2017 - clsung is reading

2017-10-26

[GCP] Create disk from snapshot of another project

Step 0: create snapshot from desired disk, example name: disk-snapshot-20171026

Step 1: copy the selfLink from snapshot’s equivalent REST response: projects/another-project/global/snapshots/disk-snapshot-20171026

Note: One can get the link via the following command:

gcloud compute snapshots list --project=another-project --uri

1	gcloud compute snapshots list --project=another-project --uri

Step 2: execute the following command (replace current-project and asia-east1-a with your own project and zone, respectively)

gcloud compute disks create disk1 --project=current-project \
  --source-snapshot=projects/another-project/global/snapshots/disk-snapshot-20171026 \
  --zone=asia-east1-a

gcloud compute disks create disk1 --project=current-project \

--source-snapshot=projects/another-project/global/snapshots/disk-snapshot-20171026 \

--zone=asia-east1-a

2017-05-14

[docker] Multi-stage builds

Consider the following scenario: you are going to rolling update your cluster, and it turns out your network bandwidth is limited for some reason and size of built docker image is not small enough. What’s worse, every instance of cluster will need to pull the docker image before start-up… Read More

2017-04-18

CoreOS remove early-docker since 1284.0.0

It happens the docker daemon wasn’t alive when I login to the console.

Container Linux by CoreOS beta (1353.4.0)
Failed Units: 2
  docker.service
  docker.socket

$ sudo systemctl start docker.service
Failed to start docker.service: Unit early-docker.target not found.

$ grep -ri 'early-docker.target'
system/docker.service:After=docker.socket early-docker.target network.target
system/docker.service:Requires=docker.socket early-docker.target

Container Linux by CoreOS beta (1353.4.0)

Failed Units: 2

docker.service

docker.socket

$ sudo systemctl start docker.service

Failed to start docker.service: Unit early-docker.target not found.

$ grep -ri 'early-docker.target'

system/docker.service:After=docker.socket early-docker.target network.target

system/docker.service:Requires=docker.socket early-docker.target

After review the release document, it seems early-docker.target should be remove in all related target.

Ref: CoreOS Release 1284.0