forked from rook/rook
Sébastien Han
121c2987e3
We don't need to use tini. We don't have anything in the rook operator that would either create zombie processes (no threads) or use exec (to fork). The Go binary has a really good signal handling mechanism. Closes: https://github.com/rook/rook/issues/8794 Signed-off-by: Sébastien Han <seb@redhat.com>
93 lines
3.1 KiB
Go
93 lines
3.1 KiB
Go
/*
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Copyright 2016 The Rook Authors. All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 k8sutil for Kubernetes helpers.
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package k8sutil
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import (
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"fmt"
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"os"
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"strings"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/validation"
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)
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const (
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BinariesMountPath = "/rook"
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)
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// PathToVolumeName converts a path to a valid volume name
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func PathToVolumeName(path string) string {
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// kubernetes volume names must match this regex: [a-z0-9]([-a-z0-9]*[a-z0-9])?
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sanitized := make([]rune, 0, len(path))
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for _, c := range path {
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switch {
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case '0' <= c && c <= '9':
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fallthrough
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case 'a' <= c && c <= 'z':
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sanitized = append(sanitized, c)
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continue
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case 'A' <= c && c <= 'Z':
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// convert upper to lower case
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sanitized = append(sanitized, c+('a'-'A'))
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default:
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// convert any non alphanum char to a hyphen
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sanitized = append(sanitized, '-')
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}
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}
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volumeName := string(sanitized)
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// trim any leading/trailing hyphens
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volumeName = strings.TrimPrefix(volumeName, "-")
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volumeName = strings.TrimSuffix(volumeName, "-")
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if len(volumeName) > validation.DNS1123LabelMaxLength {
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// keep an equal sample of the original name from both the beginning and from the end,
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// and add some characters from a hash of the full name to help prevent name collisions.
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// Make room for 3 hyphens in the middle (~ellipsis) and 1 hyphen to separate the hash.
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hashLength := 8
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sampleLength := int((validation.DNS1123LabelMaxLength - hashLength - 3 - 1) / 2)
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first := volumeName[0:sampleLength]
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last := volumeName[len(volumeName)-sampleLength:]
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hash := Hash(volumeName)
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volumeName = fmt.Sprintf("%s---%s-%s", first, last, hash[0:hashLength])
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}
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return volumeName
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}
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// NodeConfigURI returns the node config URI path for this node
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func NodeConfigURI() (string, error) {
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nodeName := os.Getenv(NodeNameEnvVar)
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if nodeName == "" {
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return "", fmt.Errorf("cannot detect the node name. Please provide using the downward API in the rook operator manifest file")
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}
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return fmt.Sprintf("api/v1/nodes/%s/proxy/configz", nodeName), nil
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}
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func BinariesMountInfo() (v1.EnvVar, v1.Volume, v1.VolumeMount) {
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// To get rook inside the container, the config init container needs to copy "rook" binary into a volume.
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// Set the config flag so rook will copy the binaries.
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// Create the volume and mount that will be shared between the init container and the daemon container
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volumeName := "rookbinaries"
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e := v1.EnvVar{Name: "ROOK_COPY_BINARIES_PATH", Value: BinariesMountPath}
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v := v1.Volume{Name: volumeName, VolumeSource: v1.VolumeSource{EmptyDir: &v1.EmptyDirVolumeSource{}}}
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m := v1.VolumeMount{Name: volumeName, MountPath: BinariesMountPath}
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return e, v, m
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}
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