Deprecate auto detection of container user (#7930)
There is no reliable way to handle fallbacks for MinIO deployments, due to various command line options and multiple locations which require access inside container. Parsing command line options is tricky to figure out which is the backend disk etc, we did try to fix this in implementations of check-user.go but it wasn't complete and introduced more bugs. This PR simplifies the entire approach to rather than running Docker container as non-root by default always, it allows users to opt-in. Such that they are aware that that is what they are planning to do. In-fact there are other ways docker containers can be run as regular users, without modifying our internal behavior and adding more complexities.master
Harshavardhana
5 years ago
committed by
kannappanr
parent
12353caf35
commit
55dd017e62
@ -1,135 +0,0 @@ |
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// +build ignore
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/* |
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package main |
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import ( |
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"fmt" |
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"log" |
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"os" |
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"os/user" |
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"syscall" |
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"github.com/minio/cli" |
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minio "github.com/minio/minio/cmd" |
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) |
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var defaultUserGroup string |
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func init() { |
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username := os.Getenv("MINIO_USERNAME") |
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groupname := os.Getenv("MINIO_GROUPNAME") |
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defaultUserGroup = username + ":" + groupname |
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} |
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func getUserGroup(path string) (string, error) { |
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fi, err := os.Stat(minio.PathJoin(path, ".minio.sys")) |
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if err != nil { |
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// Fresh directory we should default to what was requested by user.
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if os.IsNotExist(err) { |
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fi, err = os.Stat(path) |
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if err != nil { |
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return "", err |
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} |
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} else { |
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return "", err |
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} |
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} |
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stat, ok := fi.Sys().(*syscall.Stat_t) |
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if !ok { |
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// Unable to figure out uid/gid, default to defaultUserGroup
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return defaultUserGroup, nil |
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} |
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u, err := user.LookupId(fmt.Sprintf("%d", stat.Uid)) |
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if err != nil { |
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return fmt.Sprintf("%d:%d", stat.Uid, stat.Gid), nil |
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} |
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g, err := user.LookupGroupId(fmt.Sprintf("%d", stat.Gid)) |
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if err != nil { |
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return fmt.Sprintf("%d:%d", stat.Uid, stat.Gid), nil |
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} |
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return fmt.Sprintf("%s:%s", u.Username, g.Name), nil |
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} |
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func main() { |
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app := cli.NewApp() |
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app.Flags = append(minio.ServerFlags, minio.GlobalFlags...) |
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app.Action = func(ctx *cli.Context) { |
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// Fetch address option
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serverAddr := ctx.GlobalString("address") |
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if serverAddr == "" || serverAddr == ":9000" { |
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serverAddr = ctx.String("address") |
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} |
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if ctx.Args().First() == "help" { |
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cli.ShowCommandHelpAndExit(ctx, "check-user", 1) |
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} |
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if ctx.Args().First() != "minio" { |
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cli.ShowCommandHelpAndExit(ctx, "check-user", 1) |
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} |
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args := cli.Args(ctx.Args().Tail()) |
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if !args.Present() { |
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cli.ShowCommandHelpAndExit(ctx, "check-user", 1) |
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} |
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var ug string |
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var err error |
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switch args.First() { |
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case "gateway": |
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args = cli.Args(args.Tail()) |
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if args.First() != "nas" { |
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fmt.Println(defaultUserGroup) |
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return |
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} |
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args = cli.Args(args.Tail()) |
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if args.First() == "" { |
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fmt.Println("") |
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return |
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} |
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ug, err = getUserGroup(args.First()) |
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if err != nil { |
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log.Fatalln(err) |
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} |
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case "server": |
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var setArgs [][]string |
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setArgs, err = minio.GetAllSets(args.Tail()...) |
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if err != nil { |
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log.Fatalln(err) |
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} |
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var endpoints minio.EndpointList |
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_, endpoints, _, err = minio.CreateEndpoints(serverAddr, setArgs...) |
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if err != nil { |
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log.Fatalln(err) |
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} |
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for _, endpoint := range endpoints { |
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if !endpoint.IsLocal { |
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continue |
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} |
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ug, err = getUserGroup(endpoint.Path) |
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if err != nil { |
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log.Fatalln(err) |
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} |
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break |
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} |
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default: |
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cli.ShowCommandHelpAndExit(ctx, "check-user", 1) |
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} |
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fmt.Println(ug) |
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} |
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if err := app.Run(os.Args); err != nil { |
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log.Fatalln(err) |
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} |
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} |
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