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server: Implement --ignore-disks for ignoring disks from healing. (#2158)

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By default server heals/creates missing directories and re-populates
`format.json`, in some scenarios when disk is down for maintainenance
it would be beneficial for users to ignore such disks rather than
mistakenly using `root` partition.

Fixes #2128
This commit is contained in:
Harshavardhana
2016-07-10 14:38:15 -07:00
committed by Anand Babu (AB) Periasamy
parent 0793237d94
commit bdff0848ed
8 changed files with 100 additions and 54 deletions
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39
server-main.go
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@@ -39,6 +39,11 @@ var serverCmd = cli.Command{
cli.StringFlag{
Name: "address",
Value: ":9000",
Usage: "Specify custom server \"ADDRESS:PORT\", defaults to \":9000\".",
},
cli.StringFlag{
Name: "ignore-disks",
Usage: "Specify comma separated list of disks that are offline.",
},
},
Action: serverMain,
@@ -52,8 +57,13 @@ OPTIONS:
{{range .Flags}}{{.}}
{{end}}
ENVIRONMENT VARIABLES:
MINIO_ACCESS_KEY: Access key string of 5 to 20 characters in length.
MINIO_SECRET_KEY: Secret key string of 8 to 40 characters in length.
ACCESS:
MINIO_ACCESS_KEY: Access key string of 5 to 20 characters in length.
MINIO_SECRET_KEY: Secret key string of 8 to 40 characters in length.
CACHING:
MINIO_CACHE_SIZE: Set total cache size in NN[GB|MB|KB]. Defaults to 8GB.
MINIO_CACHE_EXPIRY: Set cache expiration duration in NN[h|m|s]. Defaults to 72 hours.
EXAMPLES:
1. Start minio server.
@@ -65,16 +75,23 @@ EXAMPLES:
3. Start minio server on Windows.
$ minio {{.Name}} C:\MyShare
4. Start minio server 12 disks to enable erasure coded layer with 6 data and 6 parity.
4. Start minio server on 12 disks to enable erasure coded layer with 6 data and 6 parity.
$ minio {{.Name}} /mnt/export1/backend /mnt/export2/backend /mnt/export3/backend /mnt/export4/backend \
/mnt/export5/backend /mnt/export6/backend /mnt/export7/backend /mnt/export8/backend /mnt/export9/backend \
/mnt/export10/backend /mnt/export11/backend /mnt/export12/backend
5. Start minio server on 12 disks while ignoring two disks for initialization.
$ minio {{.Name}} --ignore-disks=/mnt/export1/backend,/mnt/export2/backend /mnt/export1/backend \
/mnt/export2/backend /mnt/export3/backend /mnt/export4/backend /mnt/export5/backend /mnt/export6/backend \
/mnt/export7/backend /mnt/export8/backend /mnt/export9/backend /mnt/export10/backend /mnt/export11/backend \
/mnt/export12/backend
`,
}
type serverCmdConfig struct {
serverAddr string
exportPaths []string
serverAddr string
disks []string
ignoredDisks []string
}
// configureServer configure a new server instance
@@ -292,13 +309,17 @@ func serverMain(c *cli.Context) {
// Check if requested port is available.
checkPortAvailability(getPort(net.JoinHostPort(host, port)))
// Save all command line args as export paths.
exportPaths := c.Args()
// Disks to be ignored in server init, to skip format healing.
ignoredDisks := strings.Split(c.String("ignore-disks"), ",")
// Disks to be used in server init.
disks := c.Args()
// Configure server.
apiServer := configureServer(serverCmdConfig{
serverAddr: serverAddress,
exportPaths: exportPaths,
serverAddr: serverAddress,
disks: disks,
ignoredDisks: ignoredDisks,
})
// Credential.