JacksonYao287 commented on a change in pull request #2447:
URL: https://github.com/apache/ozone/pull/2447#discussion_r682542001
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File path: hadoop-ozone/dist/src/main/k8s/examples/ozone-ha/scm-statefulset.yaml
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@@ -52,6 +52,15 @@ spec:
volumeMounts:
- name: data
mountPath: /data
+ - name: bootstrap
+ image: '@docker.image@'
+ args:
+ - ozone
+ - scm
+ - --bootstrap
Review comment:
@ChenSammi the logic here is as follows.
we want to create 3 scm replicas in this yaml file. for each scm instance,
two init containers will be executed first, and then the container will be
started. it seem like we have 3 individual scm , and for each scm, we do `ozone
scm --init`, `ozone scm --bootstrap` and `ozone scm` sequentially one by one.
so for the first(primordial) scm, `ozone scm --init` succeeds , and the
next `ozone scm --bootstrap` will fail with the message (SCM bootstrap command
can only be executed in non-Primordial SCM), then it is started by `ozone scm`
as a primordial scm.
for the second and third scm, `ozone scm --init` will fail with the
message(SCM init command can only be executed in Primordial SCM), and `ozone
scm --bootstrap` will succeed, and then it is started by `ozone scm` as a
non-primordial scm
by this way , we got this scm HA cluster!
i am not sure is it clear to you ? please let me know if the description is
no clear, thanks
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