Creating an Image Snapshot
Scenarios
This section describes how you can create an image snapshot. For details about how image snapshots work, see Overview.
Procedure
To run a container, you need to pull the specified container image first. However, due to factors such as the network and container image size, the pod startup speed slows down by image pull. You can create a snapshot using the image to be used. Then, you can use the snapshot to create pods without pulling the images, speeding up pod startup.
- Log in to the CCI 2.0 console.
- In the navigation pane, choose Image Snapshots.
- Click Create from YAML in the upper right corner.
The following example creates an image snapshot named my-imagesnapshot.
apiVersion: cci/v2 kind: ImageSnapshot metadata: name: 'my-imagesnapshot' spec: buildingConfig: namespace: test-namespace eipID: xxxxxxxx imageSnapshotSize: 30 ttlDaysAfterCreated: 7 images: - image: 'nginx:stable-alpine-perl' registries: - imagePullSecret: imagepull-secret server: xxxxx.myhuaweicloud.com plainHTTP: true
Table 1 Parameter description Field
Type
Mandatory
Example Value
Description
.metadata.name
String
Yes
my-imagesnapshot
Image snapshot name.
.spec.images.image
String
Yes
nginx:latest
Image used to create an image snapshot.
.spec.registries.server
String
Yes
serverA.com
Image repository address without the http:// or https:// prefix.
.spec.registries.imagePullSecret
String
No
imagepull-secret
Secret for accessing the image repository.
.spec.registries.plainHTTP
boolean
No
true
If the self-managed image repository address uses the HTTP protocol, set the value to true, or the image fails to be pulled due to different protocols. The default value is false.
.spec.registries.insecureSkipVerify
boolean
No
true
If the self-managed image repository address uses a self-issued certificate, set the value to true to skip certificate authentication, or the image fails to be pulled due to certificate authentication failure. The default value is false.
.spec.buildingConfig.namespace
String
Yes
my-namespace-a
User namespace. During image snapshot creation, you need to create a pod in the user namespace.
.spec.buildingConfig.eipID
String
No
3cxxxxe0-xxxx-xxxx-xxxx-8xxxxf3xxxx4
EIP used for pulling images from the public network.
.spec.buildingConfig.autoCreateEIP
boolean
No
true
Whether to automatically assign an EIP for the pod that will create the image snapshot. If eipId is specified, this parameter is ignored. If this parameter is set to true, you need to specify the EIP configuration using autoCreateEIPAttribute.
.spec.buildingConfig.autoCreateEIPAttribute.bandwidthChargeMode
String
No
bandwidth
Whether the billing is based on traffic or bandwidth.
The value can be traffic or bandwidth. If this parameter is left blank or is an empty string, default value bandwidth is used. For IPv6 addresses, the default parameter value is bandwidth outside China and is traffic in China.
.spec.buildingConfig.autoCreateEIPAttribute.bandwidthSize
int
No
1000
Bandwidth size.
The value ranges from 1 Mbit/s to 2,000 Mbit/s by default.
.spec.buildingConfig.autoCreateEIPAttribute.type
String
No
5_bgp
EIP type.
The value can be 5_bgp (dynamic BGP), 5_sbgp (static BGP), or 5_youxuanbgp (premium BGP).
.spec.buildingConfig.autoCreateEIPAttribute.ipVersion
int
No
4
EIP version.
The value can be 4 or 6.
- 4 indicates IPv4. If this parameter is left empty or is an empty string, an IPv4 address is assigned by default.
- 6 indicates IPv6. If the parameter is set to 6, NAT64 is enabled.
.spec.buildingConfig.TimeoutMinutes
int
No
1440
Timeout interval for creating a snapshot, in minutes.
The value is an integer from 30 to 10,080 (which is one week). The default value is 1440, which is one day.
.spec.ttlDaysAfterCreated
integer
No
10
Retention period of the image snapshot, in days. Expired image snapshots will be deleted. The default value is 0, indicating that the image snapshot never expires.
When an image snapshot is used by a workload or pod, its expiration time is reset to the time when the image snapshot is used plus the image snapshot retention period.
NOTE:After an image snapshot expires, it still occupies the quota. You need to periodically review and delete expired image snapshots.
.spec.imageSnapshotSize
integer
No
20
Image snapshot size, in GiB. The default value is 20.
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