github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/controllerutil/container_util.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package controllerutil
    21  
    22  import (
    23  	corev1 "k8s.io/api/core/v1"
    24  	"k8s.io/apimachinery/pkg/api/resource"
    25  )
    26  
    27  func GetContainerByName(containers []corev1.Container, name string) (int, *corev1.Container) {
    28  	for i, container := range containers {
    29  		if container.Name == name {
    30  			return i, &container
    31  		}
    32  	}
    33  	return -1, nil
    34  }
    35  
    36  func InjectZeroResourcesLimitsIfEmpty(c *corev1.Container) {
    37  	zeroValue := resource.MustParse("0")
    38  	if c.Resources.Limits == nil {
    39  		c.Resources.Limits = corev1.ResourceList{}
    40  	}
    41  
    42  	safeSetLimitValue := func(name corev1.ResourceName) {
    43  		if _, ok := c.Resources.Requests[name]; !ok {
    44  			if _, ok = c.Resources.Limits[name]; !ok {
    45  				c.Resources.Limits[name] = zeroValue
    46  			}
    47  		}
    48  	}
    49  	safeSetLimitValue(corev1.ResourceCPU)
    50  	safeSetLimitValue(corev1.ResourceMemory)
    51  }