Anthony Mastrean created NIFI-5955:
--------------------------------------
Summary: Provide a Docker HEALTHCHECK
Key: NIFI-5955
URL: https://issues.apache.org/jira/browse/NIFI-5955
Project: Apache NiFi
Issue Type: Improvement
Components: Docker
Reporter: Anthony Mastrean
It takes Nifi a noticeable amount of time to become available at
[http://localhost:8080/nifi.] We can help indicate readiness to both human and
machine users (see
[depends_on|https://docs.docker.com/compose/compose-file/compose-file-v2/#depends_on]
in Compose) by establishing a HEALTHCHECK in the Dockerfile.
The
[documentation|https://docs.docker.com/engine/reference/builder/#healthcheck]
suggests
{{HEALTHCHECK CMD curl -f http://localhost:8080/nifi || exit 1}}
But, there are [better cURL
flags|https://explainshell.com/explain?cmd=curl+-fsSL+example.org] for scripts.
{code:java}
HEALTHCHECK CMD curl -fsSL http://localhost:8080/nifi || exit 1
{code}
And I sometimes see problems using {{localhost}} (possibly a Docker networking
issue?). I've seen this pattern suggested elsewhere.
{code:java}
HEALTHCHECK CMD curl -fsSL http://$(hostname -i || echo localhost):8080/nifi ||
exit 1
{code}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
