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dbstatus_test.go
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dbstatus_test.go
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package dbfailover
import (
"database/sql"
"testing"
"time"
)
func TestMergeStatus(t *testing.T) {
tests := []struct {
msg string
rs readOnlyStatus
ss slaveStatus
ws wsrepStatus
want dbStatus
}{
{
msg: "read-only check failed",
rs: readOnlyStatus{
online: false,
},
ss: slaveStatus{
online: true,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "slave check failed, writable server",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: false,
},
want: dbStatus{
role: roleMaster,
},
},
{
msg: "slave check failed, read-only server",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: false,
},
want: dbStatus{
role: roleSlave,
},
},
{
msg: "perfect master",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: false,
},
want: dbStatus{
role: roleMaster,
},
},
{
msg: "perfect master, failed wsrep",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: false,
},
ws: wsrepStatus{
online: true,
ready: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "perfect master, good wsrep",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: false,
},
ws: wsrepStatus{
online: true,
ready: true,
},
want: dbStatus{
role: roleMaster,
},
},
{
msg: "master with old slave config",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: false,
runningSQL: false,
},
want: dbStatus{
role: roleMaster,
},
},
{
msg: "failed slave, without read-only",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "writable slave",
rs: readOnlyStatus{
online: true,
readOnly: false,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: true,
},
want: dbStatus{
role: roleSlave,
},
},
{
msg: "perfect slave",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: true,
},
want: dbStatus{
role: roleSlave,
},
},
{
msg: "perfect slave, failed wsrep",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: true,
},
ws: wsrepStatus{
online: true,
ready: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "perfect slave, good wsrep",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: true,
},
ws: wsrepStatus{
online: true,
ready: true,
},
want: dbStatus{
role: roleSlave,
},
},
{
msg: "perfect slave, but too high replication delay",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: true,
delay: time.Hour,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "failed slave",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: true,
runningSQL: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "stopped slave",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: true,
runningIO: false,
runningSQL: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "read-only server without slave config",
rs: readOnlyStatus{
online: true,
readOnly: true,
},
ss: slaveStatus{
online: true,
configured: false,
},
want: dbStatus{
role: roleOffline,
},
},
{
msg: "max latency",
rs: readOnlyStatus{
online: true,
latency: 1 * time.Second,
},
ss: slaveStatus{
online: true,
latency: 2 * time.Second,
},
want: dbStatus{
role: roleMaster,
latency: 2 * time.Second,
},
},
}
for _, test := range tests {
t.Run(test.msg, func(t *testing.T) {
got := mergeStatus(test.ss, test.rs, test.ws, defaultMaxReplicationDelay)
if got != test.want {
t.Errorf("rs: %v, ss: %v, expected: %v, got: %v", test.rs, test.ss, test.want, got)
}
})
}
}
func TestSlaveStatus(t *testing.T) {
pool := getDockerPool(t)
network := getDockerNetwork(t, pool)
defer pool.RemoveNetwork(network)
offline := startOfflineInstance(t)
master, masterResource := startMasterInstance(t, pool, network)
defer pool.Purge(masterResource)
stoppedSlave, stoppedSlaveResource := startSlaveInstance(t, pool, network, master)
defer pool.Purge(stoppedSlaveResource)
if _, err := stoppedSlave.Exec("STOP SLAVE"); err != nil {
t.Fatalf("failed to prepare stopped slave: %v", err)
}
failedSlave, failedSlaveResource := startSlaveInstance(t, pool, network, master)
defer pool.Purge(failedSlaveResource)
if _, err := failedSlave.Exec("CREATE USER a@localhost"); err != nil {
