mirror of
https://github.com/Finsys/dockhand.git
synced 2026-06-17 19:09:33 +03:00
jarek
64 lines
2.4 KiB
Bash
64 lines
2.4 KiB
Bash
#!/bin/sh
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# Dockhand Self-Update Sidecar
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# Dockhand pre-creates the new container. This script just does:
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# stop old → rm old → rename new → connect networks → start → verify
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#
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# Required env vars:
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# OLD_CONTAINER_ID - Container ID of the running Dockhand to replace
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# NEW_CONTAINER_ID - Container ID of the pre-created replacement
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# CONTAINER_NAME - Original container name to restore after rename
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# NETWORKS - Space-separated network names (optional)
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# NETWORK_OPTS_<net> - Per-network flags for docker network connect (optional)
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#
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# Optional:
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# STOP_TIMEOUT - Timeout for stopping container (default: 30)
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set -e
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log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"; }
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error() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] ERROR: $1" >&2; }
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[ -z "$OLD_CONTAINER_ID" ] && { error "OLD_CONTAINER_ID not set"; exit 1; }
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[ -z "$NEW_CONTAINER_ID" ] && { error "NEW_CONTAINER_ID not set"; exit 1; }
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[ -z "$CONTAINER_NAME" ] && { error "CONTAINER_NAME not set"; exit 1; }
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STOP_TIMEOUT="${STOP_TIMEOUT:-30}"
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log "Starting Dockhand update"
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log " Old: ${OLD_CONTAINER_ID:0:12}, New: ${NEW_CONTAINER_ID:0:12}, Name: $CONTAINER_NAME"
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log "Stopping container (timeout: ${STOP_TIMEOUT}s)..."
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docker stop -t "$STOP_TIMEOUT" "$OLD_CONTAINER_ID" || { error "Failed to stop container"; exit 1; }
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log "Container stopped"
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log "Removing old container..."
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docker rm "$OLD_CONTAINER_ID" || { error "Failed to remove old container"; exit 1; }
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log "Old container removed"
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log "Renaming container..."
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docker rename "$NEW_CONTAINER_ID" "$CONTAINER_NAME" || { error "Failed to rename container"; exit 1; }
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log "Container renamed to $CONTAINER_NAME"
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if [ -n "$NETWORKS" ]; then
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for NET in $NETWORKS; do
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OPTS_VAR="NETWORK_OPTS_$(echo "$NET" | tr '.-' '__')"
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OPTS=$(eval echo "\$$OPTS_VAR" 2>/dev/null || true)
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log "Connecting to network $NET ${OPTS:+($OPTS)}"
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# shellcheck disable=SC2086
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docker network connect $OPTS "$NET" "$NEW_CONTAINER_ID" || log " Warning: failed to connect to $NET"
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done
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log "Networks connected"
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fi
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log "Starting container..."
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docker start "$NEW_CONTAINER_ID" || { error "Failed to start container"; exit 1; }
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sleep 2
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STATE=$(docker inspect -f '{{.State.Status}}' "$NEW_CONTAINER_ID" 2>/dev/null)
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if [ "$STATE" = "running" ]; then
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log "Container is running"
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log "Update completed successfully!"
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else
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error "Container state: $STATE (expected running)"
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exit 1
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fi
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