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100 lines
2.9 KiB
100 lines
2.9 KiB
package main
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import (
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"context"
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"fmt"
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"time"
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"github.com/tendermint/tendermint/libs/log"
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rpctypes "github.com/tendermint/tendermint/rpc/coretypes"
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e2e "github.com/tendermint/tendermint/test/e2e/pkg"
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)
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// Perturbs a running testnet.
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func Perturb(ctx context.Context, logger log.Logger, testnet *e2e.Testnet) error {
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timer := time.NewTimer(0) // first tick fires immediately; reset below
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defer timer.Stop()
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for _, node := range testnet.Nodes {
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for _, perturbation := range node.Perturbations {
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select {
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case <-ctx.Done():
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return ctx.Err()
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case <-timer.C:
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_, err := PerturbNode(ctx, logger, node, perturbation)
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if err != nil {
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return err
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}
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// give network some time to recover between each
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timer.Reset(20 * time.Second)
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}
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}
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}
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return nil
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}
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// PerturbNode perturbs a node with a given perturbation, returning its status
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// after recovering.
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func PerturbNode(ctx context.Context, logger log.Logger, node *e2e.Node, perturbation e2e.Perturbation) (*rpctypes.ResultStatus, error) {
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testnet := node.Testnet
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switch perturbation {
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case e2e.PerturbationDisconnect:
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logger.Info(fmt.Sprintf("Disconnecting node %v...", node.Name))
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if err := execDocker("network", "disconnect", testnet.Name+"_"+testnet.Name, node.Name); err != nil {
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return nil, err
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}
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time.Sleep(10 * time.Second)
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if err := execDocker("network", "connect", testnet.Name+"_"+testnet.Name, node.Name); err != nil {
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return nil, err
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}
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case e2e.PerturbationKill:
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logger.Info(fmt.Sprintf("Killing node %v...", node.Name))
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if err := execCompose(testnet.Dir, "kill", "-s", "SIGKILL", node.Name); err != nil {
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return nil, err
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}
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time.Sleep(10 * time.Second)
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if err := execCompose(testnet.Dir, "start", node.Name); err != nil {
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return nil, err
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}
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case e2e.PerturbationPause:
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logger.Info(fmt.Sprintf("Pausing node %v...", node.Name))
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if err := execCompose(testnet.Dir, "pause", node.Name); err != nil {
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return nil, err
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}
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time.Sleep(10 * time.Second)
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if err := execCompose(testnet.Dir, "unpause", node.Name); err != nil {
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return nil, err
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}
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case e2e.PerturbationRestart:
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logger.Info(fmt.Sprintf("Restarting node %v...", node.Name))
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if err := execCompose(testnet.Dir, "kill", "-s", "SIGTERM", node.Name); err != nil {
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return nil, err
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}
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time.Sleep(10 * time.Second)
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if err := execCompose(testnet.Dir, "start", node.Name); err != nil {
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return nil, err
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}
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default:
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return nil, fmt.Errorf("unexpected perturbation %q", perturbation)
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}
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// Seed nodes do not have an RPC endpoint exposed so we cannot assert that
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// the node recovered. All we can do is hope.
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if node.Mode == e2e.ModeSeed {
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return nil, nil
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}
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ctx, cancel := context.WithTimeout(ctx, 5*time.Minute)
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defer cancel()
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status, err := waitForNode(ctx, logger, node, 0)
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if err != nil {
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return nil, err
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}
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logger.Info(fmt.Sprintf("Node %v recovered at height %v", node.Name, status.SyncInfo.LatestBlockHeight))
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return status, nil
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}
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