLQjyM+3j+rcd/UhE+G78SFnF8gJA=
github.com/armon/go-metrics v0.4.1/go.mod h1:E6amYzXo6aW1tqzoZGT755KkbgrJsSdpwZ+3JqfkOG4=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk= github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA= github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=
github.com/google/btree v1.1.2/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0= github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY= github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ= github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I=
github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
github.com/hashicorp/go-cleanhttp v0.5.0/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
github.com/hashicorp/go-immutable-radix v1.3.1 h1:DKHmCUm2hRBK510BaiZlwvpD40f8bJFeZnpfm2KLowc=
github.com/hashicorp/go-immutable-radix v1.3.1/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
github.com/hashicorp/go-metrics v0.5.4 h1:8mmPiIJkTPPEbAiV97IxdAGNdRdaWwVap1BU6elejKY=
github.com/hashicorp/go-metrics v0.5.4/go.mod h1:CG5yz4NZ/AI/aQt9Ucm/vdBnbh7fvmv4lxZ350i+QQI=
github.com/hashicorp/go-msgpack/v2 v2.1.2 h1:4Ee8FTp834e+ewB71RDrQ0VKpyFdrKOjvYtnQ/ltVj0=
github.com/hashicorp/go-msgpack/v2 v2.1.2/go.mod h1:upybraOAblm4S7rx0+jeNy+CWWhzywQsSRV5033mMu4=
github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
github.com/hashicorp/go-retryablehttp v0.5.3/go.mod h1:9B5zBasrRhHXnJnui7y6sL7es7NDiJgTc6Er0maI1Xs=
github.com/hashicorp/go-sockaddr v1.0.5 h1:dvk7TIXCZpmfOlM+9mlcrWmWjw/wlKT+VDq2wMvfPJU=
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google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

55
pkg/cluster/agent.go Normal file
View File

@@ -0,0 +1,55 @@
package cluster
import (
"log"
"github.com/0x1d/rcond/pkg/config"
"github.com/hashicorp/serf/serf"
)
type Agent struct {
Serf *serf.Serf
}
func NewAgent(clusterConfig *config.ClusterConfig) (*Agent, error) {
config := serf.DefaultConfig()
config.NodeName = clusterConfig.NodeName
config.ProtocolVersion = serf.ProtocolVersionMax
config.MemberlistConfig.SecretKey = []byte(clusterConfig.SecretKey)
config.MemberlistConfig.AdvertiseAddr = clusterConfig.AdvertiseAddr
config.MemberlistConfig.AdvertisePort = clusterConfig.AdvertisePort
config.MemberlistConfig.BindAddr = clusterConfig.BindAddr
config.MemberlistConfig.BindPort = clusterConfig.BindPort
serf, err := serf.Create(config)
if err != nil {
return nil, err
}
return &Agent{Serf: serf}, nil
}
func (a *Agent) Members() ([]serf.Member, error) {
log.Printf("Getting members of the cluster")
return a.Serf.Members(), nil
}
func (a *Agent) Join(addrs []string, ignoreOld bool) (int, error) {
log.Printf("Joining nodes in the cluster: %v", addrs)
n, err := a.Serf.Join(addrs, ignoreOld)
if err != nil {
log.Printf("Failed to join nodes in the cluster: %v", err)
return 0, err
}
log.Printf("Joined %d nodes in the cluster", n)
return n, nil
}
func (a *Agent) Leave() error {
return a.Serf.Leave()
}
func (a *Agent) Shutdown() error {
log.Printf("Shutting down cluster agent")
return a.Serf.Shutdown()
}

