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https://github.com/ceph/ceph-csi.git
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36e099d939
This new Go module allows other projects (like Rook) to consume deployment details (the SCC to get started) directly from Ceph-CSI. Based-on: https://github.com/rook/rook/blob/3c93eb3/cluster/examples/kubernetes/ceph/operator-openshift.yaml#L47-L90 Signed-off-by: Niels de Vos <ndevos@redhat.com>
108 lines
3.3 KiB
Go
108 lines
3.3 KiB
Go
/*
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Copyright 2021 The Ceph-CSI Authors.
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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 ocp
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import (
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"bytes"
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_ "embed"
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"fmt"
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"text/template"
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"github.com/ghodss/yaml"
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secv1 "github.com/openshift/api/security/v1"
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)
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//go:embed scc.yaml
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var securityContextConstraints string
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// SecurityContextConstraintsValues contains values that need replacing in the
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// template.
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type SecurityContextConstraintsValues struct {
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// Namespace contains the OpenShift Namespace where the SCC will be
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// used.
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Namespace string
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// Deployer refers to the Operator that creates the SCC and
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// ServiceAccounts. This is an optional option.
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Deployer string
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}
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// SecurityContextConstraintsDefaults can be used for generating deployment
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// artifacts with defails values.
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var SecurityContextConstraintsDefaults = SecurityContextConstraintsValues{
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Namespace: "ceph-csi",
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Deployer: "",
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}
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// NewSecurityContextConstraints creates a new SecurityContextConstraints
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// object by replacing variables in the template by the values set in the
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// SecurityContextConstraintsValues.
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//
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// The deployer parameter (when not an empty string) is used as a prefix for
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// the name of the SCC and the linked ServiceAccounts.
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func NewSecurityContextConstraints(values SecurityContextConstraintsValues) (*secv1.SecurityContextConstraints, error) {
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data, err := NewSecurityContextConstraintsYAML(values)
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if err != nil {
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return nil, err
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}
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scc := &secv1.SecurityContextConstraints{}
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err = yaml.Unmarshal([]byte(data), scc)
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if err != nil {
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return nil, fmt.Errorf("failed convert YAML to %T: %w", scc, err)
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}
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return scc, nil
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}
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// internalSecurityContextConstraintsValues extends
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// SecurityContextConstraintsValues with some private attributes that may get
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// set based on other values.
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type internalSecurityContextConstraintsValues struct {
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SecurityContextConstraintsValues
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// Prefix is based on SecurityContextConstraintsValues.Deployer.
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Prefix string
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}
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// NewSecurityContextConstraintsYAML returns a YAML string where the variables
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// in the template have been replaced by the values set in the
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// SecurityContextConstraintsValues.
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func NewSecurityContextConstraintsYAML(values SecurityContextConstraintsValues) (string, error) {
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var buf bytes.Buffer
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// internalValues is a copy of values, but will get extended with
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// API-internal values
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internalValues := internalSecurityContextConstraintsValues{
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SecurityContextConstraintsValues: values,
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}
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if internalValues.Deployer != "" {
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internalValues.Prefix = internalValues.Deployer + "-"
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}
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tmpl, err := template.New("SCC").Parse(securityContextConstraints)
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if err != nil {
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return "", fmt.Errorf("failed to parse template: %w", err)
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}
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err = tmpl.Execute(&buf, internalValues)
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if err != nil {
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return "", fmt.Errorf("failed to replace values in template: %w", err)
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}
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return buf.String(), nil
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}
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