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Merged
adwk67 merged 1 commit into from
Nov 9, 2026
Merged

docs: Fix races in the getting started script #859

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23 changes: 21 additions & 2 deletions docs/modules/hdfs/examples/getting_started/getting_started.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,11 @@ case "$1" in
"helm")
echo "Installing Operators with Helm"
# tag::helm-install-operators[]
helm install --wait zookeeper-operator oci://oci.stackable.tech/sdp-charts/zookeeper-operator --version 0.0.0-dev
helm install --wait hdfs-operator oci://oci.stackable.tech/sdp-charts/hdfs-operator --version 0.0.0-dev
helm install --wait commons-operator oci://oci.stackable.tech/sdp-charts/commons-operator --version 0.0.0-dev
helm install --wait secret-operator oci://oci.stackable.tech/sdp-charts/secret-operator --version 0.0.0-dev
helm install --wait listener-operator oci://oci.stackable.tech/sdp-charts/listener-operator --version 0.0.0-dev --set preset=stable-nodes
helm install --wait zookeeper-operator oci://oci.stackable.tech/sdp-charts/zookeeper-operator --version 0.0.0-dev
helm install --wait hdfs-operator oci://oci.stackable.tech/sdp-charts/hdfs-operator --version 0.0.0-dev
# end::helm-install-operators[]
;;
"stackablectl")
Expand Down Expand Up @@ -131,6 +131,25 @@ else
exit 1
fi

# The datanode can be ready before it has registered with the namenode;
# writes fail until it has.
echo "Waiting for a datanode to register with the namenode ..."
live=0
for (( i=1; i<=60; i++ ))
do
live=$(kubectl exec -n default webhdfs-0 -- curl -s "http://simple-hdfs-namenode-default-0.simple-hdfs-namenode-default.default.svc.cluster.local:9870/jmx?qry=Hadoop:service=NameNode,name=FSNamesystemState" | jq -r '.beans[0].NumLiveDataNodes // 0' || echo 0)
if [ "$live" -ge 1 ]; then
break
fi

sleep 2
done

if [ "$live" -lt 1 ]; then
echo "No datanode registered with the namenode"
exit 1
fi

echo "Copy test file"
# tag::copy-file[]
kubectl cp -n default ./testdata.txt webhdfs-0:/tmp
Expand Down
23 changes: 21 additions & 2 deletions docs/modules/hdfs/examples/getting_started/getting_started.sh.j2
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,11 @@ case "$1" in
"helm")
echo "Installing Operators with Helm"
# tag::helm-install-operators[]
helm install --wait zookeeper-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/zookeeper-operator --version {{ versions.zookeeper }}
helm install --wait hdfs-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/hdfs-operator --version {{ versions.hdfs }}
helm install --wait commons-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/commons-operator --version {{ versions.commons }}
helm install --wait secret-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/secret-operator --version {{ versions.secret }}
helm install --wait listener-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/listener-operator --version {{ versions.listener }} --set preset=stable-nodes
helm install --wait zookeeper-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/zookeeper-operator --version {{ versions.zookeeper }}
helm install --wait hdfs-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/hdfs-operator --version {{ versions.hdfs }}
# end::helm-install-operators[]
;;
"stackablectl")
Expand Down Expand Up @@ -131,6 +131,25 @@ else
exit 1
fi

# The datanode can be ready before it has registered with the namenode;
# writes fail until it has.
echo "Waiting for a datanode to register with the namenode ..."
live=0
for (( i=1; i<=60; i++ ))
do
live=$(kubectl exec -n default webhdfs-0 -- curl -s "http://simple-hdfs-namenode-default-0.simple-hdfs-namenode-default.default.svc.cluster.local:9870/jmx?qry=Hadoop:service=NameNode,name=FSNamesystemState" | jq -r '.beans[0].NumLiveDataNodes // 0' || echo 0)
if [ "$live" -ge 1 ]; then
break
fi

sleep 2
done

if [ "$live" -lt 1 ]; then
echo "No datanode registered with the namenode"
exit 1
fi

echo "Copy test file"
# tag::copy-file[]
kubectl cp -n default ./testdata.txt webhdfs-0:/tmp
Expand Down
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