14
pkg/config/config.go
View File

@@ -7,7 +7,8 @@ import (
) )
type Config struct { type Config struct {
Rcond RcondConfig `yaml:"rcond"` Rcond RcondConfig `yaml:"rcond"`
Cluster ClusterConfig `yaml:"cluster"`
} }
type RcondConfig struct { type RcondConfig struct {
@@ -15,6 +16,17 @@ type RcondConfig struct {
ApiToken string `yaml:"api_token"` ApiToken string `yaml:"api_token"`
} }
type ClusterConfig struct {
Enabled bool `yaml:"enabled"`
NodeName string `yaml:"node_name"`
SecretKey string `yaml:"secret_key"`
Join []string `yaml:"join"`
AdvertiseAddr string `yaml:"advertise_addr"`
AdvertisePort int `yaml:"advertise_port"`
BindAddr string `yaml:"bind_addr"`
BindPort int `yaml:"bind_port"`
}
func LoadConfig(path string) (*Config, error) { func LoadConfig(path string) (*Config, error) {
yamlFile, err := os.ReadFile(path) yamlFile, err := os.ReadFile(path)
if err != nil { if err != nil {

22
pkg/http/handlers.go
View File

@@ -6,6 +6,7 @@ import (
"log" "log"
"net/http" "net/http"
"github.com/0x1d/rcond/pkg/cluster"
network "github.com/0x1d/rcond/pkg/network" network "github.com/0x1d/rcond/pkg/network"
"github.com/0x1d/rcond/pkg/system" "github.com/0x1d/rcond/pkg/system"
"github.com/0x1d/rcond/pkg/user" "github.com/0x1d/rcond/pkg/user"
@@ -287,3 +288,24 @@ func HandleShutdown(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json") w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(map[string]string{"status": "success"}) json.NewEncoder(w).Encode(map[string]string{"status": "success"})
} }
func ClusterAgentWrapper(agent *cluster.Agent) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
HandleClusterMembers(w, r, agent)
}
}
func HandleClusterMembers(w http.ResponseWriter, r *http.Request, agent *cluster.Agent) {
if agent == nil {
writeError(w, "cluster agent is not initialized", http.StatusInternalServerError)
return
}
members, err := agent.Members()
if err != nil {
writeError(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(members)
}

14
pkg/http/server.go
View File

@@ -6,14 +6,16 @@ import (
"net/http" "net/http"
"time" "time"
"github.com/0x1d/rcond/pkg/cluster"
"github.com/0x1d/rcond/pkg/config" "github.com/0x1d/rcond/pkg/config"
"github.com/gorilla/mux" "github.com/gorilla/mux"
) )
type Server struct { type Server struct {
router *mux.Router router *mux.Router
srv *http.Server srv *http.Server
apiToken string apiToken string
clusterAgent *cluster.Agent
} }
func NewServer(cfg *config.Config) *Server { func NewServer(cfg *config.Config) *Server {
@@ -37,6 +39,11 @@ func NewServer(cfg *config.Config) *Server {
} }
} }
func (s *Server) WithClusterAgent(agent *cluster.Agent) *Server {
s.clusterAgent = agent
return s
}
func (s *Server) Start() error { func (s *Server) Start() error {
return s.srv.ListenAndServe() return s.srv.ListenAndServe()
} }
@@ -69,6 +76,7 @@ func (s *Server) RegisterRoutes() {
s.router.HandleFunc("/users/{user}/keys/{fingerprint}", s.verifyToken(HandleRemoveAuthorizedKey)).Methods(http.MethodDelete) s.router.HandleFunc("/users/{user}/keys/{fingerprint}", s.verifyToken(HandleRemoveAuthorizedKey)).Methods(http.MethodDelete)
s.router.HandleFunc("/system/restart", s.verifyToken(HandleReboot)).Methods(http.MethodPost) s.router.HandleFunc("/system/restart", s.verifyToken(HandleReboot)).Methods(http.MethodPost)
s.router.HandleFunc("/system/shutdown", s.verifyToken(HandleShutdown)).Methods(http.MethodPost) s.router.HandleFunc("/system/shutdown", s.verifyToken(HandleShutdown)).Methods(http.MethodPost)
s.router.HandleFunc("/cluster/members", s.verifyToken(ClusterAgentWrapper(s.clusterAgent))).Methods(http.MethodGet)
} }
func (s *Server) healthHandler(w http.ResponseWriter, r *http.Request) { func (s *Server) healthHandler(w http.ResponseWriter, r *http.Request) {