debug-cluster

#!/bin/bash
set -euo pipefail

daemonset_json=$(cat <<EOF
{
  "kind": "DaemonSet",
  "apiVersion": "apps/v1",
  "metadata": {
    "name": "ditm",
    "namespace": "default"
  },
  "spec": {
    "selector": {
      "matchLabels": {
        "ironcladlou/ditm": ""
      }
    },
    "template": {
      "metadata": {
        "labels": {
          "ironcladlou/ditm": ""
        }
      },
      "spec": {
        "tolerations": [
          {
            "operator": "Exists"
          }
        ],
        "volumes": [
          {
            "name": "host",
            "hostPath": {
              "path": "/",
              "type": "Directory"
            }
          }
        ],
        "containers": [
          {
            "name": "ditm",
            "image": "quay.io/dmace/ditm",
            "command": [
              "/bin/bash",
              "-c",
              "sleep infinity"
            ],
            "volumeMounts": [
              {
                "name": "host",
                "mountPath": "/host"
              }
            ],
            "securityContext": {
              "privileged": true,
              "runAsUser": 0
            }
          }
        ],
        "restartPolicy": "Always",
        "hostNetwork": true,
        "hostPID": true
      }
    }
  }
}
EOF
)

function cleanup {
  echo oc delete -n default daemonsets/ditm
}

oc apply -f - <<< "${daemonset_json}"
trap cleanup EXIT

while true; do
  latest_json=$(oc get -n default daemonsets/ditm -o json)
  remaining=$(jq '.status.numberUnavailable // 0' <<< "${latest_json}")
  [[ "$remaining" -eq 0 ]] && break
  echo "waiting for rollout, $remaining remaining"
  sleep 2
done

for pod_name in $(oc get -n default pods -o json -l ironcladlou/ditm= | jq -r '.items[].metadata.name'); do
  pod_node_name=$(oc get -n default "pods/$pod_name" -o jsonpath='{.spec.nodeName}')
  session_name="$pod_node_name"
  script=$(cat <<EOF
    tmux set-option default-command 'KUBECONFIG=$KUBECONFIG oc rsh --shell /bin/bash -n default pods/$pod_name'
    KUBECONFIG=$KUBECONFIG oc rsh --shell /bin/bash -n default pods/$pod_name
EOF
  )
  tmux new-session -d -s "$session_name" /bin/bash -c "${script}"
done