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107 lines
3.5 KiB
107 lines
3.5 KiB
/*
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Copyright © 2019 Thorsten Klein <iwilltry42@gmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package util
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import (
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"fmt"
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"os"
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"strings"
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log "github.com/sirupsen/logrus"
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)
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// ValidateVolumeFlag checks, if the source of volume mounts exists and if the destination is an absolute path
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// a flag can look like this: --volume SRC:DST@NODES, where...
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// - SRC: source directory/file -> tests: must exist
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// - DEST: source directory/file -> tests: must be absolute path
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// - NODES: specifies a set of nodes -> tests: fit regex // TODO:
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func ValidateVolumeFlag(volumeFlags []string) (string, string, error) {
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for _, volume := range volumeFlags {
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src := ""
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dest := ""
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nodes := ""
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split := strings.Split(volume, "@")
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// max number of pieces after split = 2 (only one @ allowed in flag)
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if len(split) > 2 {
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return rolesToVolumesMap, fmt.Errorf("Invalid volume flag '%s': only one '@' allowed", volume)
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}
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// min number of pieces after split = 1 (catch empty flags)
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if len(split) > 1 {
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nodes = split[1]
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}
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// catch all other unlikely cases
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if len(split) == 0 || split[0] == "" {
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return rolesToVolumesMap, fmt.Errorf("Invalid volume flag '%s'", volume)
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}
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// validate 'SRC[:DEST]' substring
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split = strings.Split(split[0], ":")
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if len(split) < 1 || len(split) > 2 {
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return rolesToVolumesMap, fmt.Errorf("Invalid volume mount '%s': only one ':' allowed", volume)
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}
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// we only have SRC specified -> DEST = SRC
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if len(split) == 1 {
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src = split[0]
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dest = src
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} else {
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src = split[0]
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dest = split[1]
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}
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// verify that the source exists
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if src != "" {
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if _, err := os.Stat(src); err != nil {
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return rolesToVolumesMap, fmt.Errorf("Failed to stat file/dir that you're trying to mount: '%s' in '%s'", src, volume)
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}
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}
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// verify that the destination is an absolute path
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if !strings.HasPrefix(dest, "/") {
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return rolesToVolumesMap, fmt.Errorf("Volume mount destination doesn't appear to be an absolute path: '%s' in '%s'", dest, volume)
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}
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// put into struct
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volumeSpec.Source = src
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volumeSpec.Destination = dest
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// if no nodes are specified with an @nodeset, attach volume to all nodes and go to next value
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if nodes == "" {
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rolesToVolumesMap.AllRoles = append(rolesToVolumesMap.AllRoles, volumeSpec)
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continue
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}
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specifiedNodes, err := parseNodeSpecifier(nodes, masterCount, workerCount)
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if err != nil {
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log.Errorf("Failed to parse node specifier on '--volume %s'", volume)
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return rolesToVolumesMap, err
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}
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log.Debugf("Specified nodes: %+v", specifiedNodes)
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}
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return rolesToVolumesMap, nil
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}
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