Distributed Services with Go

Implement Raft in Our Service

We have a log that can write and read records on one computer. We want a distributed log that’s replicated on multiple computers, so let’s implement Raft in our service to get that.

Install Raft by running this command:

$ go get github.com/hashicorp/raft@v1.1.1
$ # use etcd's fork of Ben Johnson's Bolt key/value store,
$ # which includes fixes for Go 1.14+
$ go mod edit -replace github.com/hashicorp/raft-boltdb=\
github.com/travisjeffery/raft-boltdb@v1.0.0

In the internal/log directory, create a distributed.go file, beginning with this snippet:

CoordinateWithConsensus/internal/log/distributed.go

package log

import (
        "bytes"
        "crypto/tls"
        "fmt"
        "io"
        "net"
        "os"
        "path/filepath" ...