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etcdctl: --cluster flag using cluster endpoints for endpoint commands

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Queries the cluster for endpoints to use for the endpoint commands.

Fixes #8117
This commit is contained in:
Anthony Romano 2017-06-20 15:24:50 -07:00
parent a40cdc7baa
commit 1a2be432c5
2 changed files with 62 additions and 19 deletions
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43
etcdctl/README.md
View File

@ -565,6 +565,10 @@ Prints a humanized table of the member IDs, statuses, names, peer addresses, and
ENDPOINT provides commands for querying individual endpoints.
#### Options
- cluster -- fetch and use all endpoints from the etcd cluster member list
### ENDPOINT HEALTH
ENDPOINT HEALTH checks the health of the list of endpoints with respect to cluster. An endpoint is unhealthy
@ -576,11 +580,20 @@ If an endpoint can participate in consensus, prints a message indicating the end
#### Example
Check the default endpoint's health:
```bash
./etcdctl endpoint health
# 127.0.0.1:32379 is healthy: successfully committed proposal: took = 2.130877ms
# 127.0.0.1:2379 is healthy: successfully committed proposal: took = 2.095242ms
# 127.0.0.1:22379 is healthy: successfully committed proposal: took = 2.083263ms
```
Check all endpoints for the cluster associated with the default endpoint:
```bash
./etcdctl endpoint --cluster health
# http://127.0.0.1:2379 is healthy: successfully committed proposal: took = 1.060091ms
# http://127.0.0.1:22379 is healthy: successfully committed proposal: took = 903.138µs
# http://127.0.0.1:32379 is healthy: successfully committed proposal: took = 1.113848ms
```
### ENDPOINT STATUS
@ -599,27 +612,31 @@ Prints a line of JSON encoding each endpoint URL, ID, version, database size, le
#### Examples
Get the status for the default endpoint:
```bash
./etcdctl endpoint status
# 127.0.0.1:2379, 8211f1d0f64f3269, 3.0.0, 25 kB, false, 2, 63
# 127.0.0.1:22379, 91bc3c398fb3c146, 3.0.0, 25 kB, false, 2, 63
# 127.0.0.1:32379, fd422379fda50e48, 3.0.0, 25 kB, true, 2, 63
```
Get the status for the default endpoint as JSON:
```bash
./etcdctl -w json endpoint status
# [{"Endpoint":"127.0.0.1:2379","Status":{"header":{"cluster_id":17237436991929493444,"member_id":9372538179322589801,"revision":2,"raft_term":2},"version":"3.0.0","dbSize":24576,"leader":18249187646912138824,"raftIndex":32623,"raftTerm":2}},{"Endpoint":"127.0.0.1:22379","Status":{"header":{"cluster_id":17237436991929493444,"member_id":10501334649042878790,"revision":2,"raft_term":2},"version":"3.0.0","dbSize":24576,"leader":18249187646912138824,"raftIndex":32623,"raftTerm":2}},{"Endpoint":"127.0.0.1:32379","Status":{"header":{"cluster_id":17237436991929493444,"member_id":18249187646912138824,"revision":2,"raft_term":2},"version":"3.0.0","dbSize":24576,"leader":18249187646912138824,"raftIndex":32623,"raftTerm":2}}]
# [{"Endpoint":"127.0.0.1:2379","Status":{"header":{"cluster_id":17237436991929493444,"member_id":9372538179322589801,"revision":2,"raft_term":2},"version":"3.0.0","dbSize":24576,"leader":18249187646912138824,"raftIndex":32623,"raftTerm":2}}]
```
Get the status for all endpoints in the cluster associated with the default endpoint:
```bash
./etcdctl -w table endpoint status
+-----------------+------------------+---------+---------+-----------+-----------+------------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+-----------------+------------------+---------+---------+-----------+-----------+------------+
| 127.0.0.1:2379 | 8211f1d0f64f3269 | 3.0.0 | 25 kB | false | 2 | 52 |
| 127.0.0.1:22379 | 91bc3c398fb3c146 | 3.0.0 | 25 kB | false | 2 | 52 |
| 127.0.0.1:32379 | fd422379fda50e48 | 3.0.0 | 25 kB | true | 2 | 52 |
+-----------------+------------------+---------+---------+-----------+-----------+------------+
./etcdctl -w table endpoint --cluster status
+------------------------+------------------+----------------+---------+-----------+-----------+------------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+------------------------+------------------+----------------+---------+-----------+-----------+------------+
| http://127.0.0.1:2379 | 8211f1d0f64f3269 | 3.2.0-rc.1+git | 25 kB | false | 2 | 8 |
| http://127.0.0.1:22379 | 91bc3c398fb3c146 | 3.2.0-rc.1+git | 25 kB | false | 2 | 8 |
| http://127.0.0.1:32379 | fd422379fda50e48 | 3.2.0-rc.1+git | 25 kB | true | 2 | 8 |
+------------------------+------------------+----------------+---------+-----------+-----------+------------+
```
### ALARM \<subcommand\>