t.Fatalf("executing DML on slave to fail replication: %v", err)
}
if _, err := master.Exec("CREATE USER a@localhost"); err != nil {
t.Fatalf("executing DML on master to fail replication: %v", err)
}
goodSlave, goodSlaveResource := startSlaveInstance(t, pool, network, master)
defer pool.Purge(goodSlaveResource)
tests := []struct {
msg string
db *sql.DB
online bool
configured bool
runningIO bool
runningSQL bool
}{
{
msg: "offline",
db: offline,
online: false,
configured: false,
runningIO: false,
runningSQL: false,
},
{
msg: "master",
db: master,
online: true,
configured: false,
runningIO: false,
runningSQL: false,
},
{
msg: "stopped slave",
db: stoppedSlave,
online: true,
configured: true,
runningIO: false,
runningSQL: false,
},
{
msg: "failed slave",
db: failedSlave,
online: true,
configured: true,
runningIO: true,
runningSQL: false,
},
{
msg: "running slave",
db: goodSlave,
online: true,
configured: true,
runningIO: true,
runningSQL: true,
},
}
for _, test := range tests {
t.Run(test.msg, func(t *testing.T) {
status := checkSlaveStatus(test.db, defaultCheckTimeout)
if status.online != test.online {
t.Errorf("online, expected %v, got %v", test.online, status.online)
}
if status.configured != test.configured {
t.Errorf("configured, expected %v, got %v", test.configured, status.configured)
}
if status.runningIO != test.runningIO {
t.Errorf("runningIO, expected %v, got %v", test.runningIO, status.runningIO)
}
if status.runningSQL != test.runningSQL {
t.Errorf("runningSQL, expected %v, got %v", test.runningSQL, status.runningSQL)
}
if status.latency <= 0 {
t.Errorf("latency, expected > 0, got %v", status.latency)
}
})
}
}
func TestCheckReadOnlyStatus(t *testing.T) {
pool := getDockerPool(t)
network := getDockerNetwork(t, pool)
defer pool.RemoveNetwork(network)
master, masterResource := startMasterInstance(t, pool, network)
defer pool.Purge(masterResource)
slave, slaveResource := startSlaveInstance(t, pool, network, nil)
defer pool.Purge(slaveResource)
offline := startOfflineInstance(t)
tests := []struct {
msg string
db *sql.DB
online bool
readOnly bool
}{
{
msg: "master",
db: master,
online: true,
readOnly: false,
},
{
msg: "slave",
db: slave,
online: true,
readOnly: true,
},
{
msg: "offline",
db: offline,
online: false,
},
}
for _, test := range tests {
t.Run(test.msg, func(t *testing.T) {
status := checkReadOnlyStatus(test.db, defaultCheckTimeout)
if status.online != test.online {
t.Errorf("online, expected %v, got %v", test.online, status.online)
}
if status.readOnly != test.readOnly {
t.Errorf("readOnly, expected %v, got %v", test.readOnly, status.readOnly)
}
if status.latency <= 0 {
t.Errorf("latency, expected > 0, got %v", status.latency)
}
})
}
}
func TestCheckWsrepStatus(t *testing.T) {
pool := getDockerPool(t)
network := getDockerNetwork(t, pool)
defer pool.RemoveNetwork(network)
master, masterResource := startMasterInstance(t, pool, network)
defer pool.Purge(masterResource)
node1, node1Resource := startGaleraInstance(t, pool, network)
defer pool.Purge(node1Resource)
node2, node2Resource := startGaleraInstance(t, pool, network, node1)
defer pool.Purge(node2Resource)
node3, node3Resource := startGaleraInstance(t, pool, network, node1, node2)
defer pool.Purge(node3Resource)
tests := []struct {
msg string
db *sql.DB
online bool
ready bool
}{
{
msg: "master",
db: master,
online: false,
ready: false,
},
{
msg: "node1",
db: node1,
online: true,
ready: true,
},
{
msg: "node2",
db: node2,
online: true,
ready: true,
},
{
msg: "node3",
db: node3,
online: true,
ready: true,
},
// Can not find a way to make one of the nodes in a failed state
// The only reliable way to do it is to cut the nodes network
// But this makes the node to look offline for tests as well
}
for _, test := range tests {
t.Run(test.msg, func(t *testing.T) {
status := checkWsrepStatus(test.db, defaultCheckTimeout)
if status.online != test.online {
t.Errorf("online, expected %v, got %v", test.online, status.online)
}
if status.ready != test.ready {
t.Errorf("ready, expected %v, got %v", test.ready, status.ready)
}
if status.latency <= 0 {
t.Errorf("latency, expected > 0, got %v", status.latency)
}
})
}
}