4e9c1c5fd8
Unfortunately guestfish may error out silently (no return code of 1), making hunting down the error a bit obscure. To combat this we add a bunch of stdout output to the script, and look for that final step to validate success. To make this work, we need to copy the script over and execute it with the command module, because the script module puts everything into stderr. Change-Id: I8e514ceb2462870721745c9445ec149864a45f4d
80 lines
2.7 KiB
Bash
Executable File
80 lines
2.7 KiB
Bash
Executable File
#!/bin/bash -ex
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# clean up from any previous attempts
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rm -rf /tmp/*galera* /tmp/gvw*
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# provide default images to inspect
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infra_images="/data/images/infra1.img /data/images/infra2.img /data/images/infra3.img"
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# declare an array to map images to container names
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declare -A image_map
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# declare an array to map container names to uuid's
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declare -A uuid_map
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# at this stage, no galera container is the master
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master_cnt=""
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echo "Getting the list of galera container names."
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for img in ${infra_images}; do
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image_map[${img}]="$(virt-ls --add ${img} --mount /dev/vmvg00/openstack00 / | grep galera_container)"
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done
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# get the gvwstate.dat files from the image and
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# put it into a local folder using the same name
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# as the container
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for img in ${infra_images}; do
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mkdir -p /tmp/${image_map[$img]}
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echo "Copying *.dat from ${img} into /tmp/${image_map[$img]}/"
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guestfish --ro --add ${img} --mount /dev/vmvg00/openstack00 glob copy-out /${image_map[$img]}/*.dat /tmp/${image_map[$img]}/
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done
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# work through the existing gvwstate files
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# there may be more than one, so we need to
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# find the one holding the view_id
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for cnt in $(ls -1 /tmp | grep galera_container); do
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gvwstate_path="/tmp/${cnt}/gvwstate.dat"
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if [[ -e ${gvwstate_path} ]]; then
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echo "Found ${gvwstate_path}, extracting my_uuid/view_id."
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my_uuid=$(awk '/^my_uuid:/ { print $2 }' ${gvwstate_path})
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view_id=$(awk '/^view_id:/ { print $3 }' ${gvwstate_path})
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if [[ "${my_uuid}" == "${view_id}" ]]; then
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echo "Found galera master in ${gvwstate_path}."
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master_gvwstate_path=${gvwstate_path}
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master_cnt=${cnt}
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fi
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fi
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if [[ "${cnt}" == "${master_cnt}" ]]; then
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uuid_map[${cnt}]=${my_uuid}
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else
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uuid_map[${cnt}]=$(uuidgen)
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fi
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done
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echo "Prepare a new master gvwstate.dat in a temporary location."
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tmp_gvwstate="/tmp/gvwstate.dat"
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cp ${master_gvwstate_path} ${tmp_gvwstate}
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member_num=$(awk '/^member: '${my_uuid}'/ {print $3}' ${tmp_gvwstate})
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echo "Clearing the existing members."
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sed -i.bak '/^member:/d' ${tmp_gvwstate}
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echo "Inserting the new set of members."
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for cnt_uuid in "${uuid_map[@]}"; do
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sed -i.bak "/^#vwend$/i \\
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member: ${cnt_uuid} ${member_num}" ${tmp_gvwstate}
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done
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echo "Copying the new gvwstate.dat version to each working location."
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for cnt in "${!uuid_map[@]}"; do
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sed "s/my_uuid: .*/my_uuid: ${uuid_map[$cnt]}/" ${tmp_gvwstate} > /tmp/${cnt}/gvwstate.dat
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done
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echo "Putting the gvwstate.dat files back into the images."
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for img in ${infra_images}; do
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echo "Copying /tmp/${image_map[$img]}/gvwstate.dat into ${img}."
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guestfish --rw --add ${img} --mount /dev/vmvg00/openstack00 copy-in /tmp/${image_map[$img]}/gvwstate.dat /${image_map[$img]}/
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done
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echo "Image preparation completed."
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