Temp fix for the problem with failing jobs - move cache instead of co…

…pying

We've seen a number of workflows failing with `No space left on device`
error (e.g.
https://github.com/keep-network/keep-ecdsa/actions/runs/924123923).
The problem was a combination of a big cache size and significant memory
allocation after building Docker image.
According to moby/buildkit#1850:
"At the moment caches are copied over the existing cache so it keeps
growing".
As a temporary fix (until issue gets fixed by GH), we introduce a step
that moves the cache (similarily to how it's described in
moby/buildkit#1896).

The solution may not keep us from failures forever, as we still may
hit the problems with the full memory if the size of the Docker image
or cache increases (see this FD discussion:
https://www.flowdock.com/app/cardforcoin/tech/threads/Clml1_lI4HYRKrr3N_vcSInDn6A).

.github/workflows/client-celo.yml

@@ -80,7 +80,7 @@ jobs:
             HOST_CHAIN=celo
           load: true # load image to local registry to use it in next steps
           cache-from: type=local,src=/tmp/.buildx-celo-cache
-          cache-to: type=local,dest=/tmp/.buildx-celo-cache
+          cache-to: type=local,dest=/tmp/.buildx-celo-cache-new
 
       - name: Run Go tests
         run: |
@@ -111,4 +111,14 @@ jobs:
             HOST_CHAIN=celo
             REVISION=${{ github.sha }}
           # VERSION= ? TODO: Configure version, sample: 1.7.6
-          push: ${{ github.event_name == 'workflow_dispatch' }}
+          push: ${{ github.event_name == 'workflow_dispatch' }}
+
+      - # Temp fix - move cache instead of copying (added below step and
+        # modified value of `cache-to`).
+        # https://github.com/docker/build-push-action/issues/252
+        # https://github.com/moby/buildkit/issues/1896
+        # Without the change some jobs were failing with `no space left on device`
+        name: Move cache
+        run: |
+          rm -rf /tmp/.buildx-celo-cache
+          mv /tmp/.buildx-celo-cache-new /tmp/.buildx-celo-cache

.github/workflows/client-ethereum.yml

@@ -78,7 +78,7 @@ jobs:
           tags: go-build-env-ethereum
           load: true # load image to local registry to use it in next steps
           cache-from: type=local,src=/tmp/.buildx-ethereum-cache
-          cache-to: type=local,dest=/tmp/.buildx-ethereum-cache
+          cache-to: type=local,dest=/tmp/.buildx-ethereum-cache-new
 
       - name: Run Go tests
         run: |
@@ -110,6 +110,16 @@ jobs:
           # VERSION= ? TODO: Configure version, sample: 1.7.6
           push: ${{ github.event_name == 'workflow_dispatch' }}
 
+      - # Temp fix - move cache instead of copying (added below step and
+        # modified value of `cache-to`).
+        # https://github.com/docker/build-push-action/issues/252
+        # https://github.com/moby/buildkit/issues/1896
+        # Without the change some jobs were failing with `no space left on device`
+        name: Move cache
+        run: |
+          rm -rf /tmp/.buildx-ethereum-cache
+          mv /tmp/.buildx-ethereum-cache-new /tmp/.buildx-ethereum-cache
+
       - name: Notify CI about completion of the workflow
         if: github.event_name == 'workflow_dispatch'
         uses: keep-network/notify-workflow-completed@v1

.github/workflows/contracts.yml

@@ -281,7 +281,17 @@ jobs:
             revision=${{ github.sha }}
           push: true
           cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache-new
+
+      - # Temp fix - move cache instead of copying (added below step and
+        # modified value of `cache-to`).
+        # https://github.com/docker/build-push-action/issues/252
+        # https://github.com/moby/buildkit/issues/1896
+        # Without the change some jobs were failing with `no space left on device`
+        name: Move cache
+        run: |
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
       
       - name: Notify CI about completion of the workflow
         uses: keep-network/notify-workflow-completed@v1