38
etcdctl/ctlv3/command/ep_command.go
View File

@ -27,6 +27,8 @@ import (
"github.com/spf13/cobra"
)
var epClusterEndpoints bool
// NewEndpointCommand returns the cobra command for "endpoint".
func NewEndpointCommand() *cobra.Command {
ec := &cobra.Command{
@ -34,6 +36,7 @@ func NewEndpointCommand() *cobra.Command {
Short: "Endpoint related commands",
}
ec.PersistentFlags().BoolVar(&epClusterEndpoints, "cluster", false, "use all endpoints from the cluster member list")
ec.AddCommand(newEpHealthCommand())
ec.AddCommand(newEpStatusCommand())
@ -64,16 +67,12 @@ The items in the lists are endpoint, ID, version, db size, is leader, raft term,
// epHealthCommandFunc executes the "endpoint-health" command.
func epHealthCommandFunc(cmd *cobra.Command, args []string) {
flags.SetPflagsFromEnv("ETCDCTL", cmd.InheritedFlags())
endpoints, err := cmd.Flags().GetStringSlice("endpoints")
if err != nil {
ExitWithError(ExitError, err)
}
sec := secureCfgFromCmd(cmd)
dt := dialTimeoutFromCmd(cmd)
auth := authCfgFromCmd(cmd)
cfgs := []*v3.Config{}
for _, ep := range endpoints {
for _, ep := range endpointsFromCluster(cmd) {
cfg, err := newClientCfg([]string{ep}, dt, sec, auth)
if err != nil {
ExitWithError(ExitBadArgs, err)
@ -121,7 +120,7 @@ func epStatusCommandFunc(cmd *cobra.Command, args []string) {
statusList := []epStatus{}
var err error
for _, ep := range c.Endpoints() {
for _, ep := range endpointsFromCluster(cmd) {
ctx, cancel := commandCtx(cmd)
resp, serr := c.Status(ctx, ep)
cancel()
@ -139,3 +138,30 @@ func epStatusCommandFunc(cmd *cobra.Command, args []string) {
os.Exit(ExitError)
}
}
func endpointsFromCluster(cmd *cobra.Command) []string {
if !epClusterEndpoints {
endpoints, err := cmd.Flags().GetStringSlice("endpoints")
if err != nil {
ExitWithError(ExitError, err)
}
return endpoints
}
c := mustClientFromCmd(cmd)
ctx, cancel := commandCtx(cmd)
defer func() {
c.Close()
cancel()
}()
membs, err := c.MemberList(ctx)
if err != nil {
err = fmt.Errorf("failed to fetch endpoints from etcd cluster member list: %v", err)
ExitWithError(ExitError, err)
}
ret := []string{}
for _, m := range membs.Members {
ret = append(ret, m.ClientURLs...)
}
return ret
}