Use static membership for devserver

[stephanos]

What was changed

Use static membership assignment for server services.

Why?

Fixes #632 and #633.

Checklist

1. Closes

2. How was this tested:

(1) used a script to verify the behavior

Before change:

go build ./cmd/temporal
Iteration 1/10
Error: 'Frontend is not healthy yet' found.
Killing the Temporal server with PID 21433...

go build ./cmd/temporal
Iteration 1/10
Killing the Temporal server with PID 21600...
Iteration 2/10
Error: 'Not enough hosts to serve the request' found.
Killing the Temporal server with PID 21613...

After change:

go build ./cmd/temporal
Iteration 1/10
Killing the Temporal server with PID 21190...
Iteration 2/10
Killing the Temporal server with PID 21198...
Iteration 3/10
Killing the Temporal server with PID 21206...
Iteration 4/10
Killing the Temporal server with PID 21214...
Iteration 5/10
Killing the Temporal server with PID 21222...
Iteration 6/10
Killing the Temporal server with PID 21230...
Iteration 7/10
Killing the Temporal server with PID 21237...
Iteration 8/10
Killing the Temporal server with PID 21243...
Iteration 9/10
Killing the Temporal server with PID 21251...
Iteration 10/10
Killing the Temporal server with PID 21257...

Script

#!/bin/bash

make build

SERVER_PID=0
kill_server() {
    if [ $SERVER_PID -ne 0 ]; then
        echo "Killing the Temporal server with PID $SERVER_PID..."
        kill $SERVER_PID
        wait $SERVER_PID 2>/dev/null
        SERVER_PID=0
        rm -rf server_output.log
    fi
}
trap kill_server EXIT

# Loop to run the start-stop sequence 10 times
for i in {1..10}; do
    echo "Iteration $i/10"

    ./temporal server start-dev --db-filename=/tmp/db > server_output.log 2>&1 &
    SERVER_PID=$!

    sleep 2

    if grep -q "Not enough hosts to serve the request" server_output.log; then
        echo "Error: 'Not enough hosts to serve the request' found."
        kill $SERVER_PID
        exit 1
    fi

    if grep -q "Frontend is not healthy yet" server_output.log; then
        echo "Error: 'Frontend is not healthy yet' found."
        kill $SERVER_PID
        exit 1
    fi

    kill_server

    sleep 1
done

(2) ran sdk-go integration tests against dev server

3. Any docs updates needed?

[mjameswh]

I expect this should make it possible to remove assignation of membership ports, which is a good thing.

	conf.RPC.MembershipPort = MustGetFreePort("127.0.0.1")

[dandavison]

LGTM! I'm not previously familiar with this configuration but it looks reasonable to me and I can confirm that it fixes #